2016 USGS Lidar: Tishomingo, MS

Title:	2016 USGS Lidar: Tishomingo, MS
Short Name:	ms2016_tish_m8563_metadata
Status:	Completed
Publication Date:	2016-11-14
Abstract:	These lidar data are processed Classified LAS 1.4 files, for the north and south AOIs for the 2016 Mississippi QL2 Lidar project. The area covers fifteen whole and partial counties in north eastern and south central Mississippi, covering approximately 3825 total square miles in the project area. North AOI (Northeast MS): 2949 individual 1500 m x 1500 m tiles Northern AOI counties: Alcorn, Benton, Itawamba, Lee, Lowendes, Marshall, Monroe, Prentiss, Tippah, Tishomingo, and Union, covering approximately 2318 square miles of the 3825 total square mile project area. The data for counties in the northern AOI were developed based on a horizontal projection/datum of NAD83 (2011) UTM Zone 16, meters and vertical datum of NAVD1988 (Geoid 12B), meters. In order to post process the lidar data to meet task order specifications and meet ASPRS vertical accuracy guidelines, Quantum Spatial, Inc. established a total of 59 ground control points that were used to calibrate the lidar to known ground locations established throughout the Mississippi project area. One point was removed due to drastic change in the area. An additional 96 independent accuracy checkpoints, 56 in Bare Earth and Urban landcovers (56 NVA points), 40 in Forested, Shrubs, and Tall Weeds categories (40 VVA points), were used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data. Vertical Accuracy = 4.9 cm RMSE South AOI (Camp Shelby): 1791 individual 5,000-foot x 5,000-foot tiles Southern AOI counties: Forrest, Greene, Lamar, and Perry, covering approximately 1507 square miles of the 3825 total square mile project area. The data for counties in the southern AOI were developed based on a horizontal projection/datum of NAD83 (2011) State Plane Mississippi East Zone, US survey feet and vertical datum of NAVD1988 (Geoid 12B), US survey feet. In order to post process the lidar data to meet task order specifications and meet ASPRS vertical accuracy guidelines, Quantum Spatial, Inc. established a total of 38 ground control points that were used to calibrate the lidar to known ground locations established throughout the Mississippi project area. An additional 78 independent accuracy checkpoints, 43 in Bare Earth and Urban landcovers (43 NVA points), 35 in Forested, Shrubs, and Tall Weeds categories (35 VVA points), were used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data. One point was removed from the NVA calculations due to drastic change in the area. Vertical Accuray = 4.6 cm RMSE Dataset Description: The Mississippi 2016 Aerial LiDAR Mapping project called for the planning, acquisition, processing and derivative products of LIDAR data to be collected at an aggregate nominal pulse spacing (NPS) of 0.7 meters. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base LIDAR Specification, Version 1.2. LiDAR data was delivered in RAW flight line swath format. Corresponding 2.5-foot intensity images in GeoTIFF format and 2.5-foot bare-earth DEM files in ERDAS .IMG format were created with the same tile schema. Tiles names follow the US National Grid naming schema. Hydro-flattened breaklines were produced in Esri file geodatabase format. Continuous contours with a 1-foot interval were produced in Esri file geodatabase format. Ground Conditions: Lidar was collected in winter of 2016, while no snow was on the ground and rivers were at or below normal levels The NOAA Office for Coastal Management (OCM) received the data for processing to the Data Access Viewer (DAV) and https. In addition to the lidar point data, the bare earth Digital Elevation Models (DEM) created from the lidar point data are also available from the DAV. These data are available for custom download at the link provided in the URL section of this metadata record. Hydro breaklines are also available. These data are also available for download at the link provided in the URL section of this metadata record. Please note that these 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 or OCM.
Purpose:	To acquire detailed surface elevation data for use in conservation planning, design, research, floodplain mapping, dam safety assessments and elevation modeling, etc. Classified LAS files are used to show the manually reviewed bare earth surface. This allows the user to create intensity images, breaklines and raster DEMs. The purpose of these lidar data was to produce high accuracy 3D hydro-flattened digital elevation models (DEMs) with a 2.5 foot cell size. These raw lidar point cloud data were used to create classified lidar LAS files, intensity images, 3D breaklines, hydro-flattened DEMs, and contours as necessary.
Supplemental Information:	USGS Contract No.: G16PC00016 CONTRACTOR: Quantum Spatial, Inc. SUBCONTRACTOR: Woolpert. Lidar data were acquired by Quantum Spatial, Inc. and Woolpert. All follow-on processing was completed by the prime contractor. The following are the USGS lidar fields in JSON: { "ldrinfo" : { "ldrspec" : "USGS-NGP Base Specification v1.2", "ldrsens" : "Leica ALS 70", "ldrmaxnr" : "4", "ldrnps" : "0.68", "ldrdens" : "2.14", "ldranps" : "0.68", "ldradens" : "2.14", "ldrfltht" : "2000", "ldrfltsp" : "170", "ldrscana" : "40.0", "ldrscanr" : "53.4", "ldrpulsr" : "273.0", "ldrpulsd" : "4", "ldrpulsw" : "0.26", "ldrwavel" : "1064", "ldrmpia" : "1", "ldrbmdiv" : "0.45", "ldrswatw" : "1455.88", "ldrswato" : "11.27", "ldrgeoid" : "g2012bu0.bin" }, "ldrinfo_80" : { "ldrspec" : "USGS-NGP Base Specification v1.2", "ldrsens" : "Leica ALS 80", "ldrmaxnr" : "4", "ldrnps" : "0.69", "ldrdens" : "2.13", "ldranps" : "0.69", "ldradens" : "2.14", "ldrfltht" : "2000", "ldrfltsp" : "170", "ldrscana" : "40.0", "ldrscanr" : "39.0", "ldrpulsr" : "271.0", "ldrpulsd" : "4", "ldrpulsw" : "0.45", "ldrwavel" : "1064", "ldrmpia" : "1", "ldrbmdiv" : "0.22", "ldrswatw" : "1455.88", "ldrswato" : "17.85", "ldrgeoid" : "g2012bu0.bin" }, "ldraccur" : { "ldrchacc" : "0.196", "rawnva" : "0.090", "rawnvan" : "42" }, "lasinfo" : { "lasver" : "1.4", "lasprf" : "6", "laswheld" : "Withheld (ignore) points were identified in these 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" : "Processed, but Unclassified" }, "lasclass" : { "clascode" : "2", "clasitem" : "Bare-Earth Ground" }, "lasclass" : { "clascode" : "7", "clasitem" : "Low noise" }, "lasclass" : { "clascode" : "9", "clasitem" : "Water" }, "lasclass" : { "clascode" : "10", "clasitem" : "Ignored Ground" }, "lasclass" : { "clascode" : "17", "clasitem" : "Bridge Decks" }, "lasclass" : { "clascode" : "18", "clasitem" : "High noise" } }}

