Layer Descriptions

Although our data includes a State Soil Geographic Database (STATSGO) map unit polygon feature class, this feature class is not available via a Web Map Service (WMS) or Web Feature Service (WFS) web service at this time. Data in the underlying spatial data table (gsmmupolygon) may, however, be accessed via Structured Query Language (SQL) queries.

surveyareapolyBack to Top

This layer corresponds to our Soil Survey Geographic Database (SSURGO) survey area status map polygon feature class (as opposed to our SSURGO survey area boundary polygon feature class). Tabular attributes include survey area symbol (sastatusmap.areasymbol), survey area name (sastatusmap.areaname), survey area publication status code (sastatusmap.sapubstatuscode), survey area publication status name (sastatusmap.sapubstatusname), the date and time when the corresponding record was last updated (sastatusmap.wlupdated), the map region in which the corresponding survey area occurs (sastatusmap.mapregion), manuscript status code (sastatusmap.manustatuscode), manuscript status name (sastatusmap.manustatusname), survey area version number (sastatusmap.saversion), survey area version established date and time (sastatusmap.saverest) and a Boolean value that indicates is data for the corresponding survey area is complete (sastatusmap.iscomplete).

For a GetMap request for this layer, polygon fill is solid. Brown fill indicates that spatial data is available for the corresponding survey area and grey fill indicates that spatial data is not available for the corresponding survey area.

surveyareapolytransparentBack to Top

This layer corresponds to our Soil Survey Geographic Database (SSURGO) survey area status map polygon feature class (as opposed to our SSURGO survey area boundary polygon feature class).

For a GetMap request for this layer, polygon fill is 75% transparent. Brown fill indicates that spatial data is available for the corresponding survey area and grey fill indicates that spatial data is not available for the corresponding survey area.

surveyareapolyoutlineBack to Top

This layer corresponds to our Soil Survey Geographic Database (SSURGO) survey area status map polygon feature class (as opposed to our SSURGO survey area boundary polygon feature class).

For a GetMap request for this layer, there is no polygon fill.

mapunitpolyBack to Top

This layer corresponds to our Soil Survey Geographic Database (SSURGO) map unit polygon feature class. Within a survey area for which spatial data is available, this feature class is required. Tabular attributes include survey area symbol (mupolygon.areasymbol), survey area spatial version (mupolygon.spatialversion), map unit symbol (mupolygon.musym) and map unit key (mupolygon.mukey).

For either WFS or WMS services, if either "aoiid" or "interpresultid" are specified the returned layer data are constrained to the related persistent AOI's area. If "interpresultid" is specified then WFS will also return rating class attributes "MapUnitRatingString" (for character-valued classes), "MapUnitRatingNumeric" (for numeric-valued classes) and "RgbString" (for symbol color). In WMS the map features will be colored according to the "RgbString".

mapunitpolyextendedBack to Top

This layer corresponds to our Soil Survey Geographic Database (SSURGO) map unit polygon feature class. In addition to the tabular attributes included for layer "mapunitpoly", each aggregated attribute in table "muaggatt" for the corresponding map unit is also returned.

For either WFS or WMS services, if either "aoiid" or "interpresultid" are specified the returned layer data are constrained to the related persistent AOI's area. If "interpresultid" is specified then WFS will also return rating class attributes "MapUnitRatingString" (for character-valued classes), "MapUnitRatingNumeric" (for numeric-valued classes) and "RgbString" (for symbol color). In WMS the map features will be colored according to the "RgbString".

mapunitpolythematicBack to Top

This layer corresponds to our Soil Survey Geographic Database (SSURGO) map unit polygon feature class rated for a selected soil property or interpretation, the selection is performed within Web Soil Survey rather than through Soil Data Access. In addition to the tabular attributes included for layer "mapunitpoly", rating class attributes "MapUnitRatingString" (for character-valued classes), "MapUnitRatingNumeric" (for numeric-valued classes) and "RgbString" (for polygon fill color) are also returned.

To access this Web Soil Survey data via either the WFS or WMS services the "thematicmapid" must be specified. Only Web Mercator data and maps may be requested.

Interpretations may also be calculated through Soil Data Access. To access this data the "interpresultid" must be specified.

mapunitlineBack to Top

This layer corresponds to our Soil Survey Geographic Database (SSURGO) map unit line feature class. Within a survey area for which spatial data is available, this feature class is optional. Tabular attributes include survey area symbol (muline.areasymbol), survey area spatial version (muline.spatialversion), map unit symbol (muline.musym) and map unit key (muline.mukey).

For either WFS or WMS services, if either "aoiid" or "interpresultid" are specified the returned layer data are constrained to the related persistent AOI's area. If "interpresultid" is specified then WFS will also return rating class attributes "MapUnitRatingString" (for character-valued classes), "MapUnitRatingNumeric" (for numeric-valued classes) and "RgbString" (for symbol color). In WMS the map features will be colored according to the "RgbString".

mapunitlineextendedBack to Top

This layer corresponds to our Soil Survey Geographic Database (SSURGO) map unit line feature class. In addition to the tabular attributes included for layer "mapunitline", each aggregated attribute in table "muaggatt" for the corresponding map unit is also returned.

