2014 NRCS Lidar: Shenandoah, VA
Data Set (DS) | OCM Partners (OCMP)GUID: gov.noaa.nmfs.inport:72629 | Updated: July 31, 2024 | Published / External
Summary
Short Citation
OCM Partners, 2025: 2014 NRCS Lidar: Shenandoah, VA, https://www.fisheries.noaa.gov/inport/item/72629.
Full Citation Examples
Geographic Extent: Shenandoah Area of Interest in Virginia, covering approximately 1512 square miles.
Dataset Description of Original Data: The Shenandoah, VA LiDAR 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 Virginia State Plane North Zone coordinate System (FIPS 4501), NAD83, feet and vertical datum of NAVD1988 (GEOID12A), feet. LiDAR data was delivered in RAW flight line swath format, processed to create Classified LAS 1.2 Files formatted to 26hyudr20 individual 5000ft x 5000ft tiles, and corresponding 2.5 foot gridded Hydro Flattened Raster DEM Files tiled to the same 5000ft x 5000ft schema, 1 ESRI GeoDatabase containing 2 foot Contours, tiled Intensity Images, and Hydro-Flattening Breaklines in ESRI Shapefile format.
Ground Conditions: LiDAR was collected in 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, Photo Science established a total of 40 ground control points and 100 QC points that were used to calibrate the LIDAR to known ground locations established throughout the Shenandoah, Virginia project area.
This metadata record supports the data entry in the NOAA Digital Coast Data Access Viewer (DAV). For this data set, the DAV is leveraging the Entwine Point Tiles (EPT) hosted by USGS on Amazon Web Services.
Distribution Information
-
Not Applicable
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. Change to an orthometric vertical datum is one of the many options.
-
LAS/LAZ - LASer
Bulk download of data files in LAZ format, VA State Plane North NAD83, US feet coordinates and in NAVD88 (GEOID12A) elevations in US feet.
None
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.
Controlled Theme Keywords
elevation, TERRAIN ELEVATION
Child Items
No Child Items for this record.
Contact Information
Point of Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov
Metadata Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov
Extents
-79.03503701985° W,
-77.5856345857° E,
39.19974505784° N,
38.16983059442° S
2014-01-18 - 2014-05-23
Item Identification
Title: | 2014 NRCS Lidar: Shenandoah, VA |
---|---|
Short Name: | va2014_shenandoah_m10118_metadata |
Status: | Completed |
Creation Date: | 2014 |
Publication Date: | 2014 |
Abstract: |
Geographic Extent: Shenandoah Area of Interest in Virginia, covering approximately 1512 square miles. Dataset Description of Original Data: The Shenandoah, VA LiDAR 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 Virginia State Plane North Zone coordinate System (FIPS 4501), NAD83, feet and vertical datum of NAVD1988 (GEOID12A), feet. LiDAR data was delivered in RAW flight line swath format, processed to create Classified LAS 1.2 Files formatted to 26hyudr20 individual 5000ft x 5000ft tiles, and corresponding 2.5 foot gridded Hydro Flattened Raster DEM Files tiled to the same 5000ft x 5000ft schema, 1 ESRI GeoDatabase containing 2 foot Contours, tiled Intensity Images, and Hydro-Flattening Breaklines in ESRI Shapefile format. Ground Conditions: LiDAR was collected in 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, Photo Science established a total of 40 ground control points and 100 QC points that were used to calibrate the LIDAR to known ground locations established throughout the Shenandoah, Virginia project area. This metadata record supports the data entry in the NOAA Digital Coast Data Access Viewer (DAV). For this data set, the DAV is leveraging the Entwine Point Tiles (EPT) hosted by USGS on Amazon Web Services. |
Purpose: |
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 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 as necessary. |
Supplemental Information: |
USGS Contract No. G10PC00026 CONTRACTOR: Photo Science, A Quantum Spatial Company Ground Control Points were acquired and calibrated by Photo Science, A Quantum Spatial Company All Lidar data acquisition, calibration, and follow-on processing were completed by the prime contractor.
