StratMap 2011 50cm Bell, Burnet, McLennan Lidar

Date(s): Coverage Availability/Geographic Extent: Footprint: Source(s):
2011 Bell, Burnet, McLennan 1/16 USGS Quadrangle TNRIS

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StratMap 2011 50cm Bell, Burnet, McLennan Lidar is in the public domain and available from the Research and Distribution Center for the cost of reproduction.

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Data Details

Category:
Lidar
Available Formats: LAS
Alternative Data: 1M Hydro-Enforced DEM, 3D Breaklines
Derivative Data: 5ft Contours
Known Issues: None
Recommended Uses: Basemap, Research, Analysis
Spatial Reference:

EPSG 26914

Description

The project area is 802 DOQQQ tiles covering approximately 3241 square miles in the central region of Texas. The project design of the Lidar data acquisition was developed to support a nominal post spacing of 4 points per square meter. The dates of acquisition were from February 4, 2011 to March 5, 2011. A Leica ALS50 phase II+ and a Leica ALS60 Lidar sensor (Gonzales Block) were used collecting multiple return x, y, and z data as well as intensity data. Lidar data was processed to achieve a bare ground surface.

Lidar data is remotely sensed high-resolution elevation data collected by an airborne collection platform. Using a combination of laser range finding, GPS positioning and inertial measurement technologies, Lidar instruments are able to make highly detailed Digital Elevation Models (DEMs) of the earths terrain, man-made structures and vegetation.

The purpose of this project is to collect and deliver topographic elevation point data derived from multiple return light detection and ranging (Lidar) measurements for north region in Texas. The elevation data will be used as base data for Texas flood plain mapping.

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
Project Report(s): Download File