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Short Citation:
OCM Partners, 2023: 2016 Martin County QL2 Lidar DEM (FL), https://www.fisheries.noaa.gov/inport/item/49422.

Item Identification

Title: 2016 Martin County QL2 Lidar DEM (FL)
Short Name: fl2016_martin_county_dem_m6254_metadata
Status: Completed
Publication Date: 2017-03-15
Abstract:

Martin County FL QL2 Lidar

Acquisition and Processing Production Task

Task Order No. G14PS00574

Woolpert Order No. 76001

Contractor: Woolpert, Inc.

This task is for a high resolution data set of lidar covering the total task order area of Martin County(566 square miles). The lidar data was acquired and processed under the requirements identified in this task order. The data delivered in this task order is compliant with US. Geological Survey National Geospatial Program Lidar Base Specification Version 1.2. Lidar data is a remotely sensed high resolution elevation data collected by an airborne platform. The lidar sensor uses a combination of laser range finding, GPS positioning, and inertial measurement technologies. The lidar systems collect data point clouds that are used to produce highly detailed Digital Elevation Models (DEMs) of the earth's terrain, man-made structures, and vegetation. The task required the LiDAR data to be collected at a nominal pulse spacing (NPS) of 0.7 meters. The final products include classified LAS, 4 feet pixel raster DEMs of the bare-earth surface in ERDAS IMG Format, and Intensity data delivered in 5,000ft x 5,000ft tiles. Each LAS file contains lidar point information, which has been calibrated, controlled, and classified. Additional deliverables include hydrologic breakline data, bridge abutment breakline data, control data, and tile index provided as ESRI shapefile, lidar processing and survey reports in PDF format, FGDC metadata files for each data deliverable in .xml format, and LAS swath data. Please note that tile 29261 is a coastal tile and contains no lidar points. The data boundary intersects this tile and a hydro breakline was digitized based on this boundary. For this reason a hydro-flattened DEM IMG was generated. There will be no LAS 1.4 or Intensity Tiff for tile 29261. The DEM IMG file count is 768. The LAS 1.4/Intensity Tiff file count is 767. Lidar data acquired during mean low/low tide. Polygon-Z hydro breaklines contain islands as donut-holes. Ground conditions: Water at normal levels; no unusual inundation; leaf off. In addition to the bare earth Digital Elevation Models (DEMs), the lidar point data are also available. These data are available for download here: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6233 Breaklines created from the lidar are also available by request via email at: coastal.info@noaa.gov. The DEM and breakline products have not been reviewed by the NOAA Office for Coastal Management (OCM) and any conclusions drawn from the analysis of this information are not the responsibility of NOAA, OCM or its partners.

Original contact information:

Contact Org: Woolpert

Phone: (937) 461-5660

Purpose:

The purpose of this County Wide 3D Elevation Program is to support primary and secondary engineering, surveying, flood plain/risk management, emergency services/response, GIS, conservation land restorations, environmental protection, natural and man-made infrastructure improvement initiatives. Data will be utilized for mapping, planning and design on various current and future local, federal, regional, state and water management regional impact initiatives such as FEMA/Flood Plain Mapping, Water Quality, C44 Everglades & Cypress Creek restoration projects, Indian River Lagoon/St. Lucie Estuary environmental protection, beach re-nourishment, flood resilience and mitigation, urban/rural infrastructure planning and improvements projects.

Notes:

12086

Supplemental Information:

The Martin County QL2 Lidar Project Report may be accessed here:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/6233/supplemental/fl2016_martin_county_m6233_lidar_report.pdf

The Martin County QL2 Lidar Project Survey Control Report may be accessed here: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/6233/supplemental/fl2016_martin_county_m6233_survey_report.pdf

The lidar point data that thes DEMs were created from may be accessed here: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6233

Breaklines created from the lidar point data, in either gdb or gpkg format, may be accessed here: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/6233/breaklines.

The DEM and breakline products have not been reviewed by the NOAA Office for Coastal Management (OCM) and any conclusions drawn from the analysis of this information are not the responsibility of NOAA, OCM or its partners.

Keywords

Theme Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > TOPOGRAPHICAL RELIEF MAPS
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION
ISO 19115 Topic Category
elevation
UNCONTROLLED
None DEM
None IMG

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > FLORIDA

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
Distribution Liability:

Woolpert prepared the original data as set forth in the Scope of Services, in accordance with reasonable care and due diligence as set forth in this Agreement, however, due to the easily alterable nature of electronic media, files, documents, and other deliverables, Woolpert, Inc. makes no warranties, either expressed or implied, with respect to the accuracy, completeness, merchantability, or fitness for any particular purpose, including, but not limited to, use of any/all data as described within this metadata file, by any user of this data. Any use will be at the end-user's sole risk. Any conclusions drawn from the analysis of this information are not the responsibility of Woolpert, Inc., Martin County, Florida, NOAA, the NOAA Office for Coastal Management (OCM) or its partners.

Support Roles

Data Steward

CC ID: 661893
Date Effective From: 2017-03-15
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: 661895
Date Effective From: 2017-03-15
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: 661896
Date Effective From: 2017-03-15
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: 661894
Date Effective From: 2017-03-15
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: 1150337
W° Bound: -80.752363
E° Bound: -80.052245
N° Bound: 27.299831
S° Bound: 26.886398

Extent Group 1 / Time Frame 1

CC ID: 1150334
Time Frame Type: Discrete
Start: 2016-01-16

Extent Group 1 / Time Frame 2

CC ID: 1150335
Time Frame Type: Discrete
Start: 2016-01-18

Extent Group 1 / Time Frame 3

CC ID: 1150336
Time Frame Type: Discrete
Start: 2016-01-23

Spatial Information

Spatial Representation

Representations Used

Grid: Yes

Reference Systems

Reference System 1

CC ID: 1265081

Coordinate Reference System

CRS Type: Vertical
EPSG Code: EPSG:6360
EPSG Name: NAVD88 height (ftUS)
See Full Coordinate Reference System Information

Reference System 2

CC ID: 1265082

Coordinate Reference System

CRS Type: Projected
EPSG Code: EPSG:6438
EPSG Name: NAD83(2011) / Florida East (ftUS)
See Full Coordinate Reference System Information

Access Information

Security Class: Unclassified
Data Access Procedure:

This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6254;

Data Access Constraints:

No restrictions apply to this data.

Data Use Constraints:

None. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions. End users should be aware some areas of this project are located in areas exhibiting swamp-like and/or heavily vegetated conditions. In such areas, placement of hydrographic features developed as part of the hydrologic breakline dataset may appear ambiguous. Users should not use these data for critical applications without a full awareness of its limitations.

Distribution Information

Distribution 1

CC ID: 720803
Start Date: 2023-08-15
End Date: Present
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6254
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2017-03-15 - Present)
File Name: Customized Download
Description:

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

File Type (Deprecated): Zip
Compression: Zip

Distribution 2

CC ID: 720804
Start Date: 2023-08-15
End Date: Present
Download URL: https://coast.noaa.gov/htdata/raster2/elevation/FL_Martin_County_DEM_2016_6254
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2017-03-15 - Present)
File Name: Bulk Download
Description:

Simple download of data files.

File Type (Deprecated): GeoTIFF
Distribution Format: GeoTIFF

URLs

URL 1

CC ID: 720806
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 720807
URL: https://coast.noaa.gov/dataregistry
URL Type:
Online Resource

URL 3

CC ID: 720808
URL: https://coast.noaa.gov
URL Type:
Online Resource

URL 4

CC ID: 720809
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/6233/supplemental/fl2016_martin_county_m6233.kmz
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz
Description:

This graphic shows the lidar footprint for the 2016 Martin County Florida lidar project along the east coast of Florida.

Activity Log

Activity Log 1

CC ID: 661916
Activity Date/Time: 2017-03-13
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 661915
Activity Date/Time: 2017-11-14
Description:

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

Activity Log 3

CC ID: 718272
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 720805
Activity Date/Time: 2018-02-13
Description:

Partial upload to move data access links to Distribution Info.

