Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Geodetic Survey (NGS), Remote Sensing Division
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office for Coastal Management (OCM)
20170315
2016 NOAA NGS Topobathy Lidar DEM: Key West (FL)
Charleston, SC
NOAA's Ocean Service, Office for Coastal Management (OCM)
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=3266
https://coast.noaa.gov/htdata/raster2/elevation/NGS_FL_key_west_DEM_2016_6366
https://coast.noaa.gov/dataviewer
https://coast.noaa.gov/dataregistry
https://coast.noaa.gov
These data were collected by the National Oceanic Atmospheric Administration National Geodetic Survey Remote Sensing Division using a Riegl VQ820G system. The data were acquired from 20160419 - 20160425. The data includes topobathy data in an LAS 1.2 format file classified as 1 - unclassified, 2 - ground, 7 - topo noise, 26 - bathymetric bottom or submerged topography, 27 - water surface, 28 - submerged object and 30 - International Hydrographic Organization (IHO) S-57 objects. A digital elevation model was then derived from the lidar points.
This lidar data are an ancillary product of NOAA's Coastal Mapping Program (CMP), created through a wider Integrated Ocean and Coastal Mapping initiative to increase support for multiple uses of the data. It is not intended for mapping, charting, or navigation. In addition, it will be used for ongoing research efforts for testing and developing standards for airborne lidar.
Data include all lidar returns. Outliers or false returns (e.g., returns from birds, atmospheric particles, and/or system noise) may be present in the data. An automated ground classification algorithm was used to determine bare earth point classification. It should be noted that not all returns were correctly classified; therefore the user should examine for acceptability.
20160419
20160425
ground condition
None planned
-81.864
-81.669
24.743
24.448
ISO 19115 Topic Category
elevation
None
Bathymetry/Topography
Bathymetry
Topography
LiDAR
CoRIS Discovery Thesaurus
Geographic Information > LiDAR
CoRIS Theme Thesaurus
EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry
EARTH SCIENCE > Land Surface > Topography> Terrain Elevation
NOAA NOS Harvest Catalog
CoRIS
None
United States
Florida
CoRIS Place Thesaurus
OCEAN BASIN > Atlantic Ocean > Gulf of Mexico > Florida
COUNTRY/TERRITORY > United States of America > Florida
None
20160419
20160425
None
Users should be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations.
National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Geodetic Survey (NGS), Remote Sensing Division
Chief, Remote Sensing Division
mailing and physical
1315 East West Highway, N/NGS3
SSMC-3 8142
Silver Spring
MD
20910
USA
301-713-2663
https://coast.noaa.gov/htdata/lidar2_z/geoid12b/data/6246/supplemental/fl2016_ngs_topobathy_key_west_m6246.kmz
This graphic shows the lidar footprint for the 2016 NOAA NGS topobathy lidar project of Key West in Florida.
kmz
We request that you credit the National Oceanic and Atmospheric Administration (NOAA) when you use these data in a report, publication, or presentation.
OS Independent
Not applicable
Data covers the 1620 tiles (500m x 500m tiles).
The data positions were obtained using post processed KGPS methods. The horizontal accuracy of the data is better than plus or minus 1.0 m.
1.0
2 Sigma
The data positions were obtained using post processed KGPS methods. The vertical accuracy of the data is better than plus or minus 0.15 m.
0.15
1 Sigma
Data were processed to an initial LAS format using the Riegl RiProcess software. The Applanix POSPac software was utilized for GPS and inertial processing, and GeoCue, Terrasolid, and LP360 software for data visualization, 3D editing, and export to final LAS file. Data were processed in NAD83 horizontal and vertical datum.
20170201
The NOAA Office for Coastal Management (OCM) received files in las format. The files contained lidar elevation and intensity measurements of Key West, Florida. The data were in UTM Zone 17 coordinates and ellipsoid elevations in meters. The data classifications for the data are: 1 - unclassified, 2 - ground, 7 - topo noise, 26 - bathymetric bottom or submerged topography, 27 - water surface, 28 - submerged object and 30 - International Hydrographic Organization (IHO) S-57 objects. OCM performed the following processing on the data for Digital Coast storage and provisioning purposes: 1. Eliminated elevation outliers below -150 meters ellipsoid height; 2. Converted from UTM Zone 17 to geographic coordinates; 3. Sorted by gps time; 4. Reclassified data class 29 to 28; 5. Compressed the data using laszip.
20170213
The NOAA Office for Coastal Management used the point cloud data to derive a digital elevation model (DEM) for the area. The DEM was created by using the ground and bathy points processed through these steps: 1) reprojected to UTM zone 17 coordinates and orthometric heights via geoid12b; 2) retiled with a buffer using lastile from LAStools; 3) tiles rasterized with las2dem from LAStools; 4) tiles mosaiced into a single DEM with gdalbuildvrt and gdal_translate.
20170821
Raster
Universal Transverse Mercator
17
0.999600
-81.000000
0.000000
500000.000000
0.000000
coordinate pair
1.0
1.0
meters
North American Datum of 1983 (2011)
GRS80
6378137
298.257222101
North American Datum of 1983 (2011; Geoid12b)
0.000100
meters
Explicit elevation coordinate included with horizontal coordinates
NOAA Office for Coastal Management
mailing and physical
2234 South Hobson Avenue
Charleston
SC
29405-2413
USA
(843)740-1202
coast.info@noaa.gov
Downloadable Data
Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the National Geodetic Survey, the Office for Coastal Management, or its partners.
This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6366
20170822
NOAA Office for Coastal Management
mailing and physical
2234 South Hobson Avenue
Charleston
SC
29405-2413
US
843-740-1202
coastal.info@noaa.gov
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998