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Short Citation:
OCM Partners, 2023: 2008 Florida Division of Emergency Management Lidar: Middle Suwannee River,

Item Identification

Title: 2008 Florida Division of Emergency Management Lidar: Middle Suwannee River
Short Name: fl2008_fdem_middlesuwannee_m4891_metadata
Status: Completed
Publication Date: 2015-05

LiDAR Survey for the Suwannee River Water Management District (SRWMD), Florida. The LiDAR aerial acquisition was conducted in January of 2008, and the breaklines and contours were subsequently generated by the Program and Data Solutions (PDS) team. The PDS team is under contract 07-HS-34-14-00-22-469 with the Florida Division of Emergency Management (FDEM) and offered LiDAR and derived products to add-on clients, including the SRWMD, at the same volume-discount unit rates per tile as negotiated for the FDEM contract and utilizing the same Baseline Specifications from FDEM.

The LiDAR dataset for the SRWMD was acquired by Terrapoint USA in January of 2008 and processed to a bare-earth digital terrain model (DTM); it was produced to FDEM Baseline Specifications. Detailed breaklines and contours were produced by the PDS team for the 65-tile area to be mapped. Each tile covers an area of 5000 ft by 5000 ft. The map at Appendix A displays the 65 tiles of the SRWMD for which LiDAR DTMs and LiDAR-derived breaklines and contours were produced by the PDS team.

The FDEM Baseline Specifications require a maximum LiDAR post spacing of 4 feet, i.e., an average point density of less than 1 point per square meter. However, the PDS team required a much higher point density of its subcontractors in order to increase the probability of penetrating dense foliage; with nominal post spacing of 0.7 meters per flight line and 50% sidelap between flight lines, the average point density is 4 points per square meter. With higher point density there is a greater probability of penetrating dense vegetation and minimizing areas defined as "low confidence areas."


The purpose of this LiDAR data was to produce high accuracy 3D terrain geospatial products for Suwannee River Area.



Supplemental Information:

A report for this project is available at:

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


Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
None Contour

Physical Location

Organization: Office for Coastal Management
City: Charleston
State/Province: SC

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: As Needed
Data Presentation Form: las
Entity Attribute Overview:

LAS 1.2 format (classes 1,2,7,9,12)

Entity Attribute Detail Citation:


Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility of FDEM, Terrapoint, NOAA, the Office for Coastal Management or its partners.

Support Roles

Data Steward

CC ID: 672790
Date Effective From: 2015-05
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202


CC ID: 672792
Date Effective From: 2015-05
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202

Metadata Contact

CC ID: 672793
Date Effective From: 2015-05
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202

Point of Contact

CC ID: 672791
Date Effective From: 2015-05
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202


Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 1136854
W° Bound: -82.950106
E° Bound: -82.648021
N° Bound: 29.953209
S° Bound: 29.811839

Extent Group 1 / Time Frame 1

CC ID: 1136853
Time Frame Type: Discrete
Start: 2008-01

Spatial Information

Spatial Representation

Representations Used

Vector: Yes

Access Information

Security Class: Unclassified
Data Access Procedure:

This data can be obtained on-line at the following URL:

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

Data Access Constraints:


Data Use Constraints:

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. These data depict the heights at the time of the survey and are only accurate for that time.

Distribution Information

Distribution 1

CC ID: 740783
Download URL:
File Name: Customized Download

Create custom data files by choosing data area, product type, map projection, file format, datum, etc.

Distribution 2

CC ID: 740784
Download URL:
File Name: Bulk Download

Simple download of data files.



CC ID: 740786
URL Type:
Online Resource


CC ID: 740787
URL Type:
Online Resource


CC ID: 740788
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz

This graphic shows the lidar coverage for the 2008 lidar project covering the Middle Suwannee River region, Florida.

Activity Log

Activity Log 1

CC ID: 672813
Activity Date/Time: 2016-05-23

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 672812
Activity Date/Time: 2017-11-14

Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using '' script. Contact Tyler Christensen (NOS) for details.

Activity Log 3

CC ID: 718242
Activity Date/Time: 2018-02-08

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 740785
Activity Date/Time: 2018-03-13

Partial upload to move data access links to Distribution Info.

