gov.noaa.nmfs.inport:49840
eng
UTF8
dataset
OCM Partners
resourceProvider
NOAA Office for Coastal Management
(843) 740-1202
2234 South Hobson Ave
Charleston
SC
29405-2413
coastal.info@noaa.gov
https://coast.noaa.gov
WWW:LINK-1.0-http--link
NOAA Office for Coastal Management Website
NOAA Office for Coastal Management Home Page
information
pointOfContact
2024-02-29T00:00:00
ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data
ISO 19115-2:2009(E)
2014 U.S. Geological Survey CMGP LiDAR: Post Sandy (National Capital Region)
ncr2014_usgs_sandy_dc_md_va_m4990_metadata
2016-01-09
publication
NOAA/NMFS/EDM
49840
https://www.fisheries.noaa.gov/inport/item/49840
WWW:LINK-1.0-http--link
Full Metadata Record
View the complete metadata record on InPort for more information about this dataset.
information
https://coast.noaa.gov/dataviewer
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Citation URL
Online Resource
download
https://coast.noaa.gov
WWW:LINK-1.0-http--link
Citation URL
Online Resource
download
USGS Contract No. G10PC00025
CONTRACTOR: Quantum Spatial, Inc
Ground Control Points were acquired and calibrated by Compass Data, Inc.
All Lidar data acquisition, calibration, and follow-on processing were completed by the prime contractor.
Geographic Extent: SANDY_Restoration_VA_MD_DC_QL2 Area of Interest covers approximately 2,002 square miles. Lot #5 contains the full project area
Dataset Description: The SANDY_Restoration_VA_MD_DC_QL2 project called for the Planning, Acquisition, processing and derivative products of LIDAR data to be collected at a nominal pulse spacing (NPS) of 0.7 meter. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base LIDAR Specification, Version 1. The data was developed based on a horizontal projection/datum of UTM Zone 18 North, NAD83, meters and vertical datum of NAVD1988 (GEOID12A), meters. LiDAR data was delivered in RAW flight line swath format, processed to create Classified LAS 1.2 Files formatted to 2283 individual 1500m x 1500m tiles, and corresponding Intensity Images and Bare Earth DEMs tiled to the same 1500m x 1500m schema, and Breaklines in ESRI Shapefile format.
Ground Conditions: LiDAR was collected in Winter 2014, while no snow was on the ground and rivers were at or below normal levels. In order to post process the LiDAR data to meet task order specifications, Quantum Spatial established a total of 59 QA control points and 95 Land Cover control points that were used to calibrate the LIDAR to known ground locations established throughout the SANDY_Restoration_VA_MD_DC_QL2 project area.
NOAA OCM processed the data under the mission name National Capital Region rather than Lot #5.
Classified LAS files are used to show the manually reviewed bare earth surface. This allows the user to create Intensity Images, Breaklines and Raster DEM.
The purpose of these lidar data was to produce high accuracy 3D hydro-flattened Digital Elevation Model (DEM) with a 1 meter cell size.
These raw lidar point cloud data were used to create classified lidar LAS files, intensity images, 3D breaklines, hydro-flattened DEMs as necessary.
completed
NOAA Office for Coastal Management
(843) 740-1202
2234 South Hobson Ave
Charleston
SC
29405-2413
coastal.info@noaa.gov
https://coast.noaa.gov
WWW:LINK-1.0-http--link
NOAA Office for Coastal Management Website
NOAA Office for Coastal Management Home Page
information
pointOfContact
NOAA Office for Coastal Management
(843) 740-1202
2234 South Hobson Ave
Charleston
SC
29405-2413
coastal.info@noaa.gov
https://coast.noaa.gov
WWW:LINK-1.0-http--link
NOAA Office for Coastal Management Website
NOAA Office for Coastal Management Home Page
information
custodian
asNeeded
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/4990/supplemental/ncr2014_usgs_sandy_dc_md_va_m4990.kmz
This graphic shows the lidar coverage for the 2014 lidar acquisition for the National Capital Region.
kmz
Bare earth
theme
Lidar - partner (no harvest)
project
InPort
otherRestrictions
Cite As: OCM Partners, [Date of Access]: 2014 U.S. Geological Survey CMGP LiDAR: Post Sandy (National Capital Region) [Data Date Range], https://www.fisheries.noaa.gov/inport/item/49840.
NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
otherRestrictions
Access Constraints: None
otherRestrictions
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. These data depict the heights at the time of the survey and are only accurate for that time.