Technical Environment

Description:

Microsoft Windows 7 Version 6.1 (Build 7600); ArcMap 10.3; ArcCatalog 10.3; TerraScan ver. 16.01; TerraModeler ver. 16.01; Geocue 2014.1.21; LP360 2015.1. Approximate size of entire delivery dataset = 400 GB

Data Quality

Horizontal Positional Accuracy:

Compiled to meet 0.36 m (1.18 feet) horizontal accuracy at 95 percent confidence level.; Quantitative Value: 0.36 meters, Test that produced the value: Lidar system specifications are available in the project report

Vertical Positional Accuracy:

LAS data covering the Martin County QL2 Lidar Task Order was compared to independent survey control points to determine the NVA of the LAS Swath and of the Bare-Earth DEM. In addition, this LAS data was compared to independent VVA points. LAS Swath Non-Vegetated Vertical Accuracy (NVA) Tested 0.07 m (0.243 US feet) Non vegetated vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open terrain using 0.038 m (0.124 US feet) (RMSEz) x 1.96000 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines. Bare-Earth DEM Non-Vegetated Vertical Accuracy (NVA) Tested 0.08 m (0.264 US feet) Non vegetated vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open terrain using 0.04 m (0.135 US feet) (RMSEz) x 1.96000 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines. Relative accuracy also known as "between swath" accuracy was tested through a series of well distributed flight line overlap locations. The relative accuracy for the Martin County Florida QL2 Lidar tested at 0.03 m (0.099 US ft) RMSDz.; Quantitative Value: 0.07 meters, Test that produced the value: LAS Swath Non-Vegetated Vertical Accuracy (NVA) Tested 0.07 m (0.243 US feet) Non vegetated vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open terrain using (RMSEz) x 1.96000 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines and tested against the TIN using ground points. ; Quantitative Value: 0.08 meters, Test that produced the value: Bare-Earth DEM Non-Vegetated Vertical Accuracy (NVA) Tested 0.08 m (0.264 US feet) Non-Vegetated vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open terrain using (RMSEz) x 1.96000 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines and tested against the DEM.; Quantitative Value: 0.196 meters, Test that produced the value: Vegetated Vertical Accuracy (VVA) Tested 0.196 m (0.642 US feet) at the 95th percentile reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines and tested against the DEM. VVA Errors larger than 95th percentile include:

Point 3023, Easting 761568.448, Northing 1028270.720, Z-Error 0.998 US feet

Completeness Report:

The lidar data is visually inspected for completeness to ensure that are no void areas or missing data.

Conceptual Consistency:

All formatted data cover the entire area specified for this project and are validated using a combination of commercial lidar processing software, GIS software, and proprietary programs to ensure proper formatting and loading prior to delivery.

Lineage

Sources

Lidar acquisition

CC ID: 1150326
Publish Date: 2016-07-01
Extent Type: Discrete
Extent Start Date/Time: 2016-01-16
Source Contribution:

This data set is the project specified acquired point cloud data. | Type of Source Media: Lidar dataset

Lidar deliverable processing

CC ID: 1150327
Publish Date: 2016-07-01
Extent Type: Discrete
Extent Start Date/Time: 2016-01-17
Source Contribution:

This data set is the project specified lidar deliverables. | Type of Source Media: Lidar dataset

Survey Control Acquisition

CC ID: 1150328
Publish Date: 2016-07-01
Extent Type: Discrete
Extent Start Date/Time: 2015-12-15
Source Contribution:

This data set is the project specified acquired ground control and QAQC control data. | Type of Source Media: Control dataset

Process Steps

Process Step 1

CC ID: 1150329
Description:

Using a Leica ALS80 (lidar) systems on board a Woolpert aircraft, high density data, at a nominal pulse spacing (NPS) of 0.7 meters, were collected for this task order (approximately 556 square miles). Leica Specs- AGL = 1,981 meters - Aircraft Speed = 150 Knots, Field of View (Full) = 40 degrees, Pulse Rate = 545 kHz, Scan Rate = 51.0 Hz, with an average side lap of 25%. Multiple returns were recorded for each laser pulse along with an intensity value for each return. Four (4) missions were flown between January 16, 2015 and January 23, 2016. Global Navigation Satellite System (GNSS) Base Stations were used in support of the lidar data acquisition. Specific information regarding latitude, longitude, and ellipsoid height to the L1 phase center is included in the lidar processing report. Data for the task order is referenced to the NAD83(2011) StatePlane Florida East FIPS 4100 US Survey Feet, and NAVD88 in US Survey Feet. The geoid used to reduce satellite derived elevations to orthometric heights was GEOID12B. Once the data acquisition and GPS processing phases are complete, the lidar data was processed immediately to verify the coverage had no voids. The GPS and IMU data was post processed using differential and Kalman filter algorithms to derive a best estimate of trajectory. The quality of the solution was verified to be consistent with the accuracy requirements of the project. The SBET was used to reduce the lidar slant range measurements to a raw reflective surface for each flight line. The coverage was classified to extract a bare earth digital elevation model (DEM) and separate last returns. The ALS80 calibration and system performance is verified on a periodic basis using Woolpert's calibration range. The calibration range consists of a large building and runway. The edges of the building and control points along the runway have been located using conventional survey methods. Inertial measurement unit (IMU) misalignment angles and horizontal accuracy are calculated by comparing the position of the building edges between opposing flight lines. The scanner scale factor and vertical accuracy is calculated through comparison of lidar data against control points along the runway. Field calibration is performed on all flight lines to refine the IMU misalignment angles. IMU misalignment angles are calculated from the relative displacement of features within the overlap region of adjacent (and opposing) flight lines. The raw lidar data is reduced using the refined misalignment angles.