For either WFS or WMS services, if either "aoiid" or "interpresultid" are specified the returned layer data are constrained to the related persistent AOI's area. If "interpresultid" is specified then WFS will also return rating class attributes "MapUnitRatingString" (for character-valued classes), "MapUnitRatingNumeric" (for numeric-valued classes) and "RgbString" (for symbol color). In WMS the map features will be colored according to the "RgbString".

mapunitlinethematicBack to Top

This layer corresponds to our Soil Survey Geographic Database (SSURGO) map unit line feature class rated for a selected soil property or interpretation, the selection is performed within Web Soil Survey rather than through Soil Data Access. In addition to the tabular attributes included for layer "mapunitline", rating class attributes "MapUnitRatingString" (for character-valued classes), "MapUnitRatingNumeric" (for numeric-valued classes) and "RgbString" (for line color) are also returned.

To access this Web Soil Survey data via either the WFS or WMS services the "thematicmapid" must be specified. Only Web Mercator data and maps may be requested.

Interpretations may also be calculated through Soil Data Access. To access this data the "interpresultid" must be specified.

mapunitpointBack to Top

This layer corresponds to our Soil Survey Geographic Database (SSURGO) map unit point feature class. Within a survey area for which spatial data is available, this feature class is optional. Tabular attributes include survey area symbol (mupoint.areasymbol), survey area spatial version (mupoint.spatialversion), map unit symbol (mupoint.musym) and map unit key (mupoint.mukey).

For either WFS or WMS services, if either "aoiid" or "interpresultid" are specified the returned layer data are constrained to the related persistent AOI's area. If "interpresultid" is specified then WFS will also return rating class attributes "MapUnitRatingString" (for character-valued classes), "MapUnitRatingNumeric" (for numeric-valued classes) and "RgbString" (for symbol color). In WMS the map features will be colored according to the "RgbString".

mapunitpointextendedBack to Top

This layer corresponds to our Soil Survey Geographic Database (SSURGO) map unit point feature class. In addition to the tabular attributes included for layer "mapunitpoint", each aggregated attribute in table "muaggatt" for the corresponding map unit is also returned.

For either WFS or WMS services, if either "aoiid" or "interpresultid" are specified the returned layer data are constrained to the related persistent AOI's area. If "interpresultid" is specified then WFS will also return rating class attributes "MapUnitRatingString" (for character-valued classes), "MapUnitRatingNumeric" (for numeric-valued classes) and "RgbString" (for symbol color). In WMS the map features will be colored according to the "RgbString".

mapunitpointthematicBack to Top

This layer corresponds to our Soil Survey Geographic Database (SSURGO) map unit point feature class rated for a selected soil property or interpretation, the selection is performed within Web Soil Survey rather than through Soil Data Access. In addition to the tabular attributes included for layer "mapunitpoint", rating class attributes "MapUnitRatingString" (for character-valued classes), "MapUnitRatingNumeric" (for numeric-valued classes) and "RgbString" (for point symbol color) are also returned.

To access this Web Soil Survey data via either the WFS or WMS services the "thematicmapid" must be specified. Only Web Mercator data and maps may be requested.

Interpretations may also be calculated through Soil Data Access. To access this data the "interpresultid" must be specified.

featlineBack to Top

This layer corresponds to our Soil Survey Geographic Database (SSURGO) feature line class with extra description drawn from the related feature description class. Tabular attributes include survey area symbol (featline.areasymbol), survey area spatial version (featlines.spatialversion), a very short feature symbol (featline.featsym), feature name (featdesc.featname) and feature description (featdesc.featdesc).

For either WFS or WMS services, if either "aoiid" or "interpresultid" are specified the returned layer data are constrained to the relaied persistent AOI's area.

featpointBack to Top

This layer corresponds to our Soil Survey Geographic Database (SSURGO) feature point class with extra description drawn from the related feature description class. Tabular attributes include survey area symbol (featpoint.areasymbol), survey area spatial version (featpoint.spatialversion), a very short feature symbol (featpoint.featsym), feature name (featdesc.featname) and feature description (featdesc.featdesc).

For either WFS or WMS services, if either "aoiid" or "interpresultid" are specified the returned layer data are constrained to the relaied persistent AOI's area.

aoiBack to Top

This layer shows the oitline of an area of interest if "aoiid", "interpresultid" or "thematicmapid" are specified for a WMS request. The outline is approximate (bounding rectangles around each mapunit's polygonal data) in the case where the AOI is of type "mapunitkeylist".

aoihatchedBack to Top

This is the same as the "aoi" layer except that the boundary is filled with a hatch.

aoilabeledBack to Top

This is the same as the "aoi" layer except that if the AOI is "multipart" the part names are used to label each part.