2016 USACE NCMP Topobathy Lidar DEM: Gulf Coast (TX)

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator:
U.S. Army Corps of Engineers (USACE), JALBTCX (Joint Airborne Lidar Bathymetry Technical Center of eXpertise)
Originator:
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office for Coastal Management (OCM)
Publication_Date: 20170913
Title: 2016 USACE NCMP Topobathy Lidar DEM: Gulf Coast (TX)
Geospatial_Data_Presentation_Form: raster digital data
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=6371
Online_Linkage:
https://coast.noaa.gov/htdata/raster2/elevation/USACE_Gulf_Topobathy_DEM_2016_6371
Online_Linkage: https://coast.noaa.gov/dataviewer
Online_Linkage: https://coast.noaa.gov/dataregistry
Online_Linkage: https://coast.noaa.gov
Description:
Abstract:
These bare earth Digital Elevation Model (DEM) files contain rasterized topobathy lidar elevations at a 1 meter grid size, generated from data collected by the Coastal Zone Mapping and Imaging Lidar (CZMIL) system. CZMIL integrates a lidar sensor with simultaneous topographic and bathymetric capabilities, a digital camera and a hyperspectral imager on a single remote sensing platform for use in coastal mapping and charting activities. The 3-D position data are used to generate a series of gridded file products, which are tiled into quarter-quads or 5km boxes. 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=5186 DEMs that were created from all classes of points (1, 2, 29) at a 1 meter grid size are available by request via email at: coastal.info@noaa.gov.
Purpose:
These data were collected as a part of the National Coastal Mapping Program (NCMP) to depict the elevations above and below the water in the coastal zone.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20160909
Ending_Date: 20161010
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -97.477883
East_Bounding_Coordinate: -93.822725
North_Bounding_Coordinate: 29.796392
South_Bounding_Coordinate: 25.938079
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: elevation
Theme_Keyword: imageryBaseMapsEarthCover
Theme_Keyword: oceans
Theme:
Theme_Keyword_Thesaurus: GCMD Earth Sciences Keywords
Theme_Keyword: OCEANS > COASTAL PROCESSES > COASTAL ELEVATION
Theme_Keyword: SOLID EARTH > GEOMORPHOLOGY > COASTAL LANDFORMS/PROCESSES
Theme_Keyword: OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY
Theme_Keyword: EARTH SCIENCE > OCEANS >COASTAL PROCESSES > COASTAL ELEVATION
Theme_Keyword: OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > SEAFLOOR TOPOGRAPHY
Theme_Keyword: HUMAN DIMENSIONS > LAND USE/LAND COVER > LAND USE CLASSES
Theme_Keyword: LAND SURFACE > TOPOGRAPHY> TERRAIN ELEVATION
Theme:
Theme_Keyword_Thesaurus: GCMD Data Center Keywords v7
Theme_Keyword: DOD/USARMY/USACE/SAM/MOBILE/OPJ/JALBTCX > Department of Defense
Theme_Keyword: United States Army
Theme_Keyword: United States Army Corps of Engineers
Theme_Keyword: Mobile District
Theme_Keyword: Spatial Data Branch
Theme_Keyword: Joint Airborne Lidar Bathymetry Technical Center of Expertise
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Bathymetry/Topography
Theme_Keyword:
Joint Airborne Lidar Bathymetry Technical Center of eXpertise (JALBTCX)
Theme_Keyword: National Coastal Mapping Program (NCMP)
Theme_Keyword: IWG-OCM
Theme_Keyword: 1mRaster
Theme_Keyword: Bathymetry
Theme_Keyword: U.S. Army Corps of Engineers (USACE)
Theme_Keyword: Topography
Theme_Keyword: Coastal Zone Mapping Imaging Lidar (CZMIL)
Theme_Keyword: BareEarth
Theme_Keyword: Mobile District
Theme:
Theme_Keyword_Thesaurus: GCMD Instrument Keywords v7
Theme_Keyword: LIDAR > LIGHT DETECTION AND RANGING
Place:
Place_Keyword_Thesaurus: Geographic Names Information System
Place_Keyword: United States
Place_Keyword: Texas
Place:
Place_Keyword_Thesaurus: GCMD Location Keywords v7
Place_Keyword: VERTICAL LOCATION > SEA FLOOR
Place_Keyword: VERTICAL LOCATION > LAND SURFACE
Temporal:
Temporal_Keyword_Thesaurus: None
Temporal_Keyword: September
Temporal_Keyword: October
Temporal_Keyword: 2016
Access_Constraints:
These data have been developed from the best available sources. Although efforts have been made to ensure that the data are accurate and reliable, errors and variable conditions originating from physical sources used to develop the data may be reflected in the data supplied. Users must be aware of these conditions and bear responsibility for the appropriate use of the information with respect to possible errors, scale, resolution, rectification, positional accuracy, development methodology, time period, environmental and climatic conditions and other circumstances specific to these data. The user is responsible for understanding the accuracy limitations of the data provided herein. The burden for determining fitness for use lies entirely with the user. The user should refer to the accompanying metadata notes for a description of the data and data development procedures.
