Soils (PB640_Guam_a)

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator:
U.S. Department of Agriculture, Natural Resources Conservation Service
Publication_Date: 20090501
Title: Soils (PB640_Guam_a)
Publication_Information:
Publication_Place: Fort Worth, Texas
Publisher:
U.S. Department of Agriculture, Natural Resources Conservation Service
Other_Citation_Details: pb640
Online_Linkage: URL:<http://SoilDataMart.nrcs.usda.gov/>
Geospatial_Data_Presentation_Form: vector digital data
Description:
Abstract:
This data set is a digital soil survey and generally is the most detailed level of soil geographic data developed by the National Cooperative Soil Survey. The information was prepared by digitizing maps, by compiling information onto a planimetric correct base and digitizing, or by revising digitized maps using remotely sensed and other information.
This data set consists of georeferenced digital map data and computerized attribute data. The map data are in a soil survey area extent format and include a detailed, field verified inventory of soils and miscellaneous areas that normally occur in a repeatable pattern on the landscape and that can be cartographically shown at the scale mapped. A special soil features layer (point and line features) is optional. This layer displays the location of features too small to delineate at the mapping scale, but they are large enough and contrasting enough to significantly influence use and management. The soil map units are linked to attributes in the National Soil Information System relational database, which gives the proportionate extent of the component soils and their properties.
Purpose:
SSURGO depicts information about the kinds and distribution of soils on the landscape. The soil map and data used in the SSURGO product were prepared by soil scientists as part of the National Cooperative Soil Survey.
Supplemental_Information:
Digital versions of hydrography, cultural features, and other associated layers that are not part of the SSURGO data set may be available from the primary organization listed in the Point of Contact.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20021015
Ending_Date: 20090507
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: 144.618069
East_Bounding_Coordinate: 144.956955
North_Bounding_Coordinate: 13.654421
South_Bounding_Coordinate: 13.234019
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: soil survey
Theme_Keyword: soils
Theme_Keyword: Soil Survey Geographic
Theme_Keyword: SSURGO
Place:
Place_Keyword_Thesaurus: USGS Geographic Names Information System (GNIS)
Place_Keyword: Territory of Guam
Place_Keyword: Ritidian Point North
Place_Keyword: Agana North
Place_Keyword: Ritidian Point (digital)
Place_Keyword: Pati Point
Place_Keyword: Apra Harbor (digital)
Place_Keyword: Agana (digital)
Place_Keyword: Dededo (digital)
Place_Keyword: Agat (digital)
Place_Keyword: Talofofo (digital)
Place_Keyword: Merizo (digital)
Place_Keyword: Inarajan (digital)
Access_Constraints: None
Use_Constraints:
The U.S. Department of Agriculture, Natural Resources Conservation Service, should be acknowledged as the data source in products derived from these data.
This data set is not designed for use as a primary regulatory tool in permitting or citing decisions, but may be used as a reference source. This is public information and may be interpreted by organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application. Federal, State, or local regulatory bodies are not to reassign to the Natural Resources Conservation Service any authority for the decisions that they make. The Natural Resources Conservation Service will not perform any evaluations of these maps for purposes related solely to State or local regulatory programs.
Photographic or digital enlargement of these maps to scales greater than at which they were originally mapped can cause misinterpretation of the data. If enlarged, maps do not show the small areas of contrasting soils that could have been shown at a larger scale. The depicted soil boundaries, interpretations, and analysis derived from them do not eliminate the need for onsite sampling, testing, and detailed study of specific sites for intensive uses. Thus, these data and their interpretations are intended for planning purposes only. Digital data files are periodically updated. Files are dated, and users are responsible for obtaining the latest version of the data.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Department of Agriculture, Natural Resources Conservation Service
Contact_Position: State Soil Scientist
Contact_Address:
Address_Type: mailing address
Address: USDA - Natural Resources Conservation Service
Address: Pacific Basin Office
Address: FHB Building, Suite 301
Address: 400 Route 8
City: Maite
State_or_Province: GU
Postal_Code: 96927-2003
Contact_Voice_Telephone: 671-472-7182
Contact_TDD/TTY_Telephone: 800-877-8339
Contact_Electronic_Mail_Address: bob.gavenda@pb.usda.gov
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.6.1500
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Attribute accuracy is tested by manual comparison of the source with hard copy plots and/or symbolized display of the map data on an interactive computer graphic system. Selected attributes that cannot be visually verified on plots or on screen are interactively queried and verified on screen. In addition, the attributes are tested against a master set of valid attributes. All attribute data conform to the attribute codes in the signed classification and correlation document and amendment(s).
