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Geo-
database |
Shape-
file |
Meta-
data |
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The
GIS datasets listed below are related to various
types of natural features. Although TWDB utilitizes
this data in our most commonly used maps, some
of the datasets were created and are maintained
by other state and federal agencies. For more
information on individual datasets, please consult
the related metadata. |
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31.07MB |
11.11MB |
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The
9 major aquifers of Texas as defined by the TWDB. UPDATED DECEMBER 2006. |
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Minor Aquifers |
31.07MB |
6.94MB |
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The
21 minor aquifers of Texas as defined by the TWDB. UPDATED DECEMBER 2006. |
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Major River
Basins |
8.93MB |
686KB |
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The
23 major U.S.G.S. river basins of Texas. *These are not
the 'official'TWDB basin boundaries. |
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Hydrologic
Unit Code (HUC) |
2.92MB |
690KB |
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Based
on the USGS national hydrologic 8-digit coding
system. Technically considered 'sub-basins'. |
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Major
Rivers |
1.03MB |
319KB |
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Extracted
from USGS 1:2,000,000 stream dataset. |
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Existing
Reservoirs |
17.49MB |
1.14MB |
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Existing reservoir boundaries
updated using 'NHD' and TWDB Lake survey data. *Updated
December 2007 |
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Texas
Precipitation |
4.14MB |
1.84MB |
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Average
monthly and annual precipitation for the climatological
period 1961-90. *See Metadata. |
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Texas Terrain Color Ramp |
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11.7MB |
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Texas hillshade plus color ramp. |
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Texas Hillshade |
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7.11MB |
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Background image used in statewide
maps. Generated from DEMs. |
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Geo-
database |
Shape-
file |
Meta-
data |
|
Boundaries
for various administrative units including: Regional
Water Planning Areas and Groundwater Conservation
Districts. Administrative
Boundaries are approximate and may not accurately
depict legal descriptions. |
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323KB |
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Groundwater
conservation districts in Texas. This data was acquired from TCEQ.
Dataset is current as of July 2009. |
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3.38MB |
323KB |
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The
16 Water Planning Regions in Texas, as created by TWDB,
updated March 2008. |
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River Authorities and Special Law Districts |
2.54MB |
1.35MB |
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Statutory
boundaries (but not necessarily the service areas) 1999. |
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Priority Groundwater Management Areas (PGMA) |
924KB |
39KB |
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All
5 areas, as designated by TCEQ. |
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12.5MB |
2.84MB |
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New
Groundwater Managment Area boundaries, approved
August 2007. |
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PFCA
Regions and Field Office |
4.93MB |
3.25MB |
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Geographic
area assignments for Regional Project Teams and
Inspection & Field Support Services Offices |
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Existing
Conveyances |
1.39MB |
22KB |
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Existing
interbasin water transfers for the State of Texas.
(Taken from 2002 Water For Texas) |
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Proposed
Conveyances |
1.39MB |
14KB |
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Proposed
water conveyances for the State of Texas. (Taken
from 2002 Water For Texas) |
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Welldata from TWDB
Groundwater Database |
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3.84MB |
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Created
for WIID Water Well Data application [Link
to WIID]. |
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37.7MB |
4.92MB |
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The
following items are not GIS data, but can be useful
when producing maps or viewing our GIS data. |
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TWDB
Logo |
TWDB's
agency logo can be downloaded for inclusion with
official TWDB map products. Image files are zipped. |
|
Disclaimer |
This
text file includes a legal disclaimer to be used
when producing official TWDB map products. |
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Projections |
The
Texas State Mapping System Projection is the
commonly used projection in TWDB maps with Decimal Degrees, NAD83 as the
common spatial representation for GIS datasets. Projection files are zipped. |
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ArcExplorer |
ArcExplorer
is a lightweight GIS data viewer developed by
ESRI. This freely available software offers an
easy way to perform basic GIS functions. |
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NB
Viewer |
A
free, easy to use universal GIS data viewer. NB
Viewer can view .shp, .mif, or .e00 files. |
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