The following are the USGS lidar fields in JSON: {
"ldrinfo" : {
"ldrspec" : "USGS-NGP Base Lidar Specification v1.0", "ldrsens" : "Leica ALS 70 and Optech Gemini", "ldrmaxnr" : "4", "ldrnps" : "0.66", "ldrdens" : "1.51", "ldrfltht" : "2134", "ldrfltsp" : "140", "ldrscana" : "20.0", "ldrscanr" : "31.3", "ldrpulsr" : "256.8", "ldrpulsd" : "4", "ldrpulsw" : "0.48", "ldrwavel" : "1064", "ldrmpia" : "1", "ldrbmdiv" : "0.22", "ldrswatw" : "1553.42", "ldrswato" : "9.72%", "ldrcrs" : "NAD_1983_2011_StatePlane_Virginia_North_FIPS_4501_Feet", "ldrgeoid" : "National Geodetic Survey (NGS) Geoid12A" }, "ldraccur" : {
"ldrchacc" : "2.0", "rawfva" : "0.301", "clsfva" : "0.279", "clscva" : "0.611", "clssvas" : {
"svalctyp" : "Bare Earth and Low Grass", "svavalue" : "0.186" }, "clssvas" : {
"svalctyp" : "Forested, Fully Covered by Trees", "svavalue" : "0.491" }, "clssvas" : {
"svalctyp" : "High Grass, Weeds, and Crops", "svavalue" : "0.894" }, "clssvas" : {
"svalctyp" : "Urban Areas", "svavalue" : "0.185" } }, "lasinfo" : {
"lasver" : "1.2", "lasprf" : "1", "laswheld" : "Withheld (ignore) points were identified in these files using the standard LAS Withheld bit.", "lasolap" : "Swath "overage" points were identified in these files by adding 16 to the standard classification values.", "lasintr" : "8", "lasclass" : {
"clascode" : "1", "clasitem" : "Processed, but Unclassified" }, "lasclass" : {
"clascode" : "2", "clasitem" : "Bare earth ground" }, "lasclass" : {
"clascode" : "6", "clasitem" : "Building" }, "lasclass" : {
"clascode" : "7", "clasitem" : "Noise" }, "lasclass" : {
"clascode" : "9", "clasitem" : "In-land Water" }, "lasclass" : {
"clascode" : "10", "clasitem" : "Ignored Ground" }, "lasclass" : {
"clascode" : "17", "clasitem" : "Overlap Default (Unclassified)" }, "lasclass" : {
"clascode" : "18", "clasitem" : "Overlap Bare-earth ground" }, "lasclass" : {
"clascode" : "25", "clasitem" : "Overlap In-land Water" } }} |
Keywords
Theme Keywords
Thesaurus | Keyword |
---|---|
Global Change Master Directory (GCMD) Science Keywords |
EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
|
ISO 19115 Topic Category |
elevation
|
Spatial Keywords
Thesaurus | Keyword |
---|---|
Global Change Master Directory (GCMD) Location Keywords |
CONTINENT
|
Global Change Master Directory (GCMD) Location Keywords |
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA
|
Global Change Master Directory (GCMD) Location Keywords |
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > VIRGINIA
|
Global Change Master Directory (GCMD) Location Keywords |
VERTICAL LOCATION > LAND SURFACE
|
Instrument Keywords
Thesaurus | Keyword |
---|---|
Global Change Master Directory (GCMD) Instrument Keywords |
LIDAR > Light Detection and Ranging
|
Platform Keywords
Thesaurus | Keyword |
---|---|
Global Change Master Directory (GCMD) Platform Keywords |
Airplane > Airplane
|
Physical Location
Organization: | Office for Coastal Management |
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City: | Charleston |
State/Province: | SC |
Data Set Information
Data Set Scope Code: | Data Set |
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Data Set Type: | Elevation |
Maintenance Frequency: | None Planned |
Data Presentation Form: | Model (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: | Photo Science, A Quantum Spatial Company, flew the LiDAR and processed the data, NRCS, USGS |
Support Roles
Data Steward
Date Effective From: | 2024 |
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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
Date Effective From: | 2024 |
---|---|
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
Date Effective From: | 2014 |
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Date Effective To: | |
Contact (Organization): | U.S. Geological Survey |
Address: |
12201 Sunrise Valley Drive Reston, VA 20191 USA |
URL: | USGS Home |
Metadata Contact
Date Effective From: | 2024 |
---|---|
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
Date Effective From: | 2024 |
---|---|
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 |
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Extent Group 1
Extent Group 1 / Geographic Area 1
W° Bound: | -79.03503701985 | |
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E° Bound: | -77.5856345857 | |