Use_Constraints:
These data depict the heights at the time of the survey and are only accurate for that time. Acknowledgement of the Joint Airborne Lidar Bathymetry Technical Center of eXpertise (JALBTCX) would be appreciated in any publications or derived products. The data herein, including but not limited to geographic data, tabular data, analytical data, electronic data structures or files, are provided "as is" without warranty of any kind, either expressed or implied, or statutory, including, but not limited to, the implied warranties or merchantability and fitness for a particular purpose. The entire risk as to the quality and performance of the data is assumed by the user. No guarantee of accuracy is granted, nor is any responsibility for reliance thereon assumed. In no event shall the U.S. Army Corps of Engineers, Mobile District Office, Spatial Data Branch be liable for direct, indirect, incidental, consequential or special damages of any kind, including, but not limited to, loss of anticipated profits or benefits arising out of use of or reliance on the data. The Spatial Data Branch does not accept liability for any damages or misrepresentation caused by inaccuracies in the data or as a result of changes to the data caused by system transfers or other transformations or conversions, nor is there responsibility assumed to maintain the data in any manner or form. 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.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: JALBTCX
Contact_Position: Data Production Manager
Contact_Address:
Address_Type: mailing and physical
Address: 7225 Stennis Airport Rd., STE 100
City: Kiln
State_or_Province: MS
Postal_Code: 39556
Country: US
Contact_Voice_Telephone: 228-252-1121
Contact_Voice_Telephone: 228-252-1131
Contact_Facsimile_Telephone: 228-252-1133
Contact_Electronic_Mail_Address: JALBTCX@usace.army.mil
Hours_of_Service: 8 am - 5 pm Monday through Friday
Browse_Graphic:
Browse_Graphic_File_Name:
https://coast.noaa.gov/htdata/lidar2_z/geoid12b/data/5186/supplemental/gulf2016_usace_ncmp_gulf_m5186.kmz
Browse_Graphic_File_Description:
This graphic shows the lidar coverage for the 2016 topobathy lidar acquisition along the Texas coast.
Browse_Graphic_File_Type: kmz
Data_Set_Credit:
Acknowledgement of the Joint Airborne Lidar Bathymetry Technical Center of eXpertise (JALBTCX) would be appreciated in any publications or derived products.
Native_Data_Set_Environment:
Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.1.0.3035
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: These data are not attributed.
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: N/A
Attribute_Accuracy_Explanation: These data are not attributed.
Logical_Consistency_Report:
During inspection and QC of the lidar point cloud, flightline to flightline elevation differences met the CZMIL sensor specifications.
Completeness_Report:
This data set covers the spatial extent of topographic lidar data obtained during this survey.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
CZMIL topographic data - Compiled to meet 1 m horizontal accuracy at 95% confidence level. CZMIL bathymetric data - Compiled to meet 3.5 + 0.05d m horizontal accuracy at 95% confidence level, d is depth.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
CZMIL topographic data - Compiled to meet 19.6 cm vertical accuracy at 95% confidence level. CZMIL bathymetric shallow FOV data - Compiled to meet SQRT((0.20^2) +((0.0075d)^2)) m vertical accuracy at 95% confidence level, d is depth. CZMIL bathymetric deep FOV data - Compiled to meet SQRT((0.30^2) +((0.013d)^2)) m vertical accuracy at 95% confidence level, d is depth.
Lineage:
Process_Step:
Process_Description:
These data were collected using the CZMIL system. It is owned and operated by the U.S. Army Corps of Engineers (USACE). The system collects topo/bathy lidar data at 10 kHz and RGB imagery at 2 Hz. A CASI-1500 hyperspectral line scanner is integrated with the system as well. Aircraft position, velocity and acceleration information are collected through a combination of Novatel and POS A/V 510 equipment. All raw data streams are transferred to the office for downloading and processing in CZMIL's Hydro Fusion software. Aircraft position data are processed using POSPac software and the results are combined with the lidar data to produce 3-D positions for each lidar shot. Upon inspection and QA/QC in the software packages Fledermaus and PFM_ABE, anomalous data are flagged as invalid. PFM_ABE software then converts all valid data from ellipsoid to orthometric heights based on the NGS' GEOID12B model and exports valid lidar data as a series of unclassified LAS files.
