2010 Great Lakes Restoration Initiative Bathymetric Lidar: Lake Superior

The data contained in this file contain hydrographic and topographic data collected by the Fugro LADS Mk II system along the Lake Superior coast

of Minnessota, Wisconsin and Michigan. FLI was contracted under Fugro Earth Data Inc (FEDI) by NOAA Office for Coastal Management (OCM) to collect

data under the Great Lakes Restoration Initiative.

All point data has delivered is in LAS 1.2 format

The file has been classified so that all points are classified as first return or bare earth

First return points include all vegetation, buildings or other feature with fixed position

Bare earth points exclude vegetation, buildings, piers, jetties, nav aids, bridges and any other fixed man made feature. Except for break waters

and retaining walls along the shore line.

Original contact information:

Contact Org: Fugro LADS Inc

Title: Project Manager

Phone: +1 228 818 8390

Email: ladsusa@fugrolads.com

This data was collected as part of the Great Lakes Restoration Initiative (GLRI), an inter-agency initiative lead by the Environmental Protection

Agency (EPA) targeting areas with the most significant problems in the Great Lakes region.

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Data extends off shore from the shoreline to extinction depth or 1km, which ever is closer.

Data extends onshore from the shoreline to 30m.

Gaps in Bathymetry can be attributed to turbid water, glassy lake surfaces, boats, extinction depths

Gaps in bathymetry were reflown multiple times to attempt full bottom coverage.

Gaps in Topography occur where data collected was rejected due to significant datum errors after long sections of over land.

These areas were attempted multiple times.

The Lidar Collection Survey Report for this data set may be viewed at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/586/supplemental/2010_GLRI_Survey_Report.pdf

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

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/586/supplemental/2010_GLRI_Bathymetric_Lidar_Lake_Superior.kmz

Any conclusions drawn from the analysis of this information are not the responsibility of 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. Not for navigational use.

FLI Ground System L3.3.

CARIS Hips/Sips 7.0.2

CARIS Base Editor 2.3.0

Global Mapper 11.02

Grafnav 8.10

Fugro Workbench 4.01.08.00

ESRI ArcGIS 9.3.1

The data positions were obtained using post processed KGPS methods. The horizontal accuracy of the data is better than +/- 3m.; Quantitative Value: 3.0 meters, Test that produced the value: 2 sigma

The data positions were reduced to IGLD85 using water level gauges in proximity to the data collection areas. In order to transform the data to

ellipsoid heights an intermediate step of vertically transforming the data from IGLD85 to NAVD88 was completed. There was a 0.025m error

associated with this transformation. The vertical accuracy of the data is better than +/- 0.293m.

; Quantitative Value: 0.293 meters, Test that produced the value: 2 sigma

See Report of Survey

The data in this file were tested against independantly collected ground truth data. At these locations the Lidar data matched vertically within

0.20 meters. Relative checks over crosslines and benchmarks agreed vertically within 0.10 meters.