Starting in 2002, the Houston Galveston Area Council (H-GAC) began facilitating, along with the Geographic Data Committee (GDC), the acquisition of aerial imagery for the greater Houston-Galveston region, on a biannual basis.
Specifications
The imagery is tiled according to the lambert grid, with over 1,800 4 sq. mi. tiles.
Over 7,500 sq. mi. are currently covered, including Brazoria, Fort Bend, Galveston, Harris, Montgomery, and Wallis Counties, as well as parts of neighboring counties.
The imagery has a 1 ft. pixel resolution, in MrSID 20:1 compressed format (limited availability of 6 inch resolution).
Images can be viewed with any ArcGIS application, certain AutoCAD applications, or the free LizardTech application, available at
www.lizardtech.com.
The coordinate system for the imagery is State Plane, Texas South Central Zone (FIPS code 4204), Feet, NAD83.
2006 1-Foot Samples (click icon to view larger image)
Coverage Maps
2002 Coverage Map
2004 Coverage Map
2006 Coverage Map
(If you already have Google Earth, click on the Lambert Locator link above and select Open, when prompted. From there you will able to type in the address you are looking for and find which lambert it lies in. If you do not already have Google Earth, you can download it for free at earth.google.com.)
Pricing
- 1-8 lamberts (for FTP download or on CD) $50 each
- 9-15 lamberts (for FTP download or on CD) $35 each
- Full Coverage (on external hard drive) $1,500 (price of 80GB hard drive included)
Frequently Asked Questions