2007 US Army Corps of Engineers (USACE) National Coastal Mapping Program (NCMP) Topobathy Lidar - Michigan (Lake Huron shoreline)

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 Office for Coastal Management 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.

Original contact information:

Contact Org: JALBTCX

Title: Data Production Manager

Phone: 228-252-1111

Email: shoals-info@sam.usace.army.mil

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 zone.

10707

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

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/550/supplemental/2007_USACE_Great_Lakes_TopoBathy_Lidar_Michigan_Lake_Huron.kmz

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;

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.

Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.2.6.1500

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

The data positions were obtained using post processed KGPS methods. The horizontal accuracy of the data is better than +/- 0.75 m.; Quantitative Value: 0.75 meters, Test that produced the value: 1 Sigma

The data positions were obtained using post processed KGPS methods. The vertical accuracy of the data is better than +/- 0.20 m.; Quantitative Value: 0.20 meters, Test that produced the value: 1 Sigma

Not Provided

The data provided in this file were tested against ground truth data. At these locations the lidar data matched within 0.20 meters, and

different flight line data agreed within 0.20 meters.