Logical_Consistency_Report:
Certain node/geometry and topology GT- polygon/chain relationships are collected or generated to satisfy topological requirements (the GT-polygon corresponds to the soil delineation). Some of these requirements include: chains must begin and end at nodes, chains must connect to each other at nodes, chains do not extend through nodes, left and right GT-polygons are defined for each chain element and are consistent throughout, and the chains representing the limits of the file are free of gaps. The tests of logical consistency are performed using vendor software. All internal polygons are tested for closure with vendor software and are checked on hard copy plots. All data are checked for common soil lines (i.e., adjacent polygons with the same label). Edge locations generally do not deviate from centerline to centerline by more than 0.01 inch.
Completeness_Report:
A map unit is a collection of areas defined and named in terms of their soil components or miscellaneous areas or both. Each map unit differs in some respect from all others in a survey area and each map unit has a symbol that uniquely identifies the map unit on a soil map. Each individual area, point, or line so identified on the map is a delineation.
Soil Scientists identify small areas of soils or miscellaneous areas that have properties and behavior significantly different than the named soils in the surrounding map unit. These minor components may be indicated as special features. If they have a minimal effect on use and management, or could not be precisely located, they may not be indicated on the map.
A map unit has specified kinds of soils or miscellaneous areas (map unit components), each with a designated range in proportionate extent. Map units include one or more kinds of soil or miscellaneous area. Miscellaneous areas are areas that have little or no recognizable soil.
Specific National Cooperative Soil Survey standards and procedures were used in the classification of soils, design and name of map units, and location of special soil features. These standards are outlined in Agricultural Handbook 18, Soil Survey Manual, 1993, USDA, NRCS; Agricultural Handbook 436, Soil Taxonomy, 1995, USDA, NRCS; and all Amendments; Keys to Soil Taxonomy, (current issue) USDA, NRCS; National Soil Survey Handbook, title 430-VI,(current issue) USDA, NRCS.
The actual composition and interpretive purity of the map unit delineations were based on data collected by scientists during the course of preparing the soil maps. Adherence to National Cooperative Soil Survey standards and procedures is based on peer review, quality control, and quality assurance. Quality control is outlined in the memorandum of understanding for the soil survey area and in documents that reside with the Natural Resources Conservation Service state soil scientist. Four kinds of map units are used in soil surveys: consociations, complexes, associations, and undifferentiated groups.
Consociations - Consociations are named for the dominant soil. In a consociation, delineated areas use a single name from the dominant component in the map unit. Dissimilar components are minor in extent. The soil component in a consociation may be identified at any taxonomic level. Soil series is the lowest taxonomic level. A consociation that is named as a miscellaneous area is dominantly that kind of area and minor components do not significantly affect the use of the map unit. The total amount of dissimilar inclusions of other components in a map unit generally does not exceed about 15 percent if limiting and 25 percent if nonlimiting. A single component of a dissimilar limiting inclusion generally does not exceed 10 percent if very contrasting.
Complexes and associations - Complexes and associations consist of two or more dissimilar components that occur in a regularly repeating pattern. The total amount of other dissimilar components is minor extent. The following arbitrary rule determines whether complex or association is used in the name. The major components of an association can be separated at the scale of mapping. In either case, because the major components are sufficiently different in morphology or behavior, the map unit cannot be called a consociation. In each delineation of a complex or an association, each major component is normally present though their proportions may vary appreciably from one delineation to another. The total amount of inclusions in a map unit that are dissimilar to any of the major components does not exceed 15 percent if limiting and 25 percent if nonlimiting. A single kind of dissimilar limiting inclusion usually does not exceed 10 percent.