Keywords

Theme Keywords

Theme Keywords
Thesaurus	Keyword
Global Change Master Directory (GCMD) Science Keywords	EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
Global Change Master Directory (GCMD) Science Keywords	EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION
ISO 19115 Topic Category	elevation
UNCONTROLLED
None	beach
None	erosion

Spatial Keywords

Spatial Keywords
Thesaurus	Keyword
Global Change Master Directory (GCMD) Location Keywords	CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MISSISSIPPI
Global Change Master Directory (GCMD) Location Keywords	VERTICAL LOCATION > LAND SURFACE

Instrument Keywords

Instrument Keywords
Thesaurus	Keyword
Global Change Master Directory (GCMD) Instrument Keywords	LIDAR > Light Detection and Ranging

Platform Keywords

Platform Keywords
Thesaurus	Keyword
Global Change Master Directory (GCMD) Platform Keywords	Airplane > Airplane

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:	None Planned
Data Presentation Form:	Point Cloud (digital)
Distribution Liability:	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:	Acknowledgement of the U.S. Geological Survey would be appreciated for products derived from these data.

Support Roles

Data Steward

CC ID: 762072

Date Effective From:	2018
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: 762073

Date Effective From:	2018
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: 762074

Date Effective From:	2018
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: 762075

Date Effective From:	2018
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: 1141481

W° Bound:	-89.66455797017
E° Bound:	-88.094
N° Bound:	35.004699
S° Bound:	30.901302

Extent Group 1 / Time Frame 1

CC ID: 1141480

Time Frame Type:	Range
Start:	2016-01-17
End:	2016-02-11

Access Information

Security Class:	Unclassified
Data Access Procedure:	Data is available online for bulk and custom downloads.
Data Access Constraints:	None
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.

Distribution Information

Distribution 1

CC ID: 762079

Download URL:	https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=8563
Distributor:
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.
Compression:	Zip

Distribution 2

CC ID: 762080

Download URL:	https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/8563/index.html
Distributor:
File Name:	Bulk Download
Description:	Bulk download of data files in LAZ format, geographic coordinates, orthometric heights. Note that the vertical datum (hence elevations) of the files here are different than described in this document.
File Type (Deprecated):	LAZ
Distribution Format:	LAS/LAZ - LASer
Compression:	Zip

URLs

URL 1

CC ID: 762068

URL:	https://coast.noaa.gov/
Name:	NOAA's Office for Coastal Management (OCM) website
URL Type:	Online Resource
File Resource Format:	HTML
Description:	Information on the NOAA Office for Coastal Management (OCM)

URL 2

CC ID: 762069

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 3

CC ID: 762070

URL:	https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/8563/supplemental/ms2016_tish_m8563.kmz
Name:	Browse graphic
URL Type:	Browse Graphic
File Resource Format:	KML
Description:	This graphic displays the footprint for this lidar data set.

