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GIS-Data Sources

GIS-Data Sources. Francisco Olivera, Ph.D., P.E. Srikanth Koka Department of Civil Engineering Texas A&M University. Introduction. It is important to know what data is needed, what format is preferred and where it can be found.

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GIS-Data Sources

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  1. GIS-Data Sources Francisco Olivera, Ph.D., P.E. Srikanth Koka Department of Civil Engineering Texas A&M University

  2. Introduction • It is important to know what data is needed, what format is preferred and where it can be found. • Different agencies develop and/or make available digital spatial data.

  3. NCRS • NRCS: National Resources Conservation Service • STATGO: State Soil Geographic Database • http://www.ftw.nrcs.usda.gov/stat_data.html • Scale: 1:250,000 • SSURGO: Soil Survey Geographic Database • http://www.ftw.nrcs.usda.gov/ssur_data.html • More detailed than STATSGO • Scale: Between 1:12,000 and 1:63,360

  4. USGS • http://seamless.usgs.gov/viewer.htm • Resolution: 30 m • Available datasets • NED: National Elevation Dataset (30 m) • NLCD: National Land Cover Dataset (1992, 2001)

  5. USGS • http://nhd.usgs.gov/ • NHD: National Hydrographic Dataset • Vector data containing surface water features like streams, lakes, ponds, springs, etc. • Scale: 1:100,000

  6. USGS • http://water.usgs.gov/lookup/getspatial?huc250k • HUC: Hydrologic Unit Codes • Vector data containing drainage areas • Four levels of classification: • Regions (2-digit code) • Sub-regions (4-digit code) • Accounting units (6-digit code) • Cataloging units (8-digit code)

  7. BTS • http://www.bts.gov/gis/ntatlas/networks.html • Available data • National Parks • State Boundaries • Airports • Amtrak Stations • U.S. Army Corps of Engineers Ports • U.S. Corps of Engineers Navigable Waterway Nodes • Hydrographic Features metadata • National Highway Planning Network • Railway Network • U.S. Corps of Engineers Navigable Waterway Network

  8. TCEQ • http://www.tceq.state.tx.us/index.html • Available Data: • Digital raster graphs (DRGs) • Monitoring sites • Permit sites • Waste sites

  9. TNRIS • http://www.tnris.state.tx.us/digital.htm • Available Data: • Roads • Hydrography • Vegetation • DOQQs • County boundaries

  10. TWDB • http://www.twdb.state.tx.us/mapping/gisdata.htm • Available Data: • NATURAL FEATURES • Aquifers • River Basins • HUCs • Major Basins • Texas Precipitation • ADMINISTRATIVE • Ground water conservation districts • Regional water planning areas • River authorities • Counties

  11. GLO • http://www.glo.state.tx.us/gis/ • Available Data (for Texas): • County boundaries • Hydrography • Roads • Places, names and populations • Shorelines • Urban areas • City Boundaries • Vegetation areas • Energy resource data • Oil and Gas pipeline • Coastal/Oil Spill Response data • Coastal management program data, etc.

  12. USGS • http://edcdaac.usgs.gov/gtopo30/hydro/ • Hydrologic Datasets for the whole world • Resolution: 30 arc-second (1 km) • Datasets: • Raster: DEM, Flow direction, Flow Accumulation, Slope, Aspect, Compound topographic index • Vector: Streams, Drainage basins

  13. NASA • http://www.nasa.gov/home/index.html • Available Data: • Remotely Sensed Meteorological Data

  14. ESRI • http://arcdata.esri.com/data/tiger2000/tiger_download.cfm • Available data: • Census • Congressional districts • Land marks • Hydrography • Rails • Roads

  15. NCDC • http://www.ncdc.noaa.gov/oa/ncdc.html • Available Data: • Precipitation • Temperature • Wind

  16. USGS • http://waterdata.usgs.gov/nwis • Real time and historic data for: • Surface water • Ground water • Water quality

  17. Other Sources • http://data.geocomm.com/catalog/US/index.html • 10 m resolution DEM • Available only for some areas

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