2015 USGS Lidar DEM: 3DEP Co-Op South Central MS

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Woolpert

Originator: Mississippi Department of Environmental Quality (MDEQ)

Originator:

Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office for Coastal Management (OCM)

Publication_Date: 20170713

Title: 2015 USGS Lidar DEM: 3DEP Co-Op South Central MS

Publication_Information:

Publication_Place: Charleston, SC

Publisher: NOAA's Ocean Service, Office for Coastal Management (OCM)

Online_Linkage: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6307

Online_Linkage:

https://coast.noaa.gov/htdata/raster2/elevation/MS_3DEP_COOP_DEM_2015_6307

Online_Linkage: https://coast.noaa.gov/dataviewer

Online_Linkage: https://coast.noaa.gov/dataregistry

Online_Linkage: https://coast.noaa.gov

Description:

Abstract:

Mississippi Coastal QL2 Lidar with 3DEP Extension Lidar 0.7m NPS Lidar Data Acquisition and Processing Production Task USGS Contract No. G10PC00057 Task Order No. G15PD00091 Woolpert Order No. 75157 CONTRACTOR: Woolpert, Inc. This metadata record describes the 1m bare earth Digital Elevation Models (DEMs)for the following counties in Mississippi: Copiah, Lawrence, Lincoln, Pike, and Simpson. This task is for a high resolution data set of lidar covering approximately 5981 square miles. The lidar data was acquired and processed in compliance to U.S. Geological Survey National Geospatial Program Lidar Base Specification version 1.2. The lidar data was acquired and processed under the requirements identified in this task order. 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, one (1) meter pixel raster DEMs of the bare-earth surface in ERDAS IMG Format, and 8-bit intensity images. Gridded products conform to a 1500 m x 1500 m tiling scheme. Each LAS file contains lidar point information, which has been calibrated, controlled, and classified. Additional deliverables include hydrologic breakline data, control data, flight line vectors 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. Ground conditions: Water at normal levels; no unusual inundation; no snow; leaf off.
In addition to the bare earth DEMs, the topobathy lidar point data are also available. These data are available for custom download here: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6306 Breaklines created from the lidar area also available for download in both gdb and gpkg format at: https://coast.noaa.gov/htdata/lidar2_z/geoid12b/data/6306/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.

Purpose:

The purpose of this project is for lidar mapping services in support of the USGS for task name Mississippi Coastal QL2 Lidar with 3DEP Extension Lidar Task Order

Supplemental_Information:

The Mississippi Coastal QL2 Lidar with 3DEP Extension Lidar Report, may be accessed here: https://coast.noaa.gov/htdata/lidar2_z/geoid12b/data/6306/supplemental/ms2015_usgs_3dep_coop_m6306_lidar_report.pdf
The Mississippi Coastal QL2 Lidar with 3DEP Extension Ground Control Survey Report, may be accessed here: https://coast.noaa.gov/htdata/lidar2_z/geoid12b/data/6306/supplemental/ms2015_usgs_3dep_coop_m6306_survey_report.pdf

Time_Period_of_Content:

Time_Period_Information:

Multiple_Dates/Times:

Single_Date/Time:

Calendar_Date: 20150128

Single_Date/Time:

Calendar_Date: 20150129

Single_Date/Time:

Calendar_Date: 20150130

Single_Date/Time:

Calendar_Date: 20150131

Single_Date/Time:

Calendar_Date: 20150227

Single_Date/Time:

Calendar_Date: 20150228

Single_Date/Time:

Calendar_Date: 20150305

Single_Date/Time:

Calendar_Date: 20150306

Single_Date/Time:

Calendar_Date: 20150307

Single_Date/Time:

Calendar_Date: 20150315

Single_Date/Time:

Calendar_Date: 20150316

Single_Date/Time:

Calendar_Date: 20150317

Single_Date/Time:

Calendar_Date: 20150318

Single_Date/Time:

Calendar_Date: 20150322

Single_Date/Time:

Calendar_Date: 20150323

Single_Date/Time:

Calendar_Date: 20150324

Single_Date/Time:

Calendar_Date: 20150326

Single_Date/Time:

Calendar_Date: 20150327

Single_Date/Time:

Calendar_Date: 20150328

Single_Date/Time:

Calendar_Date: 20150401

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -90.738533

East_Bounding_Coordinate: -89.652040

North_Bounding_Coordinate: 32.050978

South_Bounding_Coordinate: 30.999053

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: elevation

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: Bathymetry/Topography

Theme_Keyword: Lidar

Theme_Keyword: Elevation

Theme_Keyword: Topography

Theme_Keyword: DEM

Theme_Keyword: IMG

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: United States

Place_Keyword: Mississippi

Place_Keyword: Copiah County

Place_Keyword: Lawrence County

Place_Keyword: Lincoln County

Place_Keyword: Pike County

Place_Keyword: Simpson County

Access_Constraints: No restrictions apply to this 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. Users should not use these data for critical applications without a full awareness of its limitations. Acknowledgement of the U.S. Geological Survey would be appreciated for products derived from these data.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Woolpert

Contact_Address:

Address_Type: mailing and physical

Address: 4454 Idea Center Blvd

City: Dayton

State_or_Province: OH

Postal_Code: 45430

Country: USA

Contact_Voice_Telephone: (937) 461-5660

Contact_Facsimile_Telephone: (937) 461-0743

Hours_of_Service: 8:00 a.m. to 5:00 p.m. Eastern Standard Time

Browse_Graphic:

Browse_Graphic_File_Name:

https://coast.noaa.gov/htdata/lidar2_z/geoid12b/data/6306/supplemental/ms2015_usgs_3dep_coop_m6306.kmz

Browse_Graphic_File_Description:

This graphic shows the lidar footprint for the 2015 USGS 3DEP Co-Op MS project.

Browse_Graphic_File_Type: kmz

Data_Set_Credit:

Acknowledgement of the U.S. Geological Survey would be appreciated for products derived from these data.

Native_Data_Set_Environment:

Microsoft Windows 7 Version 6.1 (Build 7600); ArcMap 10.2; ArcCatalog 10.2; TerraScan ver. 15.01; TerraModeler ver. 15.01; Geocue 2014.1.21; LP360 2014.1. Approximate size of entire delivery dataset = 3.0TB

Data_Quality_Information:

Logical_Consistency_Report:

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.

Completeness_Report:

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

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Compiled to meet 0.36 meters horizontal accuracy at 95 percent confidence level.

Quantitative_Horizontal_Positional_Accuracy_Assessment:

Horizontal_Positional_Accuracy_Value: 0.36

Horizontal_Positional_Accuracy_Explanation: Lidar system specifications are available in the project report

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

LAS data covering the Mississippi Coastal QL2 Lidar with 3DEP Extension 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. Raw LAS Swath Non-Vegetated Vertical Accuracy (NVA) Tested 0.176 meters non-vegetated vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open terrain using 0.090 meters (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 0.164 meters non-vegetated vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open terrain using 0.084 meters (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.

Quantitative_Vertical_Positional_Accuracy_Assessment:

Vertical_Positional_Accuracy_Value: 0.176

Vertical_Positional_Accuracy_Explanation:

Raw Swath Non-Vegetated Vertical Accuracy (NVA) Tested 0.176 meters 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 all points.