Undifferentiated groups - Undifferentiated groups consist of two or more components that are not consistently associated geographically and, therefore, do not always occur together in the same map delineation. These components are included in the same named map unit because their use and management are the same or very similar for common uses. Generally they are grouped together because some common feature, such as steepness, stoniness, or flooding, determines their use and management. If two or more additional map units would serve no useful purpose, they may be included in the same unit. Each delineation has at least one of the major components, and some may have all of them. The same principles regarding the proportion of minor components that apply to consociations also apply to undifferentiated groups. The same principles regarding proportion of inclusion apply to undifferentiated groups as to consociations.
Minimum documentation consists of three complete soil profile descriptions that are collected for each soil added to the legend, one additional per 3,000 acres mapped; three 10 observation transects for each map unit, one additional 10 point transect per 3,000 acres.
A defined standard or level of confidence in the interpretive purity of the map unit delineations is attained by adjusting the kind and intensity of field investigations. Field investigations and data collection are carried out in sufficient detail to name map units and to identify accurately and consistently areas of about 2 acres.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The accuracy of these digital data is based upon their compilation to base maps that meet National Map Accuracy Standards at a scale of 1 inch equals 1,000 feet. The difference in positional accuracy between the soil boundaries and special soil features locations in the field and their digitized map locations is unknown. The locational accuracy of soil delineations on the ground varies with the transition between map units.
For example, on long gently sloping landscapes the transition occurs gradually over many feet. Where landscapes change abruptly from steep to level, the transition will be very narrow. Soil delineation boundaries and special soil features generally were digitized within 0.01 inch of their locations on the digitizing source. The digital map elements are edge matched between data sets. The data along each quadrangle edge are matched against the data for the adjacent quadrangle. Edge locations generally do not deviate from centerline to centerline by more than 0.01 inch.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Department of Agriculture, Soil Conservation Service
Publication_Date: 1988
Title: Soil Survey of Territory of Guam
Geospatial_Data_Presentation_Form: atlas
Publication_Information:
Publication_Place: Washington, D.C.
Publisher: U.S. Government Printing Office
Source_Scale_Denominator: 25000
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2004
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: SCS1
Source_Contribution:
source of soil map unit delineations, soil symbols, and special soil features
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 1975
Title: multiple orthophotographs
Geospatial_Data_Presentation_Form: remote sensing image
Publication_Information:
Publication_Place: Reston, Virginia
Publisher: U.S. Geological Survey
Source_Scale_Denominator: 4800
Type_of_Source_Media: stable-base material
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1997
Source_Currentness_Reference: 1997
Source_Citation_Abbreviation: USGS1
Source_Contribution: compilation base
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 1967
Title: Digital Raster Graphs
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Salt Lake City, Utah
Publisher: U.S. Geological Survey
Source_Scale_Denominator: 24000
Type_of_Source_Media: digital
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2000
Source_Currentness_Reference: 2000
Source_Citation_Abbreviation: USGS2
Source_Contribution: base map used for verification of digital plots
Source_Information:
Source_Citation:
Citation_Information:
Originator:
U.S. Department of Agriculture, Natural Resources Conservation Service
Publication_Date: unpublished material
Title: annotated stable-base overlays
Geospatial_Data_Presentation_Form: map
Source_Scale_Denominator: 4800
Type_of_Source_Media: stable-base material
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2002
Source_Currentness_Reference: 2002
Source_Citation_Abbreviation: NRCS1
Source_Contribution: source material for scanning
Source_Information:
Source_Citation:
Citation_Information:
Originator:
U.S. Department of Agriculture, Natural Resources Conservation Service
Publication_Date: 2002
Title: Soil Survey Geographic (SSURGO) database for Territory of Guam
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Fort Worth, Texas
Publisher:
U.S. Department of Agriculture, Natural Resources Conservation Service, National Cartography and Geospatial Center
Source_Scale_Denominator: 24000
Type_of_Source_Media: online
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2002
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: NRCS2
Source_Contribution: SSURGO data used in reevaluation of data
Source_Information:
