Transcript Hydrologic Analysis

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.
Different agencies develop and/or make available
digital spatial data.
NCRS
NRCS: National Resources Conservation
Service
STATGO: State Soil Geographic
Database
http://www.ftw.nrcs.usda.gov/stat_dat
a.html
Scale: 1:250,000
SSURGO: Soil Survey Geographic
Database
http://www.ftw.nrcs.usda.gov/ssur_dat
a.html
More detailed than STATSGO
Scale: Between 1:12,000 and 1:63,360
USGS
http://seamless.usgs.gov/vi
ewer.htm
Resolution: 30 m
Available datasets
NED: National Elevation
Dataset (30 m)
NLCD: National Land Cover
Dataset (1992, 2001)
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
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)
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
TCEQ
http://www.tceq.state.tx
.us/index.html
Available Data:
Digital raster graphs
(DRGs)
Monitoring sites
Permit sites
Waste sites
TNRIS
http://www.tnris.state.tx.
us/digital.htm
Available Data:
Roads
Hydrography
Vegetation
DOQQs
County boundaries
http://www.twdb.state.tx.u
s/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
TWDB
http://www.glo.state.tx.us/g
is/
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.
GLO
USGS
http://edcdaac.usgs.gov/gtopo3
0/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
NASA
http://www.nasa.gov/hom
e/index.html
Available Data:
Remotely Sensed
Meteorological Data
ESRI
http://arcdata.esri.com/
data/tiger2000/tiger_do
wnload.cfm
Available data:
Census
Congressional districts
Land marks
Hydrography
Rails
Roads
NCDC
http://www.ncdc.noaa.g
ov/oa/ncdc.html
Available Data:
Precipitation
Temperature
Wind
USGS
http://waterdata.usgs.g
ov/nwis
Real time and historic
data for:
Surface water
Ground water
Water quality
Other Sources
http://data.geocomm.com
/catalog/US/index.html
10 m resolution DEM
Available only for some
areas