2013 USACE NCMP Topobathy Lidar: Maui (HI) - LMSL

These files contain classified topo/bathy lidar data. Data are classified as 1 (valid non-ground topographic data), 2 (valid ground topographic data), and 29 (valid bathymetric data). Classes 1 and 2 are defined in accordance with the American Society for Photogrammetry and Remote Sensing (ASPRS) classification standards. These data were collected by the Coastal Zone Mapping and Imaging Lidar (CZMIL) system. CZMIL integrates a lidar sensor with simultaneous topographic and bathymetric capabilities, a digital camera and a hyperspectral imager on a single remote sensing platform for use in coastal mapping and charting activities. Native lidar data is not generally in a format accessible to most Geographic Information Systems (GIS). Specialized in-house and commercial software packages are used to process the native lidar data into 3-dimensional positions that can be imported into GIS software for visualization and further analysis.

Horizontal positions, provided in decimal degrees of latitude and longitude, are referenced to the North American Datum of 1983 National Adjustment of 2011 (NAD83 PA11). Once converted to orthometric heights, the data are then adjusted to the Local Mean Sea Level (LMSL).

The 3-D position data are sub-divided into a series of LAS files, which are tiled into quarter-quads or 5km boxes. In addition to the lidar point data, Digital Elevation Models (DEMs), created from the lidar point data are also available. DEMs were created from all classes of points (1, 2, 29) at a 1 meter grid size and bare earth DEMs were created from the ground and bathymetric data classes (2, 29) at a 1 meter grid size. These products have not been reviewed by the NOAA Office for Coastal Management (OCM) and any conclusions drawn from the analysis of this information are not the responsibility of NOAA or OCM. The data are available upon request via email at: coastal.info@noaa.gov.

These data were collected as a part of the NCMP to depict the elevations above and below the water in the Hawaii coastal zone.

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A footprint of this data set may be viewed in Google Earth at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/msl/5032/supplemental/hi2013_usace_ncmp_maui_lmsl_m5032.kmz

LAS 1.2 format (classes 1,2,29)

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Any conclusions drawn from the analysis of this information are not the responsibility of JALBTCX, 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=5032;

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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.

These data are not attributed. | Quantitative Value: N/A | Quantitative Test Explanation: These data are not attributed.

Topo data - Compiled to meet 1 m @ 95% confidence level. Bathy data - compiled to meet 3.5 + 0.05*d m @ 95% confidence level (d is depth).

Topo data - 19.6 cm @ 95% confidence level (10 cm RMSE). Bathy shallow FOV data - SQRT((0.25^2)+((0.0075d)^2)) m at @ 95% confidence level. Bathy deep FOV data - SQRT((0.30^2)+((0.013d)^2)) m @ 95% confidence level (d is depth).

This data set covers the spatial extent of topographic lidar data obtained during this survey.

During inspection and QC of the lidar point cloud, flightline to flightline elevation differences met the CZMIL sensor specifications.