2001 Harris County, Texas Lidar
This data set was received by the NOAA Coastal Services Center from the Texas Natural
Resources Information System. The data was collected in October of 2001 by Terrapoint
USA, Inc. using an Airborne LIDAR Topographic Mapping System (ALTMS). Flight altitude
was approximately 915 meters, creating a data swath of approximately 550 meters. The
surface elevation value accuracy is better than 15 centimeters. The lidar points are
Cite this dataset when used as a source.
|Search and Download
|| Distributor information not available
| Point of Contact
||Harris County Flood Control District
Documentation links not available.
- Harris County Flood Control District (HCFCD)
|Data Presentation Form:
|| Digital image
|Dataset Progress Status
|Data Update Frequency:
|| Not planned
||This data was acquired for use in the Tropical Storm Allison Recovery Project (TSARP).
||2001-10-07 to 2001-11-05
|Spatial Reference System:
|Spatial Bounding Box Coordinates:
|Spatial Coverage Map:
- Harris County
| Use Constraints
|| No constraint information available
|| Fee information not available.
|| Lineage statement not available.
- Terrapoint USA, Inc.
- DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department
| Processing Steps
- The lidar data was collected by Terrapoint USA, Inc. for the Harris County Flood Control
District. The data was collected in October of 2001 using an Airborne LIDAR Topographic
Mapping System (ALTMS). Flight altitude was approximately 915 meters, creating a data
swath of approximately 550 meters.
- The NOAA Coastal Services Center (CSC) received the files in ASCII format. The data
were in Texas State Plane Projection ADSZone 5401 (Texas South Central), NAVD88 vertical
datum and the vertical units of measure were feet. CSC performed the following processing
to the data to make it available within Digital Coast: 1. The data were converted
from Texas State Plane East, ADSZone 5401 (Texas South Central) coordinates to geographic
coordinates. 2. The data were converted from NAVD88 (orthometric) heights to GRS80
(ellipsoid) heights using Geoid99. 3. The vertical unit of measure for the data was
converted from feet to meters. 4. The LAS data were sorted by latitude and the headers
- The NOAA National Geophysical Data Center (NGDC) received lidar data files via ftp
transfer from the NOAA Coastal Services Center. The data are
currently being served via NOAA CSC Digital Coast at http://www.csc.noaa.gov/digitalcoast/.
The data can be used to re-populate the system. The data are archived in LAS
or LAZ format. The LAS format is an industry standard for LiDAR data developed by
the American Society of Photogrammetry and Remote Sensing (ASPRS); LAZ is a loseless
compressed version of LAS developed by Martin Isenburg (http://www.laszip.org/). The
data are exclusively in geographic coordinates (either NAD83 or ITRF94). The data
are referenced vertically to the ellipsoid (either GRS80 or ITRF94), allowing for
the ability to apply the most up to date geoid model when transforming to orthometric
Metadata Last Modified: 2013-05-07
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