New Imagery Available for West and South Texas Border Region

Image: 

High resolution aerial imagery are now available for the Lower Rio Grande Valley (LRGV) and portions along the Texas/Mexico border. The imagery acquisition was initiated by the International Boundary and Water Commission (IBWC) and expanded to include nine (9) local LRGV cooperating partners: Brownsville Public Utilities Board, Hidalgo County Appraisal District, Laguna Madre Water District, and the Cities of Alton, Edinburg, McAllen, Pharr, Port Isabel, and San Benito. Tetra Tech, Inc. was selected under an IBWC contract as the data provider, and TNRIS assisted in coordination between the local partners and IBWC.

The aerial imagery were acquired between December 2010 and April 2011 during leaf-off conditions.

Orthoimagery quality review was performed by TNRIS for the areas funded by the LRGV partners.

Acquisition Areas

Products

• GeoTIFFs and SIDs
• Indices per delivery area SHPs
• Frame dates SHP
• Metadata per image tile XMLs

Product Specifications

• 6 inch pixel resolution
• 3-band natural color; color infrared are available for an area covering Alton, TX & northern McAllen, TX
• UTM NAD83 projection, Zones 13 & 14
• Units in meters
• Digital 4-band capture
• File structure is 1,500m x 1,500m US National Grid (USNG) tiles
• Compiled to meet an accuracy of 1 foot RMSE or 1.73 feet accuracy at 95% confidence level. (+/- .3 meter (1 foot) horizontal accuracy stated in IBWC specification.)

Data Access

Orthoimagery are accessible through the TNRIS Imagery WMS > WEB MAPPING SERVICES tab.
Image Catalog Names:
LRGV 2011 6in NC z14
LRGV 2011 6in CIR z14
IBWC 2011 6in NC z13
IBWC 2011 6in NC z14

Orthoimagery products listed above are available for cost of reproduction through TNRIS.