Orthoimagery is digital aerial photography that has been geometrically corrected (orthorectified) to remove distortion caused by camera optics, aircraft tilt, and differences in ground elevation.
The publicly available statewide orthoimagery datasets from TNRIS have either 0.5-meter or 1-meter pixel resolution. This level of image detail is used to identify current conditions, features, and changes on the ground serving as a base of reference for other map information.
Continue reading to see all are our available StratMap orthoimagery datasets
Leveraging funds from multiple government agencies (State, Federal, and Local), the StratMap Program coordinated statewide orthoimagery acquisitions starting in the mid-1990s which also began the Texas Orthoimagery Program (TOP).
Since then, the state has been refreshed with new orthoimagery in 2004 at 1-meter, 2008/09 at 0.5-meter (under TOP) & 1-meter, and 2010 at 1-meter, all in conjunction with the National Agriculture Imagery Program (NAIP) administered by the USDA-Farm Service Agency-Aerial Photography Field Office.
The USDA NAIP continues to refresh Texas statewide with new orthoimagery every two years at 1-meter pixel resolution (2012, 2014, 2016) during the leaf-on growing season (April – October acquisitions).
Pooling State funds again in 2014, StratMap coordinated a new TOP statewide 0.5-meter leaf-off acquisition that occurred during the 2014/15 (91% of state) & 2015/16 (9% of state) winter seasons.
Since 2009, the StratMap Program has coordinated numerous higher resolution (6-inch/1-foot) orthoimagery regional acquisition projects within Texas. Our contracting vehicle, the StratMap Contracts process, provides an efficient way to procure new orthoimagery from a list of prequalified geospatial data product and services vendors.