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Short Citation:
OCM Partners, 2023: 2015 SRWMD Lidar DEM: North Central Florida, https://www.fisheries.noaa.gov/inport/item/62877.

Item Identification

Title: 2015 SRWMD Lidar DEM: North Central Florida
Short Name: fl2015_srwmd_n_cent_fl_m9178_metadata
Status: Completed
Creation Date: 2015
Abstract:

This data set extends to a 100 meter buffer around SRWMD LiDAR Gaps in North Central FL BAA-FY15 boundary, which covers parts of Baker, Columbia, Dixie, Gilchrist, Hamilton, Jefferson, Lafayette, Levy, Madison, Taylor, and Union Counties in Florida, approximately 2030 Square Miles. This data set was created from LiDAR point cloud LAS swath files and tiled Las files. Each LAS file contains LiDAR point information, which has been calibrated, controlled, and classified.

Ground Conditions: water at normal levels; no unusual inundation; no snow; leaf off USGS-NGP Base Lidar Specification v1.2

The NOAA Office for Coastal Management (OCM) received the DEM tif files from the Suwannee River Water Management District (SRWMD) and processed the data to the Data Access Viewer (DAV) and to https. The total number of files processed was 2945.

In addition to these bare earth Digital Elevation Model (DEM) data, the lidar point data that these DEM data were created from, and the hydro breaklines are also available. These data are available for custom download at the link provided in the URL section of this metadata record.

Purpose:

The USGS/NGTOC contracted Digital Aerial Solutions, LLC to obtain professional services related to the planning,acquisition and development of Light Detection and Ranging (Lidar) data and derivative products. The task order is for a QL2 Lidar survey to be collected over Baker, Columbia, Dixie, Gilchrist, Hamilton, Jefferson, Lafayette, Levy, Madison, Taylor, and Union Counties in Florida. The deliverable products would be used by the USGS/NGTOC for conservation planning, design, research, floodplain mapping, wetlands identification, dam safety assessments, hydrologic modeling, and other environmental purposes.

Supplemental Information:

All Lidar data and associated products were acquired, calibrated, and used in the creation of Lidar derived products by Digital Aerial Solutions, LLC.

The following are the USGS lidar fields in JSON:

{

"ldrinfo" : {

"ldrspec" : "USGS-NGP Base Lidar Specification v1.2

",

"ldrsens" : "Leica ALS80-HP

",

"ldrmaxnr" : "Unlimited

",

"ldrnps" : "0.7

",

"ldrdens" : "4.0

",

"ldranps" : "0.71

",

"ldradens" : "2.0

",

"ldrfltht" : "1600

",

"ldrfltsp" : "120

",

"ldrscana" : "40

",

"ldrscanr" : "44.9

",

"ldrpulsr" : "335.2

",

"ldrpulsd" : "4

",

"ldrpulsw" : "0.46

",

"ldrwavel" : "1064

",

"ldrmpia" : "1

",

"ldrbmdiv" : "0.15

",

"ldrswatw" : "1165

",

"ldrswato" : "20

",

"ldrgeoid" : "National Geodetic Survey (NGS) Geoid 12B

"

},

"ldraccur" : {

"ldrchacc" : "0.643

",

"rawnva" : "0.432

",

"rawnvan" : "95

",

"clsnva" : "0.429

",

"clsnvan" : "95

",

"clsvva" : "0.941

",

"clsvvan" : "74

"

},

"lasinfo" : {

"lasver" : "1.4

",

"lasprf" : "6

",

"laswheld" : "Withheld (ignore) points were identified in the files using the standard LAS Withheld bit.

",

"lasolap" : "Swath overage points were identified in these files using the standard LAS overlap bit.