Source_Citation:
Citation_Information:
Originator:
U.S. Department of Agriculture, Natural Resources Conservation Service
Publication_Date: 2004
Title: National Soil Information System (NASIS) data base
Geospatial_Data_Presentation_Form: tabular digital data
Publication_Information:
Publication_Place: Fort Collins, Colorado
Publisher:
U.S. Department of Agriculture, Natural Resources Conservation Service
Type_of_Source_Media: database
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 2004
Ending_Date: 2006
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: NASIS
Source_Contribution: attribute (tabular) information
Source_Information:
Source_Citation:
Citation_Information:
Originator:
U.S. Department of Agriculture, Natural Resources Conservation Service
Publication_Date: 2004
Title: Soil Survey Geographic (SSURGO) database for Territory of Guam
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Fort Worth, Texas
Publisher:
U.S. Department of Agriculture, Natural Resources Conservation Service, National Cartography and Geospatial Center
Source_Scale_Denominator: 24000
Type_of_Source_Media: online
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2004
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: NRCS3
Source_Contribution: SSURGO data used in re-projection
Source_Information:
Source_Citation:
Citation_Information:
Originator:
U.S. Department of Agriculture, Natural Resources Conservation Service
Publication_Date: 2006
Title: Orthophoto Mosaic for Guam
Geospatial_Data_Presentation_Form: remote sensing image
Source_Scale_Denominator: 12000
Type_of_Source_Media: online
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20050521
Ending_Date: 20060331
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: NRCS4
Source_Contribution: photographic base map for field mapping
Source_Information:
Source_Citation:
Citation_Information:
Originator:
U.S. Department of Agriculture, Natural Resources Conservation Service
Publication_Date: unpublished material
Title: Guam shapefiles
Geospatial_Data_Presentation_Form: vector digital data
Source_Scale_Denominator: 12000
Type_of_Source_Media: CD-ROM
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2009
Source_Currentness_Reference: date of completion
Source_Citation_Abbreviation: NRCS5
Source_Contribution: re-projected soil survey
Process_Step:
Process_Description:
The Territory of Guam Soil Survey was published in 1983 at 1:25000 scale. The classification and map unit names were finalized at the final correlation in 1985. An evaluation was made of the soil survey and it was determined that the soil map unit delineations required additional detail and modification. One additional map unit was added to the soil survey. The changes were made to reflect present day soil survey concepts, soil classification, and soil interpretations. Amendments to the correlation document reflecting these changes are on file at the NRCS MLRA (MO) Soil Survey Regional Office in Davis, California. The additional map unit is as follows:
56-----Water
Source_Used_Citation_Abbreviation: SCS1
Process_Date: 1997
Process_Step:
Process_Description:
The soil survey data was manually compiled from 1:25000 scale soil survey maps to 1:4,800 scale orthophographs during the soil map unit compilation process. Soil map unit delineations and special soil features were manually transferred from the orthophographs (4800 scale) to annotated stable-base overlays to be used as a scanning source.
Source_Used_Citation_Abbreviation: SCS1, USGS1, NRCS1
Process_Date: 1997
Process_Step:
Process_Description:
The annotated overlays were raster scanned on a IDEAL FSS 5000 Scanner at a resolution of 300 dpi. The soil area features and special soil features were processed in LT4X Version 4.11. The soil processing consisted of raster editing, map neat line development, labeling, edge matching and vector conversion. The soil area features and special soil features were written to Digital Line Graph Optional format in LT4X. Digitizing and quality control were done by the geographic information system specialist and cartographic technicians at the Temple Texas Digitizing and Certification Center.
Source_Used_Citation_Abbreviation: NRCS1
Process_Date: 1999
Process_Step:
Process_Description:
The soil area features and special soil features DLGs were imported into ARC/INFO 7.2.1. The quadrangles for each coverage were merged together into a soil survey area and additional editing was performed. The digital data was plotted on DRGs, at a scale of 1:24000, to allow NRCS soil scientists to verify and edit the soil survey data. These edits were then incorporated into the digital data and new DLGs reflecting these changes were written utilizing ARC/INFO 7.2.1.
Source_Used_Citation_Abbreviation: USGS1, USGS2, NRCS1
Process_Date: 2000
Process_Step:
Process_Description:
The DLG-3 Optional format files (24000 scale) were evaluated with the October 1998 ARC/INFO SSURGO Evaluation AMLs provided by the U.S. Department of Agriculture (USDA), Natural Resources Conservation Service (NRCS), National Cartography and Geospatial Center (NCGC), Fort Worth, Texas. Upon successful completion of the SSURGO Evaluation, the DLGs were processed with the October 1998 archiving AMLs provided by the NCGC staff.
