2008 USACE Great Lakes Topo/Bathy Lidar: Wisconsin

These files contain topographic and bathymetric lidar data collected by the Compact Hydrographic Airborne Rapid Total Survey (CHARTS) system

along the coast of Wisconsin. 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). 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. Horizontal positions, provided in

decimal degrees of latitude and longitude, are referenced to the North American Datum of 1983 (NAD83). Vertical positions are referenced to the NAD83

ellipsoid and provided in meters. The National Geodetic Survey's (NGS) GEOID03 model is used to transform the vertical positions from ellipsoid to

orthometric heights referenced to the North American Vertical Datum of 1988 (NAVD88). The 3-D position data are sub-divided into a series of ASCII

file products, with each covering approximately 5 kilometers of shoreline. The file index is provided by the shape file, "wi_michigan.shp", and the

numbers used to identify files are in the "Box" field of the shape file. The data file naming convention is based on the year, project, area name,

"Box" number and product type (topographic or bathymetric). An example file name is "2008_NCMP_WI_Michigan_01_TL.xyz", where 2008 is the year of data

collection, NCMP is the project under which data were collected, WI_Michigan is the area of data collection, 01 is the "Box" number and H, TF, or TL

is the product type. The ASCII columns are Longitude, Latitude, UTM Zone, Easting, Northing, Elevation (orthometric), Elevation (ellipsoid), Date,

Time, and Intensity.

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 NCMP to depict the elevations ABOVE AND/OR BELOW the water for the First Return OR Last Return OR Hydro

in the Wisconsin coastal zone.

10714

High water turbidity in the survey area hindered the acquisition of bathymetric data in boxes 61, 62, and 64 and resulted in incomplete coverage.

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

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/564/supplemental/2008_USACE_GreatLakes_TopoBathy_Lidar_Wisconsin_LakeMichigan.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 9.3.1.1850

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 +/- 0.75m.; 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 +/- 0.20m.; 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.