Geologic Map of the San Marcos North Quadrangle and Adjacent Portions of the Mountain City and San Marcos South Quadrangles, Hays, Caldwell and Guadalupe Counties, Texas.
Digitally redrafted and georeferenced color version of the 1:24,000 paper geologic maps contained in Grimshaw, T.W., 1976, Environmental geology of urban and urbanized areas, a case study from the San Marcos area, Texas [Ph.D. thesis], Austin, Texas, The University of Texas at Austin, 244 p. Scale 1:24,000.
Files in this work contains four different georeferenced versions of the original map. The versions, as distinguished by Download File name, are: 1) San_Marcos_GCSWGS84_collarless.zip: zipped files that include a collarless map in TIFF format and ancillary ArcGIS v. 10.2 georeferencing files and metadata. The spatial reference is geographic coordinates relative to the WGS84 datum; the map is unprojected. 2) San_Marcos_UTM_collarless.zip: a zipped file that includes a collarless map in TIFF format and ancillary ArcGIS v. 10.2 georeferencing files and metadata. The spatial reference/projection is UTM zone 14 relative to the NAD27 datum. 3) San_Marcos.pdf: a GeoPDF of the full collared map referenced/projected to UTM zone 14 coordinates relative to the NAD83 datum. 4) San_Marcos.kmz: a KML version of the collarless map for viewing in Google Earth. The spatial reference is geographic coordinates relative to the WGS84 datum. Further metadata for each map version are available in Federal Geographic Data Committee ( FGDC)-compliant metadata file within the zip files and in the document Properties of the GeoPDF and KML files when opened in Adobe Acrobat or Google Earth.