URL 4

CC ID: 762071

URL:	https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/8563/supplemental/28212_Mississippi_ProjectReport.pdf
Name:	Dataset report
URL Type:	Online Resource
File Resource Format:	PDF
Description:	Link to data set report.

URL 5

CC ID: 763342

URL:	https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=8567
URL Type:	Online Resource
Description:	Link to custom download, from the Data Access Viewer (DAV), the raster Digital Elevation Model (DEM) data that were created from this lidar data set.

URL 6

CC ID: 763343

URL:	https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/8563/supplemental/28212_Mississippi_ProjectReportAppendices.pdf
URL Type:	Online Resource
Description:	Link to data set report appendices.

URL 7

CC ID: 763344

URL:	https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/8563/breaklines/
URL Type:	Online Resource
Description:	Link to download the breaklines for this data set.

Data Quality

Vertical Positional Accuracy:	The project specifications require that only Non-Vegetated Vertical Accuracy (NVA) be computed for raw lidar point cloud swath files. The required accuracy (ACCz) is: 19.6 cm at a 95% confidence level, derived according to NSSDA, i.e., based on RMSE of 10 cm in the “bare earth” and “urban” land cover classes. The NVA was tested with 56 checkpoints in the North AOI and 42 checkpoints in the South AOI, all located in bare earth and urban (non-vegetated) areas. These check points were not used in the calibration or post processing of the lidar point cloud data. The checkpoints were distributed throughout the project area and were surveyed using GPS techniques. Elevations from the unclassified lidar surface were measured for the x,y location of each check point. Elevations interpolated from the lidar surface were then compared to the elevation values of the surveyed control points. AccuracyZ has been tested to meet 19.6 cm or better Non- Vegetated Vertical Accuracy at 95% confidence level using RMSE(z) x 1.9600 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASRPS Guidelines. Northern AOI NVA is 4.9 cm RMSE; VVA is 15.4 cm RMSE Southern AOI NVA is 4.6 cm RMSE; VVA is 9.5 cm RMSE
Completeness Report:	These LAS data files include 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 Non-Vegetated Vertical Accuracy specifications.
Conceptual Consistency:	Data covers the entire area specified for this project.

Vertical Positional Accuracy:

The project specifications require that only Non-Vegetated Vertical Accuracy (NVA) be computed for raw lidar point cloud swath files. The required accuracy (ACCz) is: 19.6 cm at a 95% confidence level, derived according to NSSDA, i.e., based on RMSE of 10 cm in the “bare earth” and “urban” land cover classes. The NVA was tested with 56 checkpoints in the North AOI and 42 checkpoints in the South AOI, all located in bare earth and urban (non-vegetated) areas. These check points were not used in the calibration or post processing of the lidar point cloud data. The checkpoints were distributed throughout the project area and were surveyed using GPS techniques.

Elevations from the unclassified lidar surface were measured for the x,y location of each check point. Elevations interpolated from the lidar surface were then compared to the elevation values of the surveyed control points. AccuracyZ has been tested to meet 19.6 cm or better Non-

Vegetated Vertical Accuracy at 95% confidence level using RMSE(z) x 1.9600 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASRPS Guidelines.

Northern AOI NVA is 4.9 cm RMSE; VVA is 15.4 cm RMSE

Southern AOI NVA is 4.6 cm RMSE; VVA is 9.5 cm RMSE

Completeness Report:

These LAS data files include 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 Non-Vegetated Vertical Accuracy specifications.

Conceptual Consistency:

Data covers the entire area specified for this project.

Lineage

Process Steps

Process Step 1

CC ID: 1141477

Description:	LAS Point Classification: The point classification is performed as described below. The bare earth surface is then manually reviewed to ensure correct classification on the Class 2 (Ground) points. After the bare-earth surface is finalized, it is then used to generate all hydro-breaklines through heads-up digitization. All ground (ASPRS Class 2) lidar data inside of the Lake Pond and Double Line Drain hydro-flattened breaklines were then classified to Water (ASPRS Class 9) using TerraScan macro functionality. A buffer of 3 feet was also used around each hydro-flattened feature to classify these ground (ASPRS Class 2) points to Ignored ground (ASPRS Class 10). All Lake Pond Island and Double Line Drain Island features were checked to ensure that the ground (ASPRS Class 2) points were reclassified to the correct classification after the automated classification was completed. All overlap data was processed through automated functionality provided by TerraScan to classify the overlapping flight line data to approved classes by USGS. The overlap data was classified using standard LAS overlap bit. These classes were created through automated processes only and were not verified for classification accuracy. Due to software limitations within TerraScan, these classes were used to trip the withheld bit within various software packages. These processes were reviewed and accepted by USGS through numerous conference calls and pilot study areas. All data was manually reviewed and any remaining artifacts removed using functionality provided by TerraScan and TerraModeler. Global Mapper us used as a final check of the bare earth dataset. GeoCue was then used to create the deliverable industry-standard LAS files for both the All Point Cloud Data and the Bare Earth. Quantum Spatial, Inc. proprietary software was used to perform final statistical analysis of the classes in the LAS files, on a per tile level to verify final classification metrics and full LAS header information.
Process Date/Time:	2016-01-01 00:00:00