Source_Used_Citation_Abbreviation: NRCS1
Process_Date: 2002
Process_Step:
Process_Description:
The Map Unit Record data base was developed by the NRCS soil scientists according to national standards.
Source_Used_Citation_Abbreviation: SCS1, NRCS1
Process_Date: 2001
Process_Step:
Process_Description:
The online SSURGO data has been rearchived due to changes in the tabular structure. The online SSURGO data were imported to ARC/INFO Version 7.2.1 at the Temple, Texas Digitizing and Certification Center of the Natural Resources Conservation Service. The soil survey area coverages and special soil feature coverages were processed with the December 2003 Certification AMLs provided by the National Cartography and Geospatial Center, Fort Worth, Texas. The certified spatial data were then electronically transferred to the NRCS staging server for archival in the Soil Data Warehouse.
Source_Used_Citation_Abbreviation: NRCS2
Process_Date: 2004
Process_Step:
Process_Description:
The National Soil Information System database was developed by NRCS soil scientists according to national standards and specifications.
Source_Used_Citation_Abbreviation: SCS1
Process_Date: 2004
Process_Step:
Process_Description:
The Natural Resources Conservation Service State Soil Scientist or delegate, upon completion of data quality verification, determined that the tabular data should be released for official use. A selected set of map units and components in the soil survey legend was copied to a staging database, and rating values for selected interpretations were generated. The list of selected interpretations is stored in the database table named sainterp.
Source_Used_Citation_Abbreviation: NASIS
Process_Date: 20041123
Process_Step:
Process_Description:
The Natural Resources Conservation Service State Soil Scientist or delegate verified that the labels on the digitized soil map units link to map units in the tabular database, and certified the joined data sets for release to the Soil Data Warehouse. A system assigned version number and date stamp were added and the data were copied to the data warehouse. The tabular data for the map units and components were extracted from the data warehouse and reformatted into the soil data delivery data model, then stored in the Soil Data Mart. The spatial data were copied to the Soil Data Mart without change.
Source_Used_Citation_Abbreviation: NASIS
Process_Date: 20041123
Process_Step:
Process_Description:
The Natural Resources Conservation Service State Soil Scientist or delegate, upon completion of data quality verification, determined that the tabular data should be released for official use. A selected set of map units and components in the soil survey legend was copied to a staging database, and rating values for selected interpretations were generated. The list of selected interpretations is stored in the database table named sainterp.
Source_Used_Citation_Abbreviation: NASIS
Process_Date: 20060112
Process_Step:
Process_Description:
The Natural Resources Conservation Service State Soil Scientist or delegate verified that the labels on the digitized soil map units link to map units in the tabular database, and certified the joined data sets for release to the Soil Data Warehouse. A system assigned version number and date stamp were added and the data were copied to the data warehouse. The tabular data for the map units and components were extracted from the data warehouse and reformatted into the soil data delivery data model, then stored in the Soil Data Mart. The spatial data were copied to the Soil Data Mart without change.
Source_Used_Citation_Abbreviation: NASIS
Process_Date: 20060112
Process_Step:
Process_Description:
The Natural Resources Conservation Service State Soil Scientist or delegate, upon completion of data quality verification, determined that the tabular data should be released for official use. A selected set of map units and components in the soil survey legend was copied to a staging database, and rating values for selected interpretations were generated. The list of selected interpretations is stored in the database table named sainterp.
Source_Used_Citation_Abbreviation: NASIS
Process_Date: 20060718
Process_Step:
Process_Description:
The Natural Resources Conservation Service State Soil Scientist or delegate verified that the labels on the digitized soil map units link to map units in the tabular database, and certified the joined data sets for release to the Soil Data Warehouse. A system assigned version number and date stamp were added and the data were copied to the data warehouse. The tabular data for the map units and components were extracted from the data warehouse and reformatted into the soil data delivery data model, then stored in the Soil Data Mart. The spatial data were copied to the Soil Data Mart without change.
