Slide Menu
Search Help Show/Hide Menu
Short Citation:
OCM Partners, 2023: 2011 USGS Topographic LiDAR: Suwannee River Expansion,

Item Identification

Title: 2011 USGS Topographic LiDAR: Suwannee River Expansion
Short Name: fl2011_usgs_suwanneeriver_m2493_metadata
Status: Completed
Publication Date: 2013-06

USGS Task Order No. G10PD00236

USGS Contract No. G10PC00093

The Light Detection and Ranging (LiDAR) dataset is a survey of the Suwannee River Expansion in north-central Florida. The entire survey area encompasses 950 square miles.

The LiDAR point cloud was flown at a nominal post spacing of 1.0 meters for unobscured areas. The LiDAR data and derivative products produced are in compliance with the U.S. Geological Survey National Geospatial Program

Guidelines and Base Specifications, Version 13-ILMF 2010. The flight lines were acquired by Digital Aerial Solutions.

This data set is divided into 4 Areas: A, B, C, and D.

Area A: Portions of Dixie, Levy, and Gilchrist Counties

Area B: Portions of Lafayette, Suwannee, and Madison Counties

Area C: Suwannee County

Area D: Bradford and Union Counties

A map of each Area can be found in the Task Order Detail listed below.

This data set is classified according to ASPRS LAS V1.2 standards. The classifications for this data set are as follows:

Class 1: Unclassified

Class 2: Ground

Class 7: Noise

Class 9: Water

Class 10: Ignored Ground (Breakline Proximity)

Class 12: Overlap (Witheld)


This regional LiDAR elevation mapping was obtained under the American Recovery and Reinvestment Act (ARRA) of 2009.



Supplemental Information:

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

A Task Order Detail for this data set may be viewed here:


Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category

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:

LiDAR points in LAS 1.2 format (ASPRS Classes 1,2,7,9,10,13)

Entity Attribute Detail Citation:


Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility

of Digital Aerial Solutions, Northrop Grumman, USGS, NOAA, the Office for Coastal Management or its partners.

Support Roles

Data Steward

CC ID: 673073
Date Effective From: 2013-06
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: 673075
Date Effective From: 2013-06
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: 673076
Date Effective From: 2013-06
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: 673074
Date Effective From: 2013-06
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: 1133987
W° Bound: -83.277958
E° Bound: -82.113038
N° Bound: 30.558547
S° Bound: 29.502137

Extent Group 1 / Time Frame 1

CC ID: 1133986
Time Frame Type: Range
Start: 2011-03-17
End: 2011-04-06

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:


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: 740829
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: 740830
Download URL:
File Name: Bulk Download

Simple download of data files.



CC ID: 740832
URL Type:
Online Resource


CC ID: 740833
URL Type:
Online Resource


CC ID: 740834
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz

This graphic shows the lidar coverage for portions of Hamilton, Lafayette, Madison, Suwannee, Columbia, Union, Bradford, Gilchrist, Dixie, and Levy Counties in Florida.

Activity Log

Activity Log 1

CC ID: 673101
Activity Date/Time: 2016-05-23

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 673100
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: 718250
Activity Date/Time: 2018-02-08

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 740831
Activity Date/Time: 2018-03-13

Partial upload to move data access links to Distribution Info.

Data Quality

Horizontal Positional Accuracy:

There is not a systematic method of testing when testing horizontal accuracy in LiDAR. However this is tested during calibration of the sensor and is rechecked during the comparing of parallel and perpendicular flight lines.

Vertical Positional Accuracy:

Lidar collected under this task order met the vertical accuracy requirement of NSSDA RMSEZ = 0.30 feet or 9.25 cm (NSSDA AccuracyZ 95% = 0.6 feet or 18.2 cm); utilizing assessment procedures to

comply with "FEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix A: Guidance for Aerial Mapping and Surveying". Accuracy for the lidar point cloud data is reported

independently from accuracies of derivative products (i.e., DEMs). Point cloud data accuracy was tested against a Triangulated Irregular Network (TIN) constructed from bare-earth lidar points.

Each landcover type representing 10% or more of the total project area was tested and reported as a Supplemental Vertical Accuracy (SVA) in the project report.

Each Project Area's Vertical Accuracy was reported seperately. The values for each are listed below:

Area A: 0.1m (10cm) RMSEz Consolidated Vertical Accuracy

Area B: 0.14m (14cm) RMSEz Fundamental Vertical Accuracy

Area C: 0.12m (12cm) RMSEz Fundamental Vertical Accuracy

Area D: 0.16m (16cm) RMSEz Fundamental Vertical Accuracy

; Quantitative Value: 0.16 meters, Test that produced the value: RMSEz FVA in meters, see above Report for detailed explanation

Completeness Report:

The LiDAR data was acquired at a density sufficient to support a 1.0 meter post spacing. The bare-earth surface will contain voids in areas that were densely vegetated, covered by bridges, buildings, water, fresh asphalt, sand etc.

