Data Management Plan (Deprecated)

The data contained in these files contain topographic data collected by the CHARTS system along the northern coast of Hawaii (Big Island), Kauai, Maui, Molokai, and Oahu in the state of Hawaii. The data were collected on the following dates:

Hawaii (Big Island): 20070123-20070210

Kauai: 20070112-20070210

Maui: 20070111-20070127

Molokai: 20070111-20070127

Oahu: 20070112-20070210

The data points representing bare earth have been classified as such using TerraScan with results provided in the classified las files. Classification value "1" means "Unclassified" and a value "2" means "Ground." The data were collected and processed in geographic coordinates and ellipsoid heights. The positions are relative to NAD83 HARN in decimal degrees of longitude and latitude. The heights were converted from ellipsoid to geoid (NAVD88) heights using the Geoid03 model with the results in meters. These heights were then adjusted to Mean Sea Level.

Process Steps:

• 2007-11-14 00:00:00 - These data were collected using the CHARTS surveys system. It is owned by the Naval Oceanographic Office and Operated through contract. The system collects topographic lidar data at 20 kHz and hydrographic data at 3 kHz. The system also collects RGB imagery at 1Hz. A CASI-1500 hyperspectral line scanner is integrated with the system as well. Aircraft position, velocity and acceleration information are collected through a combination of Novatel and POS A/V equipment. Raw data are collected and transferred to the office for downloading and processing in SHOALS GCS software. GPS data are processed using POSPac software and the results are combined with the lidar data to produce 3-D positions for each lidar shot. These data are edited using Fledermaus software where anomalous data are removed from the dataset. The edited data are written to the national grid system 1 km tiles using chartsLAS, a program written by NAVO. The data are converted from ellipsoid to orthometric heights, based on the GEOID03 model, within the chartsLAS program. The LAS files output from chartsLAS were read into TerraScan and filters were applied to classify ground points. Points designated as ground are assigned a classification value "2" and all other points are assigned the classification value "1" which represents an unclassified state.
• 2010-10-01 00:00:00 - The NOAA Office for Coastal Management (OCM) received files in LAS format. The files contained LiDAR intensity and elevation measurements. While the processing steps from USACE above do not specify how the data were converted to mean sea level, the abstract received indicates that this was done. It is believed that a single offset was applied per island based upon information from the tide stations on that island. OCM performed the following processing on the data for storage purposes and to make it available within Digital Coast: 1. The data were left in the tidal vertical datum and the Geotiff tags were updated to reflect NAD83(HARN) and Local Mean Sea Level. No vertical transforms will be performed on this data during provisioning. (Citation: 2007 HI Hawaii CHARTS Survey)

This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer;