USGS 2008 120cm

Date(s): Coverage Availability/Geographic Extent: Footprint: Source(s):
2008 Kleberg, Kenedy USGS 1k Grid USGS

Data Access

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USGS 2008 120cm is in the public domain and available from the Research and Distribution Center for the cost of reproduction.


Data Details

Category:
Lidar
Available Formats: LAS
Alternative Data: 1M Hydro-Enforced DEM, 3D Breaklines
Derivative Data: None
Known Issues: Only bare earth returns available. Bare earth returns are classified as 6 instead of 2.
Recommended Uses: Basemap, Research, Analysis
Spatial Reference:

EPSG 26914

Description

This Texas Coastal Light Detection and Ranging (Lidar) Task Order is to provide high accuracy bare-earth processed, raw point cloud return data, and gridded Lidar data, for approximately 2388 square miles consisting of the Texas counties of Kleberg and Kennedy.

The project consisted of acquisition, post-processing, and classification of Lidar data. The classified bare-earth data achieves the following: nominal horizontal spacing of 1.2 meters based on the Universal Transverse Mercator, Zone 14, related to the North American Datum of 1983 (NSRS2007). Vertical accuracy was to achieve no more than 18.0 centimeters or better relative to the North American Vertical Datum of 1988. Accuracy statement is based on the area of moderate to flat terrain. Diminished accuracies are to be expected in areas in dense vegetation.

The accuracy of the Lidar data as tested met the vertical accuracy of 18.0 centimeters or less standards, however, derived products may be less accurate in areas of dense vegetation due to a lesser number of points defining the bare-earth in these areas.

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.

  • Software with native LAZ support
  • ERDAS IMAGINE (14.1 and up) by Hexagon Geospatial
  • Global Mapper (13.1 and up) by Blue Marble Geo
  • ENVI LiDAR (5.1 and up) by Exelis VIS
  • FME (2012 and up) by Safe Software
  • LAStools by rapidlasso
  • plas.io 3D Web Viewer by Hobu Inc.
  • FUSION (3.40 and up) by Bob McGaughey of the USDA
  • Voyager (1.3 and up) by Voyager GIS
  • GRASS GIS (7.0 and up) by Open Source Geospatial Foundation (OSGeo)

Supplemental Information

Tile Index: Download File
Lidar Breaklines: Download File