Process_Date: 20160909
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: JALBTCX
Contact_Position: Data Production Manager
Contact_Address:
Address_Type: mailing and physical
Address: 7225 Stennis Airport RD., STE 100
City: Kiln
State_or_Province: MS
Postal_Code: 39556
Country: US
Contact_Voice_Telephone: 228-252-1121
Contact_Voice_Telephone: 228-252-1131
Contact_Facsimile_Telephone: 228-252-1133
Contact_Electronic_Mail_Address: JALBTCX@usace.army.mil
Hours_of_Service: 8 am - 5 pm Monday through Friday
Process_Step:
Process_Description:
LAS files are imported into GeoCue V2014.1.21.1, which is a geospatial workflow production and management software tool employed by JALBTCX to perform and monitor production of data products. Upon import into GeoCue, A customized classification macro, built upon the TerraScan V16 module within MicroStation V8i, classifies valid topobathy data as ground points (2), unclassified points (1), and bathymetric points (29). Upon completion the macro, the classification results undergo quality control and any misclassified points are manually edited. In areas of dense vegetation the bare earth ground points might be incorrectly classified due to the inability of the laser to penetrate the canopy and reach the bare ground. In these areas, JALBTCX defaults to the algorithm's "ground" surface instead of manually reclassifying those points. They are partitioned into a series of 5km or quarter quad delivery boxes, one Classified LAS file per box. The format of the file is LAS version 1.2. Data are classified as 1 (valid non-ground topographic data), 2 (valid ground topographic data), and 29 (valid bathymetric data).
Process_Date: 20170517
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: JALBTCX
Contact_Position: Data Production Manager
Contact_Address:
Address_Type: mailing and physical
Address: 7225 Stennis Airport Rd., STE 100
City: Kiln
State_or_Province: MS
Postal_Code: 39556
Country: US
Contact_Voice_Telephone: 228-252-1121
Contact_Voice_Telephone: 228-252-1131
Contact_Facsimile_Telephone: 228-252-1133
Contact_Electronic_Mail_Address: JALBTCX@usace.army.mil
Hours_of_Service: 8am - 5pm Monday through Friday
Process_Step:
Process_Description:
Data classified as ground points (2) and bathymetric points (29) in the las files are converted to a grid by generating a triangulated irregular network (TIN) and then extracting the grid node elevations from the TIN surface. The origin point of the grid is located at a horizontal position whose value is evenly divisible by the 1m grid resolution such that rasters from subsequent surveys have common cell boundaries. JALBTCX uses Quick Terrain Modeler V8 to perform this operation utilizing the following parameters; "Legacy Triangulation", "Max Sample Excursion - 30000", "Max Triangle Side - 30000", "Radius - none", "Tolerance - 1", and "Tiling Settings Snap to Grid (Expand)." The grid is exported from Quick Terrain Modeler as an ESRI ASCII Z grid file. Utilizing an in-house python script within ESRI ArcMap V10.2, the ASCII Z grid file is converted to a tiff-format raster file whose projection is defined as "The North American Datum of 1983 (2011)." The raster is then multiplied against a corresponding 1m Grid mask raster, a mask image produced from JALBTCX's 1m Grid, in ESRI's Raster Calculator to remove interpolated areas where data does not exist.
Process_Date: 20170522
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: JALBTCX
Contact_Position: Data Production Manager
Contact_Address:
Address_Type: mailing and physical
Address: 7225 Stennis Airport Rd., STE 100
City: Kiln
State_or_Province: MS
Postal_Code: 39556
Country: US
Contact_Voice_Telephone: 228-252-1131
Contact_Voice_Telephone: 228-252-1121
Contact_Facsimile_Telephone: 228-252-1133
Contact_Electronic_Mail_Address: JALBTCX@usace.army.mil
Hours_of_Service: 8am - 5pm Monday through Friday
Process_Step:
Process_Description:
The NOAA Office for Coastal Management (OCM) received the data in tif format from JALBTCX. The bare earth raster files were at a 1 m grid spacing. The data were in geographic coordinates and NAVD88 elevations in meters. OCM copied the raster files to database and https for Digital Coast storage and provisioning purposes.
Process_Date: 20170901
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:
Geographic:
Latitude_Resolution: 8.9831528411952133e-009
Longitude_Resolution: 8.9831528411952133e-009
Geographic_Coordinate_Units: Decimal degrees
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
Altitude_Resolution: 0.001
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
Contact_Voice_Telephone: 843-740-1202
Contact_Electronic_Mail_Address: coastal.info@noaa.gov
Resource_Description: Downloadable Data
Distribution_Liability:
These data have been developed from the best available sources. Although efforts have been made to ensure that the data are accurate and reliable, errors and variable conditions originating from physical sources used to develop the data may be reflected in the data supplied. Users must be aware of these conditions and bear responsibility for the appropriate use of the information with respect to possible errors, scale, resolution, rectification, positional accuracy, development methodology, time period, environmental and climatic conditions and other circumstances specific to these data. The user is responsible for understanding the accuracy limitations of the data provided herein. The burden for determining fitness for use lies entirely with the user. The user should refer to the accompanying metadata notes for a description of the data and data development procedures. Any conclusions drawn from the analysis of this information are not the responsibility of JALBTCX, the NOAA Office for Coastal Management, 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=6371
Metadata_Reference_Information:
Metadata_Date: 20170901
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
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
Generated by mp version 2.9.32 on Fri Sep 1 10:19:22 2017