ArcGIS REST Services Directory
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GeMS_Quaternary_deposits (FeatureServer)

View In:   Map Viewer

Service Description: This work converts an earlier work into the required format for inclusion in the National Geologic Map Database. The original work makes the Quaternary deposits elements contained in the source reports available as a single, areally continuous digital map. The original mapping of the deposits was directed at providing a geologic framework for assessing the liquefaction susceptibility of surficial deposits in the San Francisco Bay region, but at the same time created what is still the best representation of Quaternary deposits in the region. NOTE: These data had a horizontal (95 m) and vertical (7.5 m) offset from other known data sources. This was resolved by changing the false easting to 500095 and the false northing to 7.4. The data were also reprojected in California State Plane Zone III NAD 83. The data were downloaded here: https://www.sciencebase.gov/catalog/item/6500a888d34ed30c2057f94a

Service ItemId: 94ac8d800c9c49df9c329ef36aced8ce

Has Versioned Data: false

Max Record Count: 2000

Supported query Formats: JSON

Supports applyEdits with GlobalIds: False

Supports Shared Templates: False

All Layers and Tables

Layers:

Description: This is a conversion of Wentworth and others (2023)[DAS1] to the Geologic Map Schema (GeMS) for inclusion in the National Geologic Map Database. The original publication was in the Alacarte schema commonly used for geologic map databases prior to the release of the now mandatory GeMS. The GIS layers in this release have the same scientific content as the source data release. The source data release lacks description of map units, however, so those have been copied verbatim from the two principal sources for that work (Witter and others, 2006 [DAS2]; Knudsen and others, 2000 [DAS3]).

Copyright Text:

Spatial Reference: 102643 (2227)

Initial Extent:
Full Extent:
Units: esriFeet

Child Resources:   Info

Supported Operations:   Query   ConvertFormat   Get Estimates