Data Quality

Horizontal Positional Accuracy:

Lidar source compiled to meet 1m horizontal accuracy.; Quantitative Value: 1.0 meters, Test that produced the value: The PDS team does not perform independent horizontal accuracy testing on the LiDAR. LiDAR vendors perform calibrations on the LiDAR sensor and compare data to adjoing flight lines to ensure LiDAR meets the 1 meter horizontal accuracy standard at the 95% confidence level.

Vertical Positional Accuracy:

The 3D breaklines inherit the accuracy of the Lidar stereopairs it was acquired from.; Quantitative Value: 0.076 meters, Test that produced the value: Based on the vertical accuracy testing conducted by PDS, using NSSDA and FEMA guidelines, vertical accuracy at the 95% confidence level (called Accuracyz) is computed by the formula RMSEz x 1.9600. The dataset for Suwannee River, Florida satisfies the criteria:

Countywide lidar dataset tested 14.9 cm vertical accuracy at 95% confidence level in open terrain, based on open terrain RMSEz (7.62 cm) x 1.9600.

Countywide lidar dataset tested 18.6 cm vertical accuracy at 95% confidence level in all land cover categories combined, based on consolidated RMSEz (9.45 cm) x 1.9600.

Completeness Report:

A visual qualitative assessment was performed in the source Lidar dataset. Data met project specifications. Additional information on this process located in the Minimum Technical Standard (MTS report) "Final Report OF Specific Purpose LiDAR Survey - LiDAR-Generated Breaklines and Contours" submited to Florida Division of Emergency Management.

Conceptual Consistency:

Data covers the tile scheme provided for the county.


Process Steps

Process Step 1

CC ID: 1136849

The ABGPS, IMU, and raw Optech 3100ea LiDAR scans are integrated using Optech Incorporated's DASHMap, version 1.1 software, Terrascan software and Microstation software. The resultant file is in a LAS binary file format . The LAS file version 1.1 format can be easily transferred from one file format to another. It is a binary file format that maintains information specific to the LiDAR data (return#, intensity value, xyz, etc.). The resultant points are referenced to the NAD83 horizontal datum and GRS80 vertical datum. The date and time for each flight line can be determined using the Julian date and time. The Julian date is a continuous count of days and fractions since noon Universal Time on January 1, 4713 BCE on the Julian Calendar.

Process Date/Time: 2008-01-01 00:00:00

Process Step 2

CC ID: 1136850

The unedited data are classified to facilitate the application of the appropriate feature extraction filters. A combination of proprietary filters are applied as appropriate for the production of bare earth digital terrain models (dtms). Interactive editing methods are applied to those areas where it is inappropriate or impossible to use the feature extraction filters, based upon the design criteria and/or limitations of the relevant filters. These same feature

extraction filters are used to produce elevation height surfaces. The LiDAR mass points were delivered in American Society for Photogrammetry and Remote Sensing LAS 1.1 format. The header file for each dataset is complete as define by the LAS 1.1 specification. In addition the following fields are included (Precision reported in brackets): Class (Integer); GPS Week Time (0.0001 seconds); Easting (0.01 meter); Northing (0.01 meter);

Elevation (0.01 meter); Echo Number (Integer 1 to 4); Echo (Integer 1 to 4); Intensity (8 Bit Integer);

Flightline (Integer); Scan Angle (Integer Degree). The LAS files do not include overlap.

The data was classified as follows:

Class 1 = Unclassified. This class includes vegetation, buildings, noise etc.

Class 2 = Ground

Class 7= Noise

Class 9 = Water

Process Date/Time: 2008-01-01 00:00:00

Process Step 3

CC ID: 1136851

The NOAA Office for Coastal Management (OCM) received the files in las format from SRWMD. The files contained lidar elevation and intensity measurements. The data were in State Plane 903, NAVD88 (orthometric) heights in feet. OCM performed the following processing for data storage and Digital Coast provisioning purposes:

1. The data were converted from State Plane coordinates to geographic coordinates.

2. The data were converted from NAVD88 (orthometric) heights in feet to GRS80 (ellipsoid) heights in meters using Geoid 03.

3. The LAS data were sorted by latitude and the headers were updated.

4. Duplicate points and erroneous elevations were removed.

Process Date/Time: 2015-04-23 00:00:00

Catalog Details

Catalog Item ID: 49693
GUID: gov.noaa.nmfs.inport:49693
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:21+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2022-08-09 17:11+0000
Metadata Record Published: 2022-03-16
Owner Org: OCMP
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2022-03-16
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2023-03-16