Description:

LAS Point Classification: The point classification is performed as described below. The bare earth surface is then manually reviewed to ensure correct classification on the Class 2 (Ground) points. After the bare-earth surface is finalized, it is then used to generate all hydro-breaklines through heads-up digitization. All ground (ASPRS Class 2) lidar data inside of the Lake Pond and Double Line Drain hydro-flattened breaklines were then classified to Water (ASPRS Class 9) using TerraScan macro functionality. A buffer of 3 feet was also used around each hydro-flattened feature to classify these ground (ASPRS Class 2) points to Ignored ground (ASPRS Class 10). All Lake Pond Island and Double Line Drain Island features were checked to ensure that the ground (ASPRS Class 2) points were reclassified to the correct classification after the automated classification was completed. All overlap data was processed through automated functionality provided by TerraScan to classify the overlapping flight line data to approved classes by USGS. The overlap data was classified using standard LAS overlap bit. These classes were created through automated processes only and were not verified for classification accuracy. Due to software limitations within TerraScan, these classes were used to trip the withheld bit within various software packages. These processes were reviewed and accepted by USGS through numerous conference calls and pilot study areas. All data was manually reviewed and any remaining artifacts removed using functionality provided by TerraScan and TerraModeler. Global Mapper us used as a final check of the bare earth dataset. GeoCue was then used to create the deliverable industry-standard LAS files for both the All Point Cloud Data and the Bare Earth. Quantum Spatial, Inc. proprietary software was used to perform final statistical analysis of the classes in the LAS files, on a per tile level to verify final classification metrics and full LAS header information.

Process Date/Time:

2016-01-01 00:00:00

Process Step 2

CC ID: 1141478

Description:	The NOAA Office for Coastal Management (OCM) received the las files from MS State University. The files contained elevation and intensity measurements for the Tishomingo project area in Mississippi. There were 2 AOIs in the project, a northern AOI and a southern AOI. The data in the northern AOI were in UTM Zone 16 North coordinates and NAVD88 (Geoid12B) elevations in meters. One file in the northern AOI was found to be corrupt and a valid replacement file was downloaded from the USGS rockyftp site (ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/Elevation/LPC/Projects/USGS_LPC_MS_Tishomingo_North_2016_LAS_2017/laz/). The data in the southern AOI were in MS State Plane East, US Survey Feet coordinates and NAVD88 (Geoid12B) elevations in feet. The data were classified as: 1 - Unclassified, 2 - Ground, 7 - Low Noise, 9 - Water, 10 - Ignored Ground, 17- Bridge Deck, 18 - High Noise. The NOAA Office for Coastal Management processed all classifications of points to the Digital Coast Data Access Viewer (DAV). Classes available on the DAV are: 1, 2, 7, 9, 10, 17, 18. OCM performed the following processing on the data for Digital Coast storage and provisioning purposes: 1. Laszip was run to convert the las formatted files to laz format. 2. The LAStools software scripts lasinfo and lasvalidate were run on the laz files to check for errors. 3. An internal OCM script was run to check the number of points by classification and by flight ID and the gps time and intensity ranges. 4. Internal OCM scripts were run on the laz files to convert from NAVD88 elevations to ellipsoid elevations using the Geoid 12B model, to convert from UTM Zone 16 coordinates (Northern AOI data) and MS State Plane East coordinates (Southern AOI data) to geographic coordinates, to convert from elevations in ft (Southern AOI data) to meters, to assign the geokeys, to sort the data by gps time and zip the data to database and to http.
Process Date/Time:	2018-07-12 00:00:00
Process Contact:	Office for Coastal Management (OCM)
ROR:	https://ror.org/05v14bq57

Catalog Details

Catalog Item ID:	53056
GUID:	gov.noaa.nmfs.inport:53056
Metadata Record Created By:	Rebecca Mataosky
Metadata Record Created:	2018-07-12 13:38+0000
Metadata Record Last Modified By:	SysAdmin InPortAdmin
Metadata Record Last Modified:	2026-03-04 19:17+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

Item Identification