N° Bound: | 39.19974505784 | |
S° Bound: | 38.16983059442 |
Extent Group 1 / Time Frame 1
Time Frame Type: | Range |
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Start: | 2014-01-18 |
End: | 2014-05-23 |
Spatial Information
Spatial Representation
Representations Used
Grid: | No |
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Vector: | Yes |
Text / Table: | No |
TIN: | No |
Stereo Model: | No |
Video: | No |
Vector Representation 1
Point Object Present?: | Yes |
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Point Object Count: | 27379341993 |
Reference Systems
Reference System 1
Coordinate Reference System |
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Reference System 2
Coordinate Reference System |
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Access Information
Security Class: | Unclassified |
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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
Start Date: | 2024-05-13 |
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End Date: | Present |
Download URL: | https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=10118/details/10118 |
Distributor: | NOAA Office for Coastal Management (NOAA/OCM) (2024 - Present) |
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. Change to an orthometric vertical datum is one of the many options. |
Distribution Format: | Not Applicable |
Compression: | Zip |
Distribution 2
Start Date: | 2014 |
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End Date: | Present |
Download URL: | https://rockyweb.usgs.gov/vdelivery/Datasets/Staged/Elevation/LPC/Projects/NRCS_Shenandoah_VA_LiDAR/VA_Shenandoah_2014/LAZ/ |
Distributor: | U.S. Geological Survey (2014 - Present) |
File Name: | Bulk Download |
Description: |
Bulk download of data files in LAZ format, VA State Plane North NAD83, US feet coordinates and in NAVD88 (GEOID12A) elevations in US feet. |
Distribution Format: | LAS/LAZ - LASer |
Compression: | LAZ |
URLs
URL 1
URL: | https://coast.noaa.gov/dataviewer/ |
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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 2
URL: | https://s3-us-west-2.amazonaws.com/usgs-lidar-public/USGS_LPC_VA_Shenandoah_2013_LAS_2015/ept.json |
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Name: | USGS Entwine Point Tile (EPT) |
URL Type: |
Online Resource
|
File Resource Format: | json |
Description: |
Entwine Point Tile (EPT) is a simple and flexible octree-based storage format for point cloud data. The data is organized in such a way that the data can be reasonably streamed over the internet, pulling only the points you need. EPT files can be queried to return a subset of the points that give you a representation of the area. As you zoom further in, you are requesting higher and higher densities. A dataset in EPT will contain a lot of files, however, the ept.json file describes all the rest. The EPT file can be used in Potree and QGIS to view the point cloud. |
URL 3
URL: | https://usgs.entwine.io/data/view.html?r=%22https://s3-us-west-2.amazonaws.com/usgs-lidar-public/USGS_LPC_VA_Shenandoah_2013_LAS_2015%22 |
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Name: | USGS 3D View |
URL Type: |
Online Resource
|
Description: |
Link to view the point cloud, using the Entwine Point Tile (EPT) format, in the 3D Potree viewer. |
URL 4
URL: | https://rockyweb.usgs.gov/vdelivery/Datasets/Staged/Elevation/metadata/NRCS_Shenandoah_VA_LiDAR/VA_Shenandoah_2014/reports/LiDAR_Acquisition_Processing_Report_Shenandoah_USGS_TOG13PD00377.pdf |
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Name: | Lidar Report |
URL Type: |
Online Resource
|
File Resource Format: | |
Description: |
Link to the lidar report. |
URL 5
URL: | https://rockyweb.usgs.gov/vdelivery/Datasets/Staged/Elevation/metadata/NRCS_Shenandoah_VA_LiDAR/VA_Shenandoah_2014/ |
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Name: | USGS Additional Info |
URL Type: |
Online Resource
|
Description: |
Link to the reports, breaklines, metadata, and spatial metadata. |
Technical Environment
Description: |