Process Date/Time: 2016-01-17 00:00:00

Process Step 2

CC ID: 1150330
Description:

The field crew utilized Real-Time Kinematic (RTK) GPS surveying throughout most of the ground control data collection process. The survey was conducted using a 1-second epoch rate, in a fixed solution RTK mode, with each observation lasting between 60 to 180 seconds. Each station was occupied twice to insure the necessary horizontal and vertical accuracies were being met for this photogrammetric project.

Process Date/Time: 2015-12-18 00:00:00

Process Step 3

CC ID: 1150331
Description:

The individual flight lines were inspected to ensure the systematic and residual errors have been identified and removed. Then, the flight lines were compared to adjacent flight lines for any mismatches to obtain a homogenous coverage throughout the project area. The point cloud underwent a classification process to determine bare-earth points and non-ground points utilizing "first and only" as well as "last of many" lidar returns. This process determined Default (Class 1), Ground (Class 2), Low Noise (Class 7), Water (Class 9), Ignored Ground (Class 10), Bridge Decks (Class 17) and High Noise (Class 18). The bare-earth (Class 2 - Ground) lidar points underwent a manual QA/QC step to verify the quality of the DEM as well as a peer-based QC review. This included a review of the DEM surface to remove artifacts and ensure topographic quality. Classification of water (class 9) and ignored ground (class 10) was completed via the use of the hydrologic breaklines collected for the hydro-flattening phase. The overlap classes were determined by first identifying the overlapping areas and reclassifying the LAS data by offset from a corridor. This allows the returns located on the edge of the swath to be removed from the bare earth coverage in an effort to produce a more uniform data density. The returns determined to be overlap including overlap default, ground, water, and ignored ground are then applied an overlap flag and reclassified to their respective standard classification value. The surveyed ground control points are used to make vertical adjustments to the data set and to perform the accuracy checks and statistical analysis of the lidar dataset. Supervisory QC monitoring of work in progress and completed editing ensured consistency of classification character and adherence to project requirements across the entire project area. The resulting deliverables for this task order consist of classified LAS file in LAS 1.4 format, Raw Swath LAS files in LAS 1.4 format, 4 feet pixel size DEM files in ERDAS IMG format, 8-bit Intensity files in GeoTIFF format, and Hydrologic Breakline data in ESRI .GDB format.

Process Date/Time: 2016-01-17 00:00:00

Process Step 4

CC ID: 1150332
Description:

The NOAA Office for Coastal Management (OCM) received 768 files in IMG format from Martin County, Florida. The DEM files contained elevation measurements in Florida State Plane East horizontal coordinates (feet) with vertical elevations referenced to NAVD88 (Geoid 12b) in feet. OCM performed the following processing on the data for Digital Coast storage and provisioning purposes: 1. GDAL translate was used to convert to cloud optimized geotiff format. 2. The files were ingested into the Digital Coast Data Access Viewer.

Process Date/Time: 2023-08-15 00:00:00
Process Contact: NOAA Office for Coastal Management (NOAA/OCM)
Phone (Voice): (843) 740-1202
Email Address: coastal.info@noaa.gov

Catalog Details

Catalog Item ID: 49422
GUID: gov.noaa.nmfs.inport:49422
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:13+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2023-10-17 16:12+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