Quantitative_Vertical_Positional_Accuracy_Assessment:

Vertical_Positional_Accuracy_Value: 0.164

Vertical_Positional_Accuracy_Explanation:

Bare-Earth DEM Non-Vegetated Vertical Accuracy (NVA) Tested 0.164 meters 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_Vertical_Positional_Accuracy_Assessment:

Vertical_Positional_Accuracy_Value: 0.239

Vertical_Positional_Accuracy_Explanation:

Vegetated Vertical Accuracy (VVA) Tested 0.239 meters 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 3017, Easting 814793.008, Northing 3535747.708, Z-Error 0.308 meters Point 3031, Easting 725518.905, Northing 3472151.735, Z-Error 0.296 meters Point 3041, Easting 780357.999, Northing 3545844.660, Z-Error 0.241 meters

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Woolpert

Publication_Date: 20151231

Title: Lidar acquisition

Publication_Information:

Publication_Place: Dayton, OH

Publisher: Woolpert Geospatial Services

Type_of_Source_Media: Lidar dataset

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 20150128

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation:

Mississippi Coastal QL2 Lidar with 3DEP Extension - Lidar acquisition

Source_Contribution:

This data set is the project specified acquired point cloud data.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Woolpert

Publication_Date: 20151231

Title: Survey Control Acquisition

Publication_Information:

Publication_Place: Dayton, OH

Publisher: Woolpert Geospatial Services

Type_of_Source_Media: Control dataset

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 20150217

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation:

Mississippi Coastal QL2 Lidar with 3DEP Extension - Survey Control Acquisition

Source_Contribution:

This data set is the project specified acquired ground control and QAQC control data.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Woolpert

Publication_Date: 20151231

Title: Lidar deliverable processing

Publication_Information:

Publication_Place: Dayton, OH

Publisher: Woolpert Geospatial Services

Type_of_Source_Media: Lidar dataset

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 20150128

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation:

Mississippi Coastal QL2 Lidar with 3DEP Extension - Lidar deliverable processing

Source_Contribution: This data set is the project specified lidar deliverables.

Process_Step:

Process_Description:

Lidar Acquisition Using two Leica ALS70 (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 5981 square miles). Leica Specs- AGL = 1,981 meters - Aircraft Speed = 150 Knots, Field of View (Full) = 40 degrees, Pulse Rate = 272 kHz, Scan Rate = 41.0 Hz, with an average side lap of 20%. Multiple returns were recorded for each laser pulse along with an intensity value for each return. Thirty-one (31) missions were flown between January 28, 2015 and April 01, 2015. Six (6) 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 UTM Zone 15N, North American Datum of 1983 (2011), and NAVD88, in meters. 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 ALS70 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: 20150128

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Woolpert, Inc.

Contact_Position: Geospatial Services

Contact_Address:

Address_Type: mailing and physical

Address: 4454 Idea Center Blvd.

City: Dayton

State_or_Province: OH

Postal_Code: 45430

Country: USA

Contact_Voice_Telephone: (937) 461-5660

Contact_Facsimile_Telephone: (937) 461-0743

Hours_of_Service: 8:00 a.m. to 5:00 p.m. Eastern Time

Process_Step:

Process_Description:

Lidar ground control and QAQC control Acquisition The field crew utilized Real-Time Kinematic (RTK) GPS surveying throughout most of the ground control data collection process. Using RTK GPS techniques, observations were performed on a total of 89 LiDAR control points and 470 ground control quality check points. 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: 20150217

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Woolpert, Inc.

Contact_Position: Geospatial Services

Contact_Address:

Address_Type: mailing and physical

Address: 4454 idea Center Blvd.

City: Dayton

State_or_Province: OH

Postal_Code: 45430

Country: USA

Contact_Voice_Telephone: (937) 461-5660

Contact_Facsimile_Telephone: (937) 461-0743

Hours_of_Service: 8:00 a.m. to 5:00 p.m. Eastern Time

Process_Step:

Process_Description:

Lidar Deliverable Processing 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 homogeneous 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, 1 meter pixel size DEM files in ERDAS IMG format, 1 meter pixel size 8-bit Intensity files in GeoTIFF format, and Hydrologic Breakline data in ESRI shape file format. The method used to create the DEM consisted of isolating the ground (class 2) points and introducing 3-d breakline data derived from delineating hydrologic features and applying USGS v1.2 hydro flattening specification z-values. This combined dataset was then processed into a gridded format for additional QAQC to ensure DEM quality. Following QAQC process completion, a gridded raster file was created on a per tile basis. The task order projection information was applied to the final raster dataset. Prior to delivery, all raster files were visually reviewed to ensure coverage and reviewed using automated processes to ensure proper formatting.

