2009 Northwest Florida Water Management District (NWFWMD) Lidar: Leon County

This dataset is part of a regularly scheduled update of planimetric, hydrographic, and topographic features. The dataset was created from source imagery acquired by a Leica ADS40 multispectral scanner and LAS data acquired by a Leica ALS50 Phase I Lidar sensor from January 31, 2009 through February 6, 2009.

Original contact information:

Contact Name: Mr. Greg Mauldin

Contact Org: TLCGIS

Title: GIS Project Manager

Phone: (850) 606-5587

Email: gregm@mail.co.leon.fl.us

TLCGIS regularly uses digital orthophotos and planimetric/hydrographic/topographic data to support regulatory functions, land management and acquisition, planning, engineering and habitat restoration projects.

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LAS classifications:

1 = Unclassified

2 = Ground

7 = Noise

9 = Water

10 = Swamp

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

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/573/supplemental/2009_NWFWMD_Lidar_Leon_County.kmz

LAS classifications:

1 = Unclassified

2 = Ground

7 = Noise

9 = Water

10 = Swamp

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Any conclusions drawn from analysis of this information are not the responsibility of the Northwest Florida Water Management District (NWFWMD), the NOAA Office for Coastal Management or its partners.

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

The data set is dynamically generated based on user-specified parameters.

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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may no longer represent actual surface conditions.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 base critical applications on this data set without full

awareness of potential limitations.

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3500

Verification of attribute accuracy for Lidar data involves the use of filtering techniques. Auto-filtering uses algorithms to reclassify data in the point cloud. Hand-filtering involves the analysis of a technician working in a graphic environment to reclassify the erroneous points that may remain in the Lidar point cloud after auto-filter.

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NSSDA accuracy of 0.5292 feet exceeds Fundamental Vertical Accuracy (FVA) requirement of 0.6 feet; Quantitative Value: 0.082296 meters, Test that produced the value: RMSE(z)

Cloud Cover: 0

The dataset was reviewed to ensure completeness and accuracy.

Calibrations of the Lidar flight line data are performed; this process is known as bore sighting. The flight lines are compared to evaluate both their relative and absolute accuracies.