2010 Northwest Florida Water Management District (NWFWMD) Lidar: Mission 2010 (Portions
of Liberty and Calhoun Counties)
This kmz file shows the extent of coverage for the 2010 NWFWMD "Mission 2010" lidar
LIDAR-derived binary (.las) files containing points classified as: Unclassified (1),
Ground (2) and Water (9) were produced for the 2010 Northwest Florida Water Management
District - 2 Counties (Calhoun and Liberty), Florida LIDAR mapping project. The data
were collected March 30 - April 1, 2010 and the total mapping area covers approximately
585 square miles in Liberty County and 2.65 square miles in Calhoun County.
Cite this dataset when used as a source.
|Search and Download
|| Distributor information not available
| Point of Contact
||Mr. John Crowe
Northwest Florida Water Management District (NWFWMD)
Lidar Survey Collection Report
- Northwest Florida Water Management District (NWFWMD)
|Data Presentation Form:
|| Digital image
|Dataset Progress Status
|Data Update Frequency:
|| As needed
||ASPRS LAS 1.2 specifications / classification designations for filtering: Class 1
= Unclassified, Class 2 = Ground, Class 9 = Water; LIDAR intensity values range from
0-255; LIDAR return values range from
1-3; Flight line numbers range from 1-19.
||To produce accurate, high-resolution data for planning, analysis, and for use with
other data sets.
||2010-03-30 to 2010-04-01
|Spatial Reference System:
|Spatial Bounding Box Coordinates:
|Spatial Coverage Map:
- digital surface model
- bare earth
- Northwest Florida Water Management District
- Calhoun County
- Liberty County
| Use Constraints
|| No constraint information available
|| Fee information not available.
- Description of Source: Source Contribution: Ground Control. GPS control network for LIDAR acquisition and
processing.Source Type: spreadsheet
- Temporal extent used:
|| Lineage statement not available.
- Merrick & Company
- DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department
| Processing Steps
- LIDAR data was collected using Merrick's ALS60 sensor. The raw data was verified in
MARS software for complete coverage of the project area, and boresighted to align
the flightlines. Raw data files were parsed into manageable client-specific tiles.
These tiles were then processed through automated filtering that separates the data
into different classification groups: error points, ground points, and canopy/building
points. The data was next taken into a graphic environment to reclassify the erroneous
points that may remain in the LIDAR point cloud after auto filter.
- The NOAA Coastal Services Center (CSC) received files in LAS format. The files contained
LiDAR intensity and elevation measurements. CSC performed the following processing
on the data for data storage purposes and Digital Coast provisioning: 1. The data
were converted from UTM, Zone 16 coordinates to geographic (NAD83) coordinates; 2.
The data were filtered to remove elevation outliers; 3. The data were converted from
NAVD88 heights to ellipsoid heights using Geoid03; 4. 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: 2013-05-09
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