MicroStation Version 8; TerraScan Version 14; TerraModeler Version 14; GeoCue Version 2013.1.45.1; ESRI ArcGIS 10.1; Global Mapper Version 15.2; ALS Post Processor Version 2.75 Build #25; Windows 7 Operating System \\psihq_nx3200\\Projects\7505_079_ShenandoahVA\ 390 GB and \\Matrix\LIDAR\7505_079_USGS_Shenandoah\ 2.16 TB |
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Data Quality
Vertical Positional Accuracy: |
The specifications require that only Fundamental Vertical Accuracy (FVA) be computed for raw lidar point cloud swath files. The vertical accuracy was tested with 28 independent survey located in open terrain. These check points were not used in the calibration or post processing of the lidar point cloud data. The survey checkpoints were distributed throughout the project area. Specifications for this project require that the FVA be 24.5 cm or better AccuracyZ at 95 percent confidence level. The FVA was tested using 28 independent survey located in open terrain. The survey checkpoints were distributed throughout the project area. The 28 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 4.66 cm (0.153 feet). AccuracyZ has been tested to meet 24.5 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. |
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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. |
Data Management
Have Resources for Management of these Data Been Identified?: | Yes |
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Approximate Percentage of Budget for these Data Devoted to Data Management: | Unknown |
Do these Data Comply with the Data Access Directive?: | Yes |
Actual or Planned Long-Term Data Archive Location: | NCEI-NC |
How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive?: |
Data is backed up to cloud storage. |
Lineage
Lineage Statement: |
The NOAA Office for Coastal Management (OCM) ingested references to the USGS Entwine Point Tile (EPT) hosted on Amazon Web Services (AWS) into the Digital Coast Data Access Viewer (DAV). The DAV accesses the point cloud as it resides on AWS under the usgs-lidar-public-container. |
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Sources
USGS AWS Entwine Point Tile (EPT)
Contact Role Type: | Publisher |
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Contact Type: | Organization |
Contact Name: | USGS |
Citation URL: | https://s3-us-west-2.amazonaws.com/usgs-lidar-public/USGS_LPC_VA_Shenandoah_2013_LAS_2015/ept.json |
Citation URL Name: | Entwine Point Tile |
Process Steps
Process Step 1
Description: |
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 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 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. |
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Process Date/Time: | 2014-01-01 00:00:00 |
Process Step 2
Description: |
Original point clouds in LAS/LAZ format were restructured as Entwine Point Tiles and stored on Amazon Web Services. The data were re-projected horizontally to WGS84 web mercator (EPSG 3857) and the vertical units were converted to meters (NAVD88 GEOID12A). |
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Process Contact: | U.S. Geological Survey |
Process Step 3
Description: |
The NOAA Office for Coastal Management (OCM) created references to the Entwine Point Tile (EPT) that was ingested into the NOAA Digital Coast Data Access Viewer (DAV). No changes were made to the data. The DAV will access the point cloud as it resides on Amazon Web Services (AWS) under the usgs-lidar-public container. This is the AWS URL being accessed: https://s3-us-west-2.amazonaws.com/usgs-lidar-public/USGS_LPC_VA_Shenandoah_2013_LAS_2015/ept.json |
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Process Date/Time: | 2024-05-13 00:00:00 |
Process Contact: | Office for Coastal Management (OCM) |
Catalog Details
Catalog Item ID: | 72629 |
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GUID: | gov.noaa.nmfs.inport:72629 |
Metadata Record Created By: | Rebecca Mataosky |
Metadata Record Created: | 2024-05-13 15:22+0000 |
Metadata Record Last Modified By: | Rebecca Mataosky |
Metadata Record Last Modified: | 2024-07-31 17:40+0000 |
Metadata Record Published: | 2024-05-13 |
Owner Org: | OCMP |
Metadata Publication Status: | Published Externally |
Do Not Publish?: | N |
Metadata Last Review Date: | 2024-05-13 |
Metadata Review Frequency: | 1 Year |
Metadata Next Review Date: | 2025-05-13 |