Source_Used_Citation_Abbreviation: NASIS
Process_Date: 20060719
Process_Step:
Process_Description:
The Natural Resources Conservation Service State Soil Scientist or delegate, upon completion of data quality verification, determined that the tabular data should be released for official use. A selected set of map units and components in the soil survey legend was copied to a staging database, and rating values for selected interpretations were generated. The list of selected interpretations is stored in the database table named sainterp.
Source_Used_Citation_Abbreviation: NASIS
Process_Date: 20060920
Process_Step:
Process_Description:
The Natural Resources Conservation Service State Soil Scientist or delegate verified that the labels on the digitized soil map units link to map units in the tabular database, and certified the joined data sets for release to the Soil Data Warehouse. A system assigned version number and date stamp were added and the data were copied to the data warehouse. The tabular data for the map units and components were extracted from the data warehouse and reformatted into the soil data delivery data model, then stored in the Soil Data Mart. The spatial data were copied to the Soil Data Mart without change.
Source_Used_Citation_Abbreviation: NASIS
Process_Date: 20060921
Process_Step:
Process_Description:
The Natural Resources Conservation Service State Soil Scientist or delegate, upon completion of data quality verification, determined that the tabular data should be released for official use. A selected set of map units and components in the soil survey legend was copied to a staging database, and rating values for selected interpretations were generated. The list of selected interpretations is stored in the database table named sainterp.
Source_Used_Citation_Abbreviation: NASIS
Process_Date: 20061229
Process_Step:
Process_Description:
The Natural Resources Conservation Service State Soil Scientist or delegate verified that the labels on the digitized soil map units link to map units in the tabular database, and certified the joined data sets for release to the Soil Data Warehouse. A system assigned version number and date stamp were added and the data were copied to the data warehouse. The tabular data for the map units and components were extracted from the data warehouse and reformatted into the soil data delivery data model, then stored in the Soil Data Mart. The spatial data were copied to the Soil Data Mart without change.
Source_Used_Citation_Abbreviation: NASIS
Process_Date: 20061229
Process_Step:
Process_Description:
The Natural Resources Conservation Service State Soil Scientist or delegate verified that the labels on the digitized soil map units link to map units in the tabular database, and certified the joined data sets for release to the Soil Data Warehouse. A system assigned version number and date stamp were added and the data were copied to the data warehouse. The tabular data for the map units and components were extracted from the data warehouse and reformatted into the soil data delivery data model, then stored in the Soil Data Mart. The spatial data were copied to the Soil Data Mart without change.
Source_Used_Citation_Abbreviation: NASIS
Process_Date: 20081201
Process_Step:
Process_Description:
The Guam Soil Survey was re-projected to match the digital orthophotographs. The soilmu_a_pb640.shp file was downloaded from the Soil Data Mart (SDM) by the GIS staff at the Pacific Islands Area State Office in Honolulu, Hawaii. The digitized soil survey was re-projected from Geographic to UTM and the NAD83 datum was transformed to WGS84 using the ARCGIS Version 9.2 software. 1) Using project in ArcToolbox created soilmu_a_pb640_n27.shp by selecting geographic NAD27.prj, and NAD_1927_To_NAD_1983_NADCON transformation method 2) Used Define Projection in ArcToolbox to change the projection info of soilmu_a_pb640_n27.shp to GCS_Guam_1963 by clicking on guam 1963.prj, found under Geographic Coordinate Systems, Oceans. 3) Input soilmu_a_pb640_n27.shp (at this point it is geographic, Guam 1963 datum) into Project in ArcToolbox to create soilmu_a_pb640_n83Harn.shp by selecting Geographic Coordinate Systems, North America, North American 1983 HARN.prj, (shows as GCS_North_American_1983_HARN under Output Coordinate System) using Guam_1963_To_HARN_Guam transformation method. 4) Input soilmu_a_pb640_n83Harn.shp in Project to create soilmu_a_pb640_utmwgs84.shp by selecting Projected Coordinate Systems, UTM, WGS 1984, WGS 1984 UTM Zone 55 N.prj, selecting the first transformation method in the list: NAD_1983_HARN_To_WGS_1984 The GIS staff sent the shapefiles for Guam to the Michigan Digitizing Unit (MIDU) staff.