Process_Date: 20150128

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Woolpert, Inc.

Contact_Position: Geospatial Services

Contact_Address:

Address_Type: mailing and physical

Address: 4454 Idea Center Blvd.

City: Dayton

State_or_Province: OH

Postal_Code: 45430

Country: USA

Contact_Voice_Telephone: (937) 461-5660

Contact_Facsimile_Telephone: (937) 461-0743

Hours_of_Service: 8:00 a.m. to 5:00 p.m. Eastern Time

Process_Step:

Process_Description:

The NOAA Office for Coastal Management (OCM) received the data in img format. The bare earth raster files were at a 1 m grid spacing. The data were in UTM Zone 15 and UTM Zone 16 coordinates and NAVD88 elevations in meters. OCM copied the raster files to database and https for Digital Coast storage and provisioning purposes.

Process_Date: 20170613

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NOAA Office for Coastal Management (OCM)

Contact_Address:

Address_Type: mailing and physical

Address: 2234 South Hobson Avenue

City: Charleston

State_or_Province: SC

Postal_Code: 29405-2413

Country: US

Contact_Voice_Telephone: 843-740-1202

Contact_Electronic_Mail_Address: coastal.info@noaa.gov

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: NAD 1983 2011 UTM Zone 15N

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996

Longitude_of_Central_Meridian: -93.0

Latitude_of_Projection_Origin: 0.0

False_Easting: 500000.0

False_Northing: 0.0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column

Coordinate_Representation:

Abscissa_Resolution: 0.01

Ordinate_Resolution: 0.01

Planar_Distance_Units: meter

Planar:

Map_Projection:

Map_Projection_Name: NAD 1983 2011 UTM Zone 16N

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996

Longitude_of_Central_Meridian: -87.0

Latitude_of_Projection_Origin: 0.0

False_Easting: 500000.0

False_Northing: 0.0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column

Coordinate_Representation:

Abscissa_Resolution: 0.01

Ordinate_Resolution: 0.01

Planar_Distance_Units: meter

Geodetic_Model:

Horizontal_Datum_Name: D NAD 1983 2011

Ellipsoid_Name: GRS 1980

Semi-major_Axis: 6378137.0

Denominator_of_Flattening_Ratio: 298.257222101

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Datum_Name: North American Vertical Datum of 1988(GEOID12B)

Altitude_Resolution: 0.000100

Altitude_Distance_Units: meters

Altitude_Encoding_Method:

Explicit elevation coordinate included with horizontal coordinates

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NOAA Office for Coastal Management (OCM)

Contact_Address:

Address_Type: mailing and physical

Address: 2234 South Hobson Avenue

City: Charleston

State_or_Province: SC

Postal_Code: 29405-2413

Country: US

Contact_Voice_Telephone: 843-740-1202

Contact_Electronic_Mail_Address: coastal.info@noaa.gov

Resource_Description: Downloadable Data

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., the U.S. Geological Survey (USGS), the MS Dept of Environmental Quality, NOAA, the NOAA Office for Coastal Management (OCM) or its partners.

Custom_Order_Process:

This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6307

Metadata_Reference_Information:

Metadata_Date: 20170630

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NOAA Office for Coastal Management (OCM)

Contact_Address:

Address_Type: mailing and physical

Address: 2234 South Hobson Avenue

City: Charleston

State_or_Province: SC

Postal_Code: 29405-2413

Country: US

Contact_Voice_Telephone: 843-740-1202

Contact_Electronic_Mail_Address: coastal.info@noaa.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998