|Date(s):||Coverage Availability/Geographic Extent:||Footprint:||Source(s):|
|2008||All of Harris county and portions of Brazoria, Chambers, Fort Bend, Galvestion, Grimes, Montgomery and Waller.||1/4 USGS Quadrangle||HGAC(vendor: Merrick & Company)|
|Alternative Data:||1M Hydro-Enforced DEM, 3D Breaklines|
|Derivative Data:||1ft and 5ft Contours|
|Recommended Uses:||Research, Analysis|
The Houston-Galveston Area Council contracted with Merrick & Company to fly 3,695 square mile project area. The purpose of the data was for numerous GIS applications including flood modeling and prevention. Lidar was collected using Merrick's ALS50 Phase 2 sensor. The The raw data was verified in MARS software for complete coverage of the project area, and boresighted to align the flightlines. These tiles were then processed through automated filtering that separates the data into different classification groups: unclassified points, ground points and water. The data was next taken into MARS to reclassify the erroneous points that may remain in the LIDAR point cloud after auto filter.