",

"lasintr" : "16

",

"lasclass" : {

"clascode" : "1",

"clasitem" : "Undetermined/Unclassified"

},

"lasclass" : {

"clascode" : "2",

"clasitem" : "Bare earth"

},

"lasclass" : {

"clascode" : "7",

"clasitem" : "Low Noise"

},

"lasclass" : {

"clascode" : "9",

"clasitem" : "Water"

},

"lasclass" : {

"clascode" : "10",

"clasitem" : "Ignored Ground"

},

"lasclass" : {

"clascode" : "17",

"clasitem" : "Bridges"

},

"lasclass" : {

"clascode" : "18",

"clasitem" : "High Noise"

}

}}

Keywords

Theme Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
ISO 19115 Topic Category
elevation
UNCONTROLLED
None DEM
None erosion
None Intensity Image

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > FLORIDA
Global Change Master Directory (GCMD) Location Keywords
VERTICAL LOCATION > LAND SURFACE
UNCONTROLLED
None Continent > North America > United States Of America > Florida > Baker County
None Continent > North America > United States Of America > Florida > Columbia County
None Continent > North America > United States Of America > Florida > Dixie County
None Continent > North America > United States Of America > Florida > Gilchrist County
None Continent > North America > United States Of America > Florida > Hamilton County
None Continent > North America > United States Of America > Florida > Jefferson County
None Continent > North America > United States Of America > Florida > Lafayette County
None Continent > North America > United States Of America > Florida > Levy County
None Continent > North America > United States Of America > Florida > Madison County
None Continent > North America > United States Of America > Florida > Taylor County
None Continent > North America > United States Of America > Florida > Union County

Instrument Keywords

Thesaurus Keyword
UNCONTROLLED
Global Change Master Directory (GCMD) Instrument Keywords Earth Remote Sensing Instruments > Active Remote Sensing > Profilers/Sounders > Lidar/Laser Sounders > LIDAR > Light Detection and Ranging

Platform Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Platform Keywords
AIRCRAFT

Physical Location

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

Data Set Information

Data Set Scope Code: Data Set
Data Set Type: Elevation
Maintenance Frequency: As Needed
Data Presentation Form: Model (digital)
Entity Attribute Detail Citation:

LiDAR Tiles and associated derived products for SRWMD LiDAR Gaps in North Central FL BAA-FY15

Distribution Liability:

The data represented is the result of data collection and processing per contract specifications and indicates the general existing conditions at the time of data collection. As such, it is only valid for its intended use, content, time, and accuracy specifications. The user is responsible for the results of any application of the data for other than its intended purpose.

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

Data Set Credit: SRWMD, USGS, Digital Aerial Solutions, LLC

Support Roles

Data Steward

CC ID: 988577
Date Effective From: 2020
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Distributor

CC ID: 988576
Date Effective From: 2020
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Metadata Contact

CC ID: 988578
Date Effective From: 2020
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Point of Contact

CC ID: 988579
Date Effective From: 2020
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 1154638
W° Bound: -83.83111
E° Bound: -82.295177
N° Bound: 30.661306
S° Bound: 29.136186

Extent Group 1 / Time Frame 1

CC ID: 1154637
Time Frame Type: Range
Start: 2015-12-10
End: 2016-01-14

Spatial Information

Spatial Representation

Representations Used

Grid: Yes
Vector: No
Text / Table: No
TIN: No
Stereo Model: No
Video: No

Access Information

Security Class: Unclassified
Data Access Procedure:

Data is available online for bulk and custom downloads.

Data Access Constraints:

No restrictions apply to this data the data represented is the result of data collection and processing per contract specifications and indicates the general existing conditions at the time of the data collection. As such, it is only valid for its intended use, content, time, and accuracy specifications. The user is responsible for the results of any application of the data for other than its intended purpose.

Data Use Constraints:

None, however, users should be aware that temporal changes may have occurred since this data set was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of the limitations of the data. Acknowledgment of the US Geological Survey would be appreciated for products derived from these data. The data represented is the result of data collection and processing per contract specifications and indicates the general existing conditions at the time of the data collection. As such, it is only valid for its intended use, content, time, and accuracy specifications. The user is responsible for the results of any application of the data for other than its intended purpose.

Distribution Information

Distribution 1

CC ID: 988580
Start Date: 2020-08-19
End Date: Present
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9178/details/9178
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2020 - Present)
File Name: Customized Download
Description:

Create custom data files by choosing data area, product type, map projection, file format, datum, etc. A new metadata will be produced to reflect your request using this record as a base. Change to an orthometric vertical datum is one of the many options.

File Date/Time: 2020-09-08 00:00:00
File Type: Zip
Compression: Zip

Distribution 2

CC ID: 988581
Start Date: 2020-08-19
End Date: Present
Download URL: https://coast.noaa.gov/htdata/raster5/elevation/FL_N_Cent_DEM_2015_9178
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2020 - Present)
File Name: Bulk Download
Description:

Bulk download of data files in FL State Plane North (NAD83 HARN) US Survey Ft coordinates and NAVD88 (Geoid12b) elevations in feet.

File Date/Time: 2020-09-08 00:00:00
File Type: GeoTIFF

URLs

URL 1

CC ID: 988582
URL: https://coast.noaa.gov/dataviewer/
Name: NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV)
URL Type:
Online Resource
File Resource Format: HTML
Description:

The Data Access Viewer (DAV) allows a user to search for and download elevation, imagery, and land cover data for the coastal U.S. and its territories. The data, hosted by the NOAA Office for Coastal Management, can be customized and requested for free download through a checkout interface. An email provides a link to the customized data, while the original data set is available through a link within the viewer.

URL 2

CC ID: 988583
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9172/supplemental/fl2015_srwmd_m9172.kmz
Name: Browse graphic
URL Type:
Browse Graphic
File Resource Format: KML
Description:

This graphic displays the footprint for this lidar data set.

URL 3

CC ID: 988584
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9172/supplemental/BAA_Suwannee_Gaps_LiDAR_Project_Report.pdf
Name: Dataset report
URL Type:
Online Resource
File Resource Format: PDF
Description:

Link to data set report.

URL 4

CC ID: 988585
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9172/breaklines/
Name: Breaklines
URL Type:
Online Resource
Description:

Link to data set breaklines.

URL 5

CC ID: 988605
URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9172/details/9172
Name: Point download
URL Type:
Online Resource
Description:

Link to custom download, from the Data Access Viewer (DAV), the lidar point data from which these raster Digital Elevation Model (DEM) data were created.

Technical Environment

Description:

Inertial Explorer ver: 8.6; Leica CloudPro Ver:1.2.1; GeoCue Ver: 2014.1.21.4; Microstation V8i; Terresolid ver: 2015; LP360 ver: 2014.1.51.1; Arcmap ver: 10.4; Global Mapper ver: 16

Data Quality

Horizontal Positional Accuracy:

Horizontal error in lidar derived elevation data is largely a function of positional error as derived from the Global Navigation Satellite System (GNSS), attitude (angular orientation) error (as derived from the INS) and flying altitude; and can be estimated based on these parameters. As described in Section 7.5 of the ASPRS Positional Accuracy Standards for Digital Geospatial Data the horizontal errors in lidar data are largely a function of GNSS positional error, INS angular error, and flying altitude. Therefore lidar data collected with GNSS error of 0.05m and the IMU error of 0.03492 degrees at an altitude of 10,500 feet MSL; the expected radial horizontal positional error will be RMSEr = 0.367 US Survey Ft (11.2 cm).

Vertical Positional Accuracy:

Vertical Accuracy of the bare-earth lidar data was assessed and reported in accordance with the ASPRS Positional Accuracy Standards for Digital Geospatial Data; One hundred and sixty-nine (169) surveyed points were measured for the purpose of assessing the accuracy of the SRWMD LiDAR Gaps in North Central FL BAA-FY15 (95 NVA + 74 VVA). Both data sets, Lidar and Digital Elevation Models (DEMs) have been tested for their individual vertical accuracy levels. The Lidar was tested by using interpolation while the DEMs where tested by extracting the elevation of a pixel containing the checkpoint. All DEM Vertical accuracy results are reported in the DEM Metadata reports while this project wide Metadata file is reporting the vertical accuracy results from the the source Lidar. Required Vegetated Vertical Accuracy (VVA): 0.965 US Survey Ft. Required Non Vegetated Vertical Accuracy (NVA) : 0.643 US Survey Ft. This data set was tested to meet ASPRS Positional Accuracy Standards for Digital Geospatial Data (2014) for a 0.328 US Survey Ft RMSEz Vertical Accuracy Class. Actual NVA accuracy was found to be RMSEz = 0.219 US Survey Ft (6.8 cm) equating to +/-0.429 US Survey Ft (13.1 cm ) at 95% confidence level.

Calculated Non-Vegetated Vertical Accuracy (NVA) of the Digital Elevation Model: 0.435 US Survey Ft (13.3 cm)

RMSE is 6.8 cm

Number of Check Points used to calculate the Reported (NVA) for the Digital Elevation Model: 95

Calculated (VVA) of the Digital Elevation Model: 0.932 US Survey Ft (28.4 cm)

Number of Check Points used to calculate the Reported (VVA) for the Digital Elevation Model: 74

Completeness Report:

The raw LAS data files included all data points collected. No points have been removed or excluded. A visual qualitative assessment was performed to ensure data completeness. No void areas or missing data exist. The raw point cloud is of good quality and data passes Fundamental Vertical Accuracy specifications.Void areas (i.e., areas outside the project boundary but within the tiling scheme) are coded using a unique NODATA value. This value is identified in the appropriate location within the file header.

Conceptual Consistency:

Aerial LiDAR data covers the entire area of Interest intended for this project task. All LiDAR Point Cloud tiles show no edge artifacts or mismatches from tile to tile. Void areas (i.e., areas outside the project boundary but within the tiling scheme) are coded using a unique NODATA value. This value is identified in the appropriate location within the file header. Data cover the entire area specified for this project.

Data Management

Have Resources for Management of these Data Been Identified?: Yes
Approximate Percentage of Budget for these Data Devoted to Data Management: Unknown
Do these Data Comply with the Data Access Directive?: Yes
Actual or Planned Long-Term Data Archive Location: NCEI-CO
How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive?:

Data is backed up to tape and to cloud storage.

Lineage

Sources

SRWMD LiDAR Gaps in North Central FL BAA-FY15

CC ID: 1154626
Contact Role Type: Originator
Contact Type: Organization
Contact Name: Digital Aerial Solutions, LLC
Extent Type: Range
Extent Start Date/Time: 2016-01-18
Extent End Date/Time: 2016-06-29
Scale Denominator: 1200
Source Contribution:

This data source was used (along with the airborne GPS/IMU Data) to georeferencing of the lidar point cloud data used to create all contracted Lidar derived products. Version of the LAS Standard 1.4 / point data record format 6.

Process Steps

Process Step 1

CC ID: 1154627
Description:

Aerial LiDAR Acquisition: Aerial data collection was acquired, in Twelve (12) missions, using the Leica ALS80 SN# 8235 at an altitude of 6,100 feet MSL. This was to support a 4.0 ppm^2 LiDAR point cloud. Airborne GPS and IMU data was collected during the acquisition and supported by Leica GS15 & GPS 1200 base stations that occupied temporary monuments in conjunction with CORS stations, Data acquisition started December 10, 2015 and was complete January 14, 2016.

Ground Control Survey: A survey was performed to support the acquisition of Light Detection and Ranging (LiDAR). The control network involved a total of 169 check points (95 NVA + 74 VVA). The points were a combination of the following ground cover classification: Bare Earth, Pavement, Sand, High Vegetation, Medium Vegetation, Low Vegetation. All field survey observations were conducted between August 10, 2015 and August 14, 2015 with Leica GPS 1200 equipment.

Process Date/Time: 2016-01-18 00:00:00

Process Step 2

CC ID: 1154628
Description:

LiDAR Pre-processing: Airborne GPS and IMU data were merged to develop a Smooth Best Estimate of Trajectory (SBET) of the LiDAR system for each mission. LiDAR ranging data were initially calibrated using previous best parameters for this instrument and aircraft. Relative calibration was evaluated using advanced plane-matching analysis and parameter corrections derived. This process was repeated interactively until residual errors between overlapping swaths, across all project lifts, was reduced to 2 cm or less. Raw data NVA were checked using surveyed check points.

