Raster Data
Information about raster GIS datasets used at TCEQ including aerial imagery (DOQQs) and Digital USGS Topographic Maps (DRGs).
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DOQQ Sample
Displays a sample graphic of a DOQQ (aerial image of Mission Bay)
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Digital Raster Graphics (DRGs)
Describes DRGs, which are scanned images of U.S. Geological Survey (USGS) topographic maps.
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Mission Bay SE DOQQ
Map graphic showing location of the DOQQ sample.
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TCEQ Digital Orthophoto Quarter
Describes TCEQ's 1995 DOQQ (aerial imagery) Acquisition Project
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TCEQ Digital Orthophoto Quarter Quads Numbering Conventions
Demonstrates the USGS Quarter Quad Numbering System.
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