City of Georgetown 2015 50 cm

Date(s): Coverage Availability/Geographic Extent: Footprint: Source(s):
2015 City of Georgetown and surrounding area, Williamson County, Texas 1/64 USGS Quadrangle City of Georgetown

Data Access

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City of Georgetown 2015 50 cm 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: 5ft Contours
Known Issues: None
Recommended Uses: Basemap, Research, Analysis
Spatial Reference:

EPSG 2277

Description

Partners Engineering, LLC, on behalf of the City of Georgetown, chose Sanborn to plan, implement, and collect Light Detection and Ranging (Lidar) data to acquire detailed surface elevation data for use in conservation planning, design, research, floodplain mapping, and to update their previous Lidar surface for 224 square miles of Georgetown Texas.

  • Projection: UTM Zone 14 North.
  • Horizontal datum: North American Datum of 1983 (NAD83(2011)).
  • Vertical datum: North American Vertical Datum of 1988 (NAVD88) using the latest geoid (Geoid12a) for converting ellipsoidal heights to orthometric heights.
  • Units: meters (to 1cm) Point density- 4 points per square meter.

This data is for planning purposes only and should not be used for legal or cadastral purposes. Any conclusions drawn from analysis of this information are not the responsibility of Sanborn Map Company. Users should be aware that temporal changes may have occurred since this dataset was collected and some parts of this dataset may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of its limitations.

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
Lidar Breaklines: Download File