2007 Northwest Water Manangement District Lidar: Jackson County ("Jackson Blue"),
This kmz file shows the extent of coverage for the 2007 NWFWMD Jackson County ("Jackson
Blue"), FL lidar data set.
LIDAR-derived binary (.las) files containing points classified as bare-earth and canopy
(first return) were produced for the 2007 Northwest Florida Water Management District
- Jackson County, Florida lidar mapping project. The files were provided in a scheme
of FDEM-derived 5,000 x 5,000 foot (1500 x 1500 meter) tiles. Horizontal mapping units
are in UTM meters, vertical mapping units are in U.S. survey feet. The total mapping
area covers 183 square miles of Jackson County, Florida.
Cite this dataset when used as a source.
|Search and Download
|| Distributor information not available
| Point of Contact
||Mr. Ron Bartel
Northwest Florida Water Management District
- Northwest Florida Water Management District (NWFWMD)
|Data Presentation Form:
|| Digital image
|Dataset Progress Status
|Data Update Frequency:
|| As needed
||Lidar points are attributed with the following classifications: 1 - unclassified 2
- ground (bare earth) Lidar intensity values range from 0-255. Lidar return values
range from 1-3. Flight line numbers range from 1-19. All deliverables meet specifications
in contract. LAS Files meet ASPRS Classification Standards.
||The purpose of the project is to produce accurate, high-resolution data for planning,
analysis, and for use with other data sets. Merrick & Company obtained LiDAR data
over approximately 183 square miles covering the majority of Jackson County, Florida.
The LiDAR data has been processed to result in a data set that is suitable for the
future generation of 2-foot contours. These data will be used to support FEMA's Map
Modernization Program through the creation of high-resolution digital elevation models
(DEMs). These DEMs support a variety of applications, including improved floodplain
delineation, hydrologic and hydraulic modeling, hazard mapping as well as other planning
|| Unknown to Unknown
|Spatial Reference System:
|Spatial Bounding Box Coordinates:
|Spatial Coverage Map:
- digital surface model
- bare earth
- Northwest Florida Water Management District
- Jackson 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 ALS50 Phase 2 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 projected UTM (NAD83, Zone 16) coordinates to geographic (NAD83)
coordinates 2. The data were converted from NAVD88 heights to ellipsoid heights using
Geoid03 3. The data were reclassified; class 5 (canopy) was reclassified to class
1 (unclassified) as class 5 did not accurately depict canopy but contained all non-bare
earth points. 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: 2013-06-07
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