gis-data sources
DESCRIPTION
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. - PowerPoint PPT PresentationTRANSCRIPT
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GIS-Data Sources
Francisco Olivera, Ph.D., P.E.Srikanth Koka
Department of Civil EngineeringTexas A&M University
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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.
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NCRSNRCS: National Resources Conservation Service
STATGO: State Soil Geographic Database
http://www.ftw.nrcs.usda.gov/stat_data.htmlScale: 1:250,000
SSURGO: Soil Survey Geographic Database
http://www.ftw.nrcs.usda.gov/ssur_data.htmlMore detailed than STATSGOScale: Between 1:12,000 and 1:63,360
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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)
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USGShttp://nhd.usgs.gov/
NHD: National Hydrographic Dataset
Vector data containing surface water features like streams, lakes, ponds, springs, etc.
Scale: 1:100,000
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USGShttp://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)
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BTShttp://www.bts.gov/gis/ntatlas/networks.html
Available dataNational ParksState BoundariesAirportsAmtrak StationsU.S. Army Corps of Engineers Ports U.S. Corps of Engineers Navigable Waterway Nodes Hydrographic Features metadataNational Highway Planning NetworkRailway Network U.S. Corps of Engineers Navigable Waterway Network
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TCEQ
http://www.tceq.state.tx.us/index.html
Available Data:Digital raster graphs (DRGs)Monitoring sitesPermit sitesWaste sites
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TNRIS
http://www.tnris.state.tx.us/digital.htm
Available Data:
RoadsHydrographyVegetationDOQQsCounty boundaries
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TWDBhttp://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
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GLOhttp://www.glo.state.tx.us/gis/
Available Data (for Texas):County boundariesHydrographyRoadsPlaces, names and populationsShorelinesUrban areasCity BoundariesVegetation areasEnergy resource dataOil and Gas pipeline Coastal/Oil Spill Response data Coastal management program data, etc.
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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 indexVector: Streams, Drainage basins
USGS
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NASA
http://www.nasa.gov/home/index.html
Available Data:Remotely Sensed Meteorological Data
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ESRIhttp://arcdata.esri.com/data/tiger2000/tiger_download.cfm
Available data:CensusCongressional districtsLand marksHydrographyRailsRoads
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NCDC
http://www.ncdc.noaa.gov/oa/ncdc.html
Available Data:PrecipitationTemperatureWind
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USGShttp://waterdata.usgs.gov/nwis
Real time and historic data for:
Surface waterGround waterWater quality
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Other Sources
http://data.geocomm.com/catalog/US/index.html
10 m resolution DEM
Available only for some areas