Download and Access Products:

Point Cloud Data	Bulk Download	opentopoID: OTLAS.082020.6343.1
Raster (C1-2)	Bulk Download	opentopoID: OTSDEM.082020.6343.1
Raster (C1-2-3)	Bulk Download	opentopoID: OTSDEM.082020.6343.1b

Collection Overview:

This lidar dataset was collected as part of an NCALM Rapid Response Project for Inci Gunerlap at Texas A&M University. Data collection covers and area of ~69 km² along the Mission River in Refugio, Texas after Hurricane Harvey.

Note: this project utilized three laser channels during its data collection. Each of the returns contained on the LAS tiles are encoded with a laser channel value. The values used are 1 (1550 nm), 2 (1064 nm), and 3 (532 nm), and are stored in the "User Data" record of the Point Data records in the LAS file.

This data collection also contains hyperspectral images that are 72 Band, 1.5 m pixel size, in PCIDSK (.PIX) format. The digital number in the PIX image corresponds to milli-SRU (spectral radiance units). One SRU is equivalent to one microwatt per square-centimeter per steradian per nanometer. Files are provided as individual flight strips as well as a single mosaic file of flight strips. These images can be downloaded here

The pre-computed Raster products are split into two separate landing pages: C1-2, and C1-2-3.

Pre-computed Raster C1-2 contains the following:

• DEM from classified ground returns from Channels 1 and 2 (IR only)
• DSM from first return from Channels 1 and 2

Pre-computed Raster C1-2-3 contains the following:

• DEM from classified ground and bathymetry returns from all channels
• DSM from first returns from all channels (C1C2C3)
• Water surface grid from point class 39
• Bathymetry grid from point class 9

Publications associated with this dataset can be found at NCALM's Data Tracking Center

Dataset Acknowledgement: Lidar data acquisition and processing completed by the National Center for Airborne Laser Mapping (NCALM). NCALM funding provided by NSF's Division of Earth Sciences, Instrumentation and Facilities Program. EAR-1830734.

Dataset Citation: Guneralp, I. (2020). Post Hurricane Harvey Mapping of the Mission River, Texas 2018.. National Center for Airborne Laser Mapping (NCALM). Distributed by OpenTopography. https://doi.org/10.5069/G9MG7MPD.. Accessed: 2024-12-21       Copied to Clipboard

Use License: CC BY 4.0

Dataset Keywords: lidar, texas, hurricane, harvey, Mission River, Rapid Response, hyperspectral, 532 nm, 1550 nm, 1064 nm

Survey Date: 03/08/2018 - 03/09/2018

Publication Date: 08/26/2020

Data Provider and Roles:
Funder

• National Science Foundation

Collector

• National Center for Airborne Laser Mapping

Principal Investigator

• Inci Guneralp - Texas A&M University

Total number of points: 3,297,558,275 pts

Area: 68.04 km²

Point Density: 48.46 pts/m²

Classifications:

Class 1 - Unclassified	883,840,267
Class 2 - Ground	1,127,679,296
Class 3 - Low Vegetation	49,149,757
Class 4 - Medium Vegetation	200,612,361
Class 5 - High Vegetation	1,012,238,715
Class 6 - Building	12,406,029
Class 9 - Water	4,313,481
Class 38 - Reserved	2,964,296
Class 39 - Reserved	4,354,073

Raster Resolution: 0.5 meter

Coordinate System:
Horizontal: NAD83 (2011) / UTM Zone 14N Meters [EPSG: 6343]
Vertical: NAVD88 (GEOID 12A) [EPSG: 5703]

Units: meter

Survey Report: Reports

LAS Validation Data Report: Reports

Tile index in shapefile format: Download

Dataset Extent in GeoJSON format:
Point Cloud: TX18_Guneralp.geojson
Raster: TX18_Guneralp2C.geojson
Raster: TX18_Guneralp3C.geojson

Dataset Spatial Bounds: North: 28.3216419921909°     South: 28.2139436642488°     East: -97.2402407259092°     West: -97.3141883455766°