Process Date/Time: 2016-02-22 00:00:00

Process Step 3

CC ID: 1154629
Description:

RAW Data Processing: The Initial processing of the GPS data was processed using Inertial Explorer producing a solution file for each mission. Leica CloudPro software was then used to generate georeferenced laser returns into LAS 1.2 file format for each flight-line per each mission, this went through an initial Quality Control of the overlap between the flight-line swaths.

Process Date/Time: 2016-02-29 00:00:00

Process Step 4

CC ID: 1154630
Description:

LiDAR Post-processing: The calibrated and controlled LiDAR swaths were processed using automatic point classification routines in TerraSolid software. These routines operate against the entire collection (all swaths, all lifts), eliminating character differences between files. Data were then distributed as virtual tiles to experienced LiDAR analysts for localized automatic classification, manual editing, and peer-based QC checks. Supervisory QC monitoring of work in progress and completed editing ensured consistency of classification character and adherence to project requirements across the entire project. All classification tags are stored in the original swath files. After completion of classification and final QC approval, the NVA and VVA for the project are calculated. Sample areas for each land cover type present in the project were extracted and forwarded to the client, along with the results of the accuracy tests. Upon acceptance, the complete classified LiDAR swath files were delivered to the client.

Process Date/Time: 2016-02-21 00:00:00

Process Step 5

CC ID: 1154631
Description:

LiDAR Classification: The calibrated LiDAR data went through automated classification routines and then manually edited and checked. The LiDAR point cloud data was classified into the following classes: 1-unclassified*, 2-ground, 7-low noise, 9-water, 10-buffer, 17-bridges, and 18-high noise

Process Date/Time: 2016-01-08 00:00:00

Process Step 6

CC ID: 1154632
Description:

Hydro Breaklines: Hydro break lines were compiled in ArcMap using the LiDAR intensity data and surface terrain model of the entire project area. After the collection of hydro lines all features were conflated and validated for monotonicity and vertical variance, to ensure that no points were floating above ground. The hydro break lines were then embeded into the LiDAR surface and used to create a hydro enforced DEM.

Process Date/Time: 2016-06-20 00:00:00

Process Step 7

CC ID: 1154633
Description:

Bare-Earth DEM Creation: Bare-Earth Digital Elevation Models (DEMs) were derived using the hydro break line and bare-earth (ground) LiDAR points, all DEMs were created with a grid spacing of 5 foot. The DEMs were cut to tiles of 5000 feet x 5000 feet index, provided by the US Geological Survey.

Process Date/Time: 2016-06-29 00:00:00

Process Step 8

CC ID: 1154634
Description:

The NOAA Office for Coastal Management (OCM) received DEM tif files at a 2.5 ft grid spacing from the SRWMD.

The total number of files downloaded and processed was 2945.

The data were in FL State Plane North (0903), (NAD83 HARN), US Survey Feet coordinates and NAVD88 (Geoid12B) elevations in feet.

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

1. Used internal script to assign the EPSG codes (Horiz - 2883, Vert - 5703) and convert to GeoTiff format.

2. Copied the files to https.

Process Date/Time: 2020-09-08 00:00:00
Process Contact: Office for Coastal Management (OCM)

Process Step 9

CC ID: 1154635
Description:

The NOAA Office for Coastal Management (OCM) received a single DEM tif file at a 2.5 ft grid spacing from the SRWMD. This file provided coverage in an area where there was a gap. This data was received and processed to the DAV in Sept 2020.

The data were in FL State Plane North (0903), (NAD83 HARN), US Survey Feet coordinates and NAVD88 (Geoid12B) elevations in feet.

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

1. Used internal script to assign the EPSG codes (Horiz - 2883, Vert - 5703) and convert to GeoTiff format.

2. Copied the files to https.

Process Date/Time: 2020-09-23 00:00:00
Process Contact: Office for Coastal Management (OCM)

Related Items

Item Type Relationship Type Title
Data Set (DS) Cross Reference 2015 SRWMD Lidar: North Central Florida

Catalog Details

Catalog Item ID: 62877
GUID: gov.noaa.nmfs.inport:62877
Metadata Record Created By: Rebecca Mataosky
Metadata Record Created: 2020-09-08 18:45+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