|Date(s):||Coverage Availability/Geographic Extent:||Footprint:||Source(s):|
|El Paso, Hudspeth||US National Grid||FEMA|
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FEMA 2014 Rio Grande River Lidar is in the public domain and available from the Research and Distribution Center for the cost of reproduction.Order Data
|Alternative Data:||1M Hydro-flattened DEM, 3D Breaklines|
|Derivative Data:||5ft Contours|
|Recommended Uses:||Basemap, Research, Analysis|
FEMA Region 6 TX - Rio Grande and Fort Whitman Watershed QL2 LiDAR project called for the Planning, Acquisition, processing and derivative products of LIDAR data to be collected at a nominal pulse spacing (NPS) of 0.7 meter. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base LIDAR Specification, Version 1. The data was developed based on a horizontal projection/datum of NAD83, UTM Zone 13, Meters and vertical datum of NAVD1988 (GEOID12A), Meters. LiDAR data was delivered in RAW flight line swath format, processed to create Classified LAS 1.2 Files formatted to 6 individual 1500m x 1500m tiles for the pilot (995 individual 1500m x 1500m tiles), and corresponding Intensity Images and Bare Earth DEMs tiled to the same 1500m x 1500m schema, and Breaklines in Esri shapefile format.
Ground Conditions: LiDAR was collected in Fall 2014, while no snow was on the ground and rivers were at or below normal levels. In order to post process the LiDAR data to meet task order specifications, Photo Science established a total of 30 QA calibration control points and 80 Land Cover control points that were used to calibrate the LIDAR to known ground locations established throughout the Rio Grande and Fort Whitman Watershed project area.
Lidar data for Texas is made available online through the use of data compression using LASTools. LASTools is an open-source collection of tools for lidar data viewing and manipulation. TNRIS uses the LASzip portion of LASTools for compression\decompression. LASTools provides a lossless compression of the data from las to laz formats.