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.
otherRestrictions
Distribution Liability: Any conclusions drawn from the analysis of this information are not the responsibility of Quantum Spatial Inc, USGS, NOAA, the Office for Coastal Management or its partners.
unclassified
NOAA Data Management Plan (DMP)
NOAA/NMFS/EDM
49840
https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ocmp/dmp/pdf/49840.pdf
WWW:LINK-1.0-http--link
NOAA Data Management Plan (DMP)
NOAA Data Management Plan for this record on InPort.
information
crossReference
vector
eng; US
elevation
-77.53815
-76.31908
38.037102
39.132246
| Currentness: Ground Condition
2014-04-10
2014-12-20
A footprint of this data set may be viewed in Google Earth at:
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/4990/supplemental/ncr2014_usgs_sandy_dc_md_va_m4990.kmz
A report for this the project may be viewed here:
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/4990/supplemental/ncr2014_usgs_sandy_dc_md_va_m4990_lidarreport.pdf
A report showing the project summary may be viewed here:
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/4990/supplemental/ncr2014_usgs_sandy_dc_md_va_m4990_summaryreport.pdf
Contractor supplied analysis reports are available here:
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/4990/supplemental/ncr2014_usgs_sandy_dc_md_va_m4990_delivered_analytics.zip
false
eng
false
none
NOAA Office for Coastal Management
(843) 740-1202
2234 South Hobson Ave
Charleston
SC
29405-2413
coastal.info@noaa.gov
https://coast.noaa.gov
WWW:LINK-1.0-http--link
NOAA Office for Coastal Management Website
NOAA Office for Coastal Management Home Page
information
distributor
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=4990
WWW:LINK-1.0-http--link
Customized Download
Create custom data files by choosing data area, product type, map projection, file format, datum, etc.
download
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/4990/index.html
WWW:LINK-1.0-http--link
Bulk Download
Simple download of data files.
download
dataset
Vertical Positional Accuracy
The specifications require that only Fundamental Vertical Accuracy (FVA) be computed for raw lidar point cloud swath files.
The vertical accuracy value is the AccuracyZ at 95 percent Confidence Interval in meters. The FVA was tested using 20 of 95 independent survey located in open terrain. The survey checkpoints were distributed throughout the project area. The 20 of 95 independent check points were surveyed using GPS techniques. See survey report for additional survey methodologies. 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. AccuracyZ has been tested to meet 18.13 cm Fundamental Vertical Accuracy at 95 Percent 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. ; Quantitative Value: 0.115 meters, Test that produced the value: 0.115 meters AccuracyZ at 95 percent Confidence Interval
The FVA was tested using 20 of 95 independent survey located in open terrain in Lot #5. The survey checkpoints were distributed throughout the project area. The 20 of 95 independent check points were surveyed using GPS techniques. See survey report for additional survey methodologies. 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. The RMSE was computed to be 0.059. AccuracyZ has been tested to meet 18.13 cm Fundamental Vertical Accuracy at 95 Percent 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.
Forested, Fully Covered by Trees, 0.136 m, determined from the derived DEM and reported as a 95th percentile error; Brush Lands, determined from the derived DEM and reported as a 95th percentile error, 0.033 m; Urban Areas, determined from the derived DEM and reported as a 95th percentile error, 0.057 m.
Completeness Report
Datasets contain complete coverage of tiles.
No points have been removed or excluded.
A visual qualitative assessment was performed to ensure data completeness.
There are no void areas or missing data. The raw point cloud is of good quality and data passes Fundamental Vertical Accuracy specifications.
Conceptual Consistency
Classified LAS files were tested by Photo Science for both vertical and horizontal accuracy. All data is seamless from one tile to the next, no gaps or no data areas.
Classified LAS Processing: 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 flattening breaklines were then classified to water (ASPRS Class 9) using TerraScan macro functionality. A buffer of 0.7 meter 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 to Class 17 (Overlap Default) and Class 18 (Overlap Ground). 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. Photo Science 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.
2014-12-01T00:00:00
The NOAA Office for Coastal Management (OCM) received the topographic files in classified LAZ format from USGS via ftp. The data were received in UTM Zone 18N NAD83 coordinates (meters) and vertically referenced to NAVD88 using the Geoid12a model in meters. OCM performed the following processing for data storage and Digital Coast provisioning purposes:
1. LAS files were compressed to LAZ format with LASTools.
2. LAS points which were duplicate or extraneous points (below -10 m) were removed and class 11 points were found to be in error and accounted for <0.01% of total points.
3. The LAS files were transformed to geographic (decimal degrees), ellipsoidal coordinates (meters) referenced to the Geoid12a model.
2015-12-25T00:00:00
Source Contribution: This data source was used to populate the lidar point cloud data. | Source Geospatial Form: lidar data | Type of Source Media: online
Lidar RAW Data for SANDY_Restoration_VA_MD_DC_QL2
2014-12-01
publication
2014-12-13
2014-12-19
Source Contribution: This data source was used (along with the airborne GPS/IMU Data) to aid in the georeferencing of the lidar point cloud data.
| Source Geospatial Form: vector digital data and tabular data | Type of Source Media: CD-ROM
Survey Report of LiDAR Ground Control Points
2014-03-06
publication
2014-03-06
Source Contribution: This data source was used (along with the lidar intensity imagery) to QC and vertically adjust the lidar point cloud data. | Source Geospatial Form: vector digital data and tabular data | Type of Source Media: online
50
Survey Report of LiDAR Quality Control Points: SANDY_Restoration_VA_MD_DC_QL2
2014-03-06
publication
2014-03-06