List GIS data needs + sources

Just to get us started.  What will we need?  I haven't started downloading anything yet...

Soils type data (or alternatively, zones of poor infiltration)

Topographic contours and/or slope map data (used to identify areas of prohibitively steep slopes)

• spot elevations  http://www.tnris.state.tx.us/datadownload/download.jsp
• contours  http://www.tnris.state.tx.us/datadownload/download.jsp
• 2ft contours, portions of Bexar county https://gis.sanantonio.gov/2ftContourDownload/
• hillshade http://www.twdb.state.tx.us/mapping/gisdata.asp

Digital elevation models or other topographic data (used to verify/identify drainage areas)

Groundwater elevations/depths (used to identify areas of high groundwater elevation)

Floodplain (e.g., FEMA) map data (used to identify areas where flood control is required)

Landslide and/or liquefaction zones (used to identify areas at risk for landslides or liquefaction)

Biologically or Environmentally Sensitive Areas (BSA/ESA) and/or wetlands mapping data (used to identify significant habitat/wetland areas)

• Natural Regions  http://www.tnris.state.tx.us/datadownload/download.jsp
• Biologic provinces  http://www.tpwd.state.tx.us/landwater/land/maps/gis/data_downloads/
• Ecoregions  http://www.tpwd.state.tx.us/landwater/land/maps/gis/data_downloads/

 Natural Resource Conservation Service

• Order by area

Aerial photographs at the highest resolution available (used to visually assess parcel/catchment and adjacent land characteristics)

• All of Bexar county 6" pixel 

Impervious surfaces (used to identify impervious and pervious areas for BMP implementation)

Precipitation

• http://www.tnris.state.tx.us/datadownload/download.jsp
• http://www.tpwd.state.tx.us/landwater/land/maps/gis/data_downloads/

Watershed boundaries

• HUC  http://www.tnris.state.tx.us/datadownload/download.jsp
• HUC  http://www.twdb.state.tx.us/mapping/gisdata.asp
• River basins  http://www.tpwd.state.tx.us/landwater/land/maps/gis/data_downloads/

Aquifers

• Aquifers http://www.twdb.state.tx.us/mapping/gisdata.asp
• Sole source aquifers  http://www.epa.gov/region6/water/swp/ssa/maps.htm

Surface Water 

• Atlas of surface water GIS data  http://www.tceq.state.tx.us/gis/SpatialIndex.html
• Impaired stream segments  http://www.tceq.state.tx.us/gis/ourmaps.html
• Permitted wastewater outfalls  http://www.tceq.state.tx.us/gis/sites.html

Parcel ownership (used to identify whether parcels are publicly or privately owned)

• Parcel data for Hays, Travis, Williamson, Bastrop and Caldwell Counties. 2005.  http://www.capcog.org/information-clearinghouse/geospatial-data/
• Parcel data for Bastrop, Burnet, Caldwell, Hays, Travis, and Williamson Counties. 2008. http://www.capcog.org/information-clearinghouse/geospatial-data/

Storm drain as-built drawings (including flow direction, slopes, invert elevations, pipe sizes)

Land use

• Edwards aquifer land use/land cover   http://www.tceq.state.tx.us/gis/lulc.html
• Land Fragmentation Analysis 2005, 2008 (vacant land) for capital area  http://www.capcog.org/information-clearinghouse/geospatial-data/

Administrative

• Groundwater conservation districts  http://www.twdb.state.tx.us/mapping/gisdata.asp
• Priority groundwater management areas  http://www.twdb.state.tx.us/mapping/gisdata.asp
• regional water planning areas  http://www.twdb.state.tx.us/mapping/gisdata.asp

Misc

• Central Texas Greenprint for Growth  http://www.capcog.org/information-clearinghouse/geospatial-data/