2007 US Army Corps of Engineers (USACE) National Coastal Mapping Program (NCMP) Topobathy
Lidar - Michigan (Lake Huron shoreline)
This kmz file shows the extent of coverage for the 2007 USACE Michigan Lake Huron
Topo/Bathy lidar data set.
This is a bare earth data set. The data contained in these files contain hydrographic
and topographic data collected by the CHARTS system along the Lake Huron coast of
Michigan from August 25 - September 26, 2007. The data were collected and processed
in geographic coordinates and ellipsoid heights. The positions were relative to NAD83
in decimal degrees of longitude and latitude. The heights were converted from ellipsoid
to orthometric heights (NAVD88) using the Geoid03 model with the results in meters.
For data storage and provisioning purposes, the NOAA Coastal Services Center converted
the data from NAVD88 heights to ellipsoid heights using GEOID03. CHARTS integrates
topographic and bathymetric lidar sensors, a digital camera, and a hyperspectral scanner
on a single remote sensing platform for use in coastal mapping and charting activities.
Data coverage generally extends along the coastline from the waterline inland 500
meters (topography) and offshore 1,000 meters or to laser extinction (bathymetry).
The topographic lidar sensor has a pulse repetition rate of 9 kHz at 1064 nm (near-infrared
wavelength). The bathymetric lidar sensor has a pulse repetition rate of 1 kHz at
532 nm (green wavelength). Native lidar data is not generally in a format accessible
to most Geographical 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.
Cite this dataset when used as a source.
|Search and Download
|| Distributor information not available
| Point of Contact
Documentation links not available.
|Data Presentation Form:
|| Digital image
|Dataset Progress Status
|Data Update Frequency:
|| As needed
||These data covered the required survey area with minimal gaps in data coverage except
boxes 16-27. There is no topo data covering these areas.
||These data were collected as a part of the National Coastal Mapping Program (NCMP)
to depict the elevations above the water for the last return in the Michigan coastal
||2007-08-25 to 2007-09-26
|Spatial Reference System:
|Spatial Bounding Box Coordinates:
|Spatial Coverage Map:
- Last Return
- U.S. Army Corps of Engineers, Mobile District
- United States
- Lake Huron
| Use Constraints
|| No constraint information available
|| Fee information not available.
|| Lineage statement not available.
- DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department
| Processing Steps
- 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 data are converted
from ellipsoid to orthometric heights, based on the GEOID03 model, within the chartsLAS
- The NOAA Coastal Services Center (CSC) received unclassified files in las format.
The files contained LiDAR intensity and elevation measurements. CSC performed the
following processing on the data for data storage and Digital Coast provisioning:
1. The data were bare-earth classified using MARS Explorer 6.1 software. 2. The data
were converted from NAVD88 heights to ellipsoid heights using Geoid03. 3. The LAS
header fields were sorted by latitude and updated.
- 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: 2013-06-07
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