Source_Used_Citation_Abbreviation: NRCS3, NRCS4, NRCS5
Process_Date: 2009
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Patricia Shade
Contact_Organization: NRCS
Contact_Position: GIS Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: 300 Ala Moana Blvd., Rm. 4-118
City: Honolulu
State_or_Province: Hawaii
Postal_Code: 96813
Country: USA
Contact_Voice_Telephone: 808 541-2600 x120
Contact_Facsimile_Telephone: 808 541-1335
Contact_Electronic_Mail_Address: patricia.shade@hi.usda.gov
Process_Step:
Process_Description:
The staff at the National Cartography and Geospatial Center (NCGC) in Fort Worth, Texas, revised the software that was used to check the soil survey coverage. The SSURGO (Soil SURvey GeOgraphic) Database ARC Macro Language (AML) programs were modified to allow archiving of projects in the Pacific Basin with the WGS84 datum and spheriod. The revised AMLs were sent to the MIDU staff in East Lansing, Michigan. The MIDU staff processed the digitized soil survey with these November 2008 SSURGO Certification AML programs. Upon successful completion of the SSURGO Evaluation, a dataset archive was created. The archive included: -Spatial data: Geodatabase, coverages and shapefile -Tabular data: SSURGO download dated 12/29/2006 -Metadata The archive was written to a CD and mailed to the soils staff at the Pacific Islands Area State Office.
Source_Used_Citation_Abbreviation: NRCS5, NASIS
Process_Date: 20090507
Process_Step:
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Guam Coastal Management Program, Bureau of Statistics and Plans
Contact_Person: Maria Kottermair
Contact_Position: GIS Support for GCMP, University of Guam (WERI)
Contact_Voice_Telephone: 671-472-4201-3
Contact_Electronic_Mail_Address: mariakottermair@uguamlive.uog.edu
Process_Description:
Joined table with table "mapunit" from the soil geodatabase called "pb640_Guam_Jan2010" based on the musym field. Exporedt joined table to new shapefile. Deleted all new fields from mapunit except "muname". Added new fields "Mapunit" and "Slope". Populated fields by extracting information from muname. Added geometry.
Process_Date: 2012
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geodetic_Model:
Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224
Planar:
Planar_Coordinate_Information:
Planar_Distance_Units: meters
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: soils
Entity_Type_Definition:
Special Soil Features represent soil, miscellaneous area, or landform features that are too small to be digitized as soil delineations (area features).
Entity_Type_Definition_Source:
Agricultural Handbook 18, Soil Survey Manual, 1993, USDA, SCS.
Attribute:
Attribute_Label: OBJECTID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: PB640_A_
Attribute:
Attribute_Label: PB640_A_ID
Attribute:
Attribute_Label: MUSYM
Attribute:
Attribute_Label: MUKEY
Attribute:
Attribute_Label: AREASYMBOL
Attribute:
Attribute_Label: muname
Attribute:
Attribute_Label: Area_ha
Attribute:
Attribute_Label: MapUnit
Attribute:
Attribute_Label: Area_m2
Attribute:
Attribute_Label: Slope
Attribute:
Attribute_Label: Area_ac
Attribute:
Attribute_Label: Area_mi
Attribute:
Attribute_Label: Perimtr_km
Attribute:
Attribute_Label: Perimtr_mi
Attribute:
Attribute_Label: Shape_Length
Attribute_Definition: Length of feature in internal units.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
Attribute:
Attribute_Label: Shape_Area
Attribute_Definition: Area of feature in internal units squared.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
Overview_Description:
Entity_and_Attribute_Overview:
Map Unit Delineations are closed polygons that may be dominated by a single soil or miscellaneous area component plus allowable similar or dissimilar soils, or they can be geographic mixtures of groups of soils or soils and miscellaneous areas.
The map unit symbol uniquely identifies each closed map unit delineation. Each symbol corresponds to a map unit name. The map unit key is used to link to information in the National Soil Information System tables.
Map Unit Delineations are described by the National Soil Information System database. This attribute database gives the proportionate extent of the component soils and the properties for each soil. The database contains both estimated and measured data on the physical and chemical soil properties and soil interpretations for engineering, water management, recreation, agronomic, woodland, range, and wildlife uses of the soil.
The National Soil Information System database contains static metadata. It documents the data structure and includes such information as what tables, columns, indexes, and relationships are defined as well as a variety of attributes of each of these database objects. Attributes include table and column descriptions and detailed domain information.
The National Soil Information System database also contains a distribution metadata. It records the criteria used for selecting map units and components for inclusion in the set of distributed data.
Special features are described in the feature table. It includes an area symbol, feature label, feature name, and feature description for each special and ad hoc feature in the survey area.
Entity_and_Attribute_Detail_Citation:
Soil Taxonomy: A basic system of soil classification for making and interpreting soil surveys. Agricultural Handbook 436, 1999, USDA, SCS.
Keys to Soil Taxonomy (current issue), USDA, SCS.
National Soil Survey Handbook, Title 430-VI, part 647 (current issue), USDA, NRCS.
Agricultural Handbook 18, Soil Survey Manual, 1993, USDA, SCS.
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Department of Agriculture, Natural Resources Conservation Service, National Cartography and Geospatial Center
Contact_Address:
Address_Type: mailing and physical address
Address: 501 West Felix Street, Building 23, P.O. Box 6567
City: Fort Worth
State_or_Province: Texas
Postal_Code: 76115
Contact_Voice_Telephone: 800 672 5559
Contact_Facsimile_Telephone: 817 509 3469
Resource_Description: Territory of Guam SSURGO
Distribution_Liability:
Although these data have been processed successfully on a computer system at the U.S. Department of Agriculture, no warranty expressed or implied is made by the Agency regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. The U.S. Department of Agriculture will warrant the delivery of this product in computer readable format, and will offer appropriate adjustment of credit when the product is determined unreadable by correctly adjusted computer input peripherals, or when the physical medium is delivered in damaged condition. Request for adjustment of credit must be made within 90 days from the date of this shipment from the ordering site.
The U.S. Department of Agriculture, nor any of its agencies are liable for misuse of the data, for damage, for transmission of viruses, or for computer contamination through the distribution of these data sets. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, sex, religion, age, disability, political beliefs, sexual orientation, or marital or family status. (Not all prohibited bases apply to all programs.)
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ARC/INFO coverage
Format_Information_Content: spatial
Transfer_Size: 3.3
Digital_Transfer_Option:
Offline_Option:
Offline_Media: CD-ROM
Recording_Format: ISO 9660 Level 2
Digital_Form:
Digital_Transfer_Information:
Format_Name: ArcView shapefile
Format_Information_Content: spatial
Transfer_Size: 4.6
Digital_Transfer_Option:
Offline_Option:
Offline_Media: CD-ROM
Recording_Format: ISO 9660 Level 2
Digital_Form:
Digital_Transfer_Information:
Format_Name: ASCII
Format_Information_Content: keys and attributes
Transfer_Size: 11.7
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: URL:<http://SoilDataMart.nrcs.usda.gov/>
Access_Instructions:
Select desired survey area at above Internet Web site. An email address is required for receipt of instructions on retrieval via anonymous FTP. Anticipate a delay between submission of request at Web site and receipt of email message.
Fees:
There is currently no direct charge for requesting data or for retrieval via FTP.
Ordering_Instructions:
Visit the above mentioned Internet Web Site, select state or territory, then select individual soil survey area of interest. Spatial line data and locations of special feature symbols are in ESRI ArcGIS (ArcView,ArcInfo) shapefile, coverage and interchange (i.e., export) formats. The National Soil Information System attribute soil data are available in variable length, pipe delimited, ASCII file format.
Turnaround: Typically within four hours
Metadata_Reference_Information:
Metadata_Date: 20100325
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Department of Agriculture, Natural Resources Conservation Service
Contact_Person: REQUIRED: The person responsible for the metadata information.
Contact_Position: State Soil Scientist
Contact_Address:
Address_Type: mailing address
Address: USDA - Natural Resources Conservation Service
Address: Pacific Basin Office
Address: FHB Building, Suite 301
Address: 400 Route 8
City: Maite
State_or_Province: GU
Postal_Code: 96927-2003
Contact_Voice_Telephone: 671-472-7182
Contact_TDD/TTY_Telephone: 800-877-8339
Contact_Electronic_Mail_Address: bob.gavenda@pb.usda.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Review_Date: 20131010
Lineage:
Generated by mp version 2.9.3 on Sun Oct 20 21:33:24 2013