StratMap 2012 50cm TCEQ Dam Safety Sites Lidar

Date(s): Coverage Availability/Geographic Extent: Footprint: Source(s):
2012 Small Portions of Marion, Harrison, Smith, Henderson, Anderson, Ellis, Hood, Johnson, Callahan, Bandera 1/64 USGS Quadrangle TNRIS

Data Access

Data Search & Download

Use our online data search & download to specify the geographic area for which you would like to download this data set.

Launch Download


Custom Ordering

StratMap 2012 50cm TCEQ Dam Safety Sites Lidar is in the public domain and available from the Research and Distribution Center for the cost of reproduction.

Order Data


Data Details

Category:
Lidar
Available Formats: LAS
Alternative Data: 1.5M Hydro-Enforced DEM, 3D Breaklines
Derivative Data: 5ft Contours
Known Issues: None
Recommended Uses: Basemap, Research, Analysis
Spatial Reference:

EPSG 26914

Description

Topographic mapping of eleven small project sites mapped throughout Central and Eastern Texas in April of 2012. Site A consisted of a total of 40 individual tiles. The product covered by this metadata file consists of classified Lidar point clouds in .LAS format, collected with a Trimble Harrier 68i Lidar sensor by SAM, Inc.

The purpose of this Lidar data is to become part of an ongoing data collection by the State of Texas to support mapping and modeling of flood plains, hydrography, and terrain. The data will also be used by the Texas Commission on Environmental Quality (TCEQ) Dam Safety staff in the performance of hydraulic modeling to determine potential areas of inundation downstream of dam structures for inclusion in Emergency Action Plans and to more accurately assess the downstream hazard rating.

This dataset was acquired through the High Priority Imagery and Data Sets (HPIDS) contract. The contract was created in 2009 to maximize spending power by coordinating geospatial data purchases to share costs and to ensure that acquired data meet high standards of quality. The successor to HPIDS is the StratMap contract, established in 2015.

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