Conceptual Consistency:

Digital Aerial Solutions, used a Leica ALS60 serial number 137 sensor system to acquire LiDAR data at a density sufficient to support an 1.0 meter post spacing for unobscured areas. During acquisition the plane was never more

than 40 kilometers from a base station. Digital Aerial Solutions acquired data at an altitude of 6500 feet (AGL). The distance between flight lines is 848 meters and each flight line has 30 percent overlap. The Suwannee River

Expansion Survey was collected under the guidance of a Professional Mapper/Surveyor.


Process Steps

Process Step 1

CC ID: 1133980

The ABGPS, inertial measurement unit (IMU), and raw scans are collected during the LiDAR aerial survey. The ABGPS monitors the xyz position of the sensor and the IMU monitors the orientation. During the

aerial survey, laser pulses reflected from features on the ground surface are detected by the receiver optics and collected by the data logger. GPS locations are based on data collected by receivers on the

aircraft and base stations on the ground. The ground base stations are placed no more than 40 km radius from the flight survey area.

Process Date/Time: 2011-03-17 00:00:00

Process Step 2

CC ID: 1133981

The ABGPS, IMU, and raw scans are integrated using proprietary software developed by Leica and delivered with the Leica System. The resultant file is in a LAS binary file format. The LAS version 1.2 file 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 number, intensity value, xyz, etc.). The resultant points are

produced in the NAD83/2007 HARN State Plane Florida North Coordinate System, with units in U.S. Feet and referenced to the NAVD88 datum. The LiDAR mass points were processed in American Society for Photogrammetry

and Remote Sensing LAS 1.2 format. The header file for each dataset is complete as defined by the LAS 1.2 specification. The datasets were divided into a 5000 ft by 5000 ft tiling scheme, based on the Florida state

grid network. The tiles are contiguous, do not overlap, and are suitable for seamless topographic data mosaics that include no "no data" areas. The names of the tiles include numeric column and row designations and

all files utilize the LAS file extension

Process Date/Time: 2011-05-04 00:00:00

Process Step 3

CC ID: 1133982

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 elevation models (DEMs). 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.

Process Date/Time: 2011-05-04 00:00:00

Process Step 4

CC ID: 1133983

Filtered and edited data are subjected to rigorous QA/QC, according to the 3001 Operating Unit Quality Control Plan and procedures. A series of quantitative and visual procedures are employed to validate the accuracy

and consistency of the filtered and edited data. Ground control is established by Northrop Grumman, 3001 Operating Unit and GPS-derived ground control points (GCPs) in various areas of dominant and prescribed land cover.

These points are coded according to land cover, surface material, and ground control suitability. A suitable number of points are selected for calculation of a statistically significant accuracy assessment, as per the

requirements of the National Standard for Spatial Data Accuracy. A spatial proximity analysis is used to select edited LiDAR data points within a specified distance of the relevant GCPs. A search radius decision rule is

applied with consideration of terrain complexity, cumulative error, and adequate sample size. Accuracy validation and evaluation is accomplished using proprietary software to apply relevant statistical routines for

calculation of Root Mean Square Error (RMSE) and the National Standard for Spatial Data Accuracy (NSSDA), according to Federal Geographic Data Committee (FGDC) specifications.

Process Date/Time: 2011-05-01 00:00:00

Process Step 5

CC ID: 1133984

The NOAA Office for Coastal Management (OCM) received topographic files in LAS 1.2 format. The files contained lidar

elevation measurements. The data were received in Florida State Plane North Zone 0903, NAD83 coordinates

and were vertically referenced to NAVD88 using the Geoid09 model. The vertical units of the data were

feet. OCM performed the following processing for data storage and Digital Coast provisioning purposes:

1. The topographic las files were converted from orthometric (NAVD88) heights to ellipsoidal heights using Geoid09.

2. The topographic las files were converted from a Projected Coordinate System (FL SP North) to a Geographic Coordinate system (NAD83).

3. The topographic las files' vertical units were converted from feet to meters.

4. The topographic las files' horizontal units were converted from feet to decimal degrees.

5. Class 11 (Witheld) was changed to Class 13.

Process Date/Time: 2013-06-01 00:00:00

Catalog Details

Catalog Item ID: 49701
GUID: gov.noaa.nmfs.inport:49701
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