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Summary

Browse graphic

Short Citation
OCM Partners, 2024: 2015 DVRPC Lidar: Delaware Valley (PA, NJ), https://www.fisheries.noaa.gov/inport/item/60138.
Full Citation Examples

Abstract

Geographic Extent: This data set covers approximately 3260 square miles over the Philadelphia Metro area, comprised of of 8 contiguous counties located in the states of Pennsylvania and New Jersey. A small section in Pennsylvania (parts of Delaware, Montgomery, and Philadelphia counties) was re-collected in November 2015 and is available as a separate data set. This smaller data set is identified as Delaware Valley - 5A. A link to this smaller data set is provided in the URL section of this metadata record.

Dataset Description: Delaware Valley 2015 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 1.2. The data was developed based on a horizontal projection/datum of UTM Zone 18, NAD83 (2011), meters and vertical datum of NAVD1988 (GEOID12A), meters. LiDAR data was delivered in RAW flight line swath format, processed to create Classified LAS 1.4 Files formatted to 25 individual 1500 meter X 1500 meter tiles for the pilot (3752 individual 1500 meter X 1500 meter tiles for the entire project area), Bare Earth DEMs tiled to the same 1500 meter X 1500 meter tile schema, and Breaklines in Esri shapefile format.

Ground Conditions: LiDAR was collected in spring of 2015, 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 155 Land Cover control points that were used to calibrate the LIDAR to known ground locations established throughout the Delaware Valley project area (75 calibration control points).

The NOAA Office for Coastal Management (OCM) downloaded this data set from this USGS site:

ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/Elevation/LPC/Projects/USGS_LPC_DE_DelawareValley_HD_2015_LAS_2017

These files were processed to the Data Access Viewer (DAV) and https. The total number of laz files downloaded and processed was 3589.

The breaklines were also downloaded and are available for download at the link provided in the URL section of this metadata record. Please note that this product has 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.

Distribution Information

  • 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, geographic coordinates, orthometric heights. Note that the vertical datum (hence elevations) of the files here are different than described in this document. They will be in an orthometric datum.

Access Constraints:

None

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.

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

Geographic Area 1

-75.711433° W, -74.37534° E, 40.610129° N, 39.502119° S

Time Frame 1
2015-04-12 - 2015-05-23

Item Identification

Title: 2015 DVRPC Lidar: Delaware Valley (PA, NJ)
Status: Completed
Creation Date: 2015
Publication Date: 2015
Abstract:

Geographic Extent: This data set covers approximately 3260 square miles over the Philadelphia Metro area, comprised of of 8 contiguous counties located in the states of Pennsylvania and New Jersey. A small section in Pennsylvania (parts of Delaware, Montgomery, and Philadelphia counties) was re-collected in November 2015 and is available as a separate data set. This smaller data set is identified as Delaware Valley - 5A. A link to this smaller data set is provided in the URL section of this metadata record.

Dataset Description: Delaware Valley 2015 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 1.2. The data was developed based on a horizontal projection/datum of UTM Zone 18, NAD83 (2011), meters and vertical datum of NAVD1988 (GEOID12A), meters. LiDAR data was delivered in RAW flight line swath format, processed to create Classified LAS 1.4 Files formatted to 25 individual 1500 meter X 1500 meter tiles for the pilot (3752 individual 1500 meter X 1500 meter tiles for the entire project area), Bare Earth DEMs tiled to the same 1500 meter X 1500 meter tile schema, and Breaklines in Esri shapefile format.

Ground Conditions: LiDAR was collected in spring of 2015, 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 155 Land Cover control points that were used to calibrate the LIDAR to known ground locations established throughout the Delaware Valley project area (75 calibration control points).

The NOAA Office for Coastal Management (OCM) downloaded this data set from this USGS site:

ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/Elevation/LPC/Projects/USGS_LPC_DE_DelawareValley_HD_2015_LAS_2017

These files were processed to the Data Access Viewer (DAV) and https. The total number of laz files downloaded and processed was 3589.

The breaklines were also downloaded and are available for download at the link provided in the URL section of this metadata record. Please note that this product has 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:

Classified LAS files are used to show the manually reviewed bare earth surface. This allows the user to create Breaklines and Raster. 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, 3D breaklines, and hydro-flattened DEMs as necessary.

Supplemental Information:

USGS Contract: G10PC00026 Task Order Number: G15PD00316

CONTRACTOR: Quantum Spatial

Lidar data were acquired and calibrated by Quantum Spatial.

All follow-on processing was completed by the prime contractor.

The following are the USGS lidar fields in JSON:

{

"ldrinfo" : {

"ldrspec" : "USGS-NGP Base Lidar Specification v1.2",

"ldrsens" : "ALS80-HP-8239",

"ldrmaxnr" : "4",

"ldrnps" : "0.34",

"ldrdens" : "8.05",

"ldranps" : "0.34",

"ldradens" : "8.05",

"ldrfltht" : "1541",

"ldrfltsp" : "150",

"ldrscana" : "18.0",

"ldrscanr" : "40.5",

"ldrpulsr" : "695.80",

"ldrpulsd" : "4",

"ldrpulsw" : "0.40",

"ldrwavel" : "1064",

"ldrmpia" : "1",

"ldrbmdiv" : "0.22",

"ldrswatw" : "1023.50",

"ldrswato" : "19.68",

"ldrgeoid" : "National Geodetic Survey (NGS) Geoid12A"

},

"ldrinfo31E" : {

"ldrspec" : "USGS-NGP Base Specification v1.2",

"ldrsens" : "ALS80-HP-8239",

"ldrmaxnr" : "4",

"ldrnps" : "0.34",

"ldrdens" : "8.00",

"ldranps" : "0.34",

"ldradens" : "8.00",

"ldrfltht" : "1580",

"ldrfltsp" : "150",

"ldrscana" : "18.0",

"ldrscanr" : "40.5",

"ldrpulsr" : "693.60",

"ldrpulsd" : "4",

"ldrpulsw" : "0.40",

"ldrwavel" : "1064",

"ldrmpia" : "1",

"ldrbmdiv" : "0.22",

"ldrswatw" : "1026.75",

"ldrswato" : "19.43",

"ldrgeoid" : "National Geodetic Survey (NGS) Geoid12A"

},

"ldrinfoCKZ" : {

"ldrspec" : "USGS-NGP Base Specification v1.2",

"ldrsens" : "ALS80-HP-8239",

"ldrmaxnr" : "4",

"ldrnps" : "0.34",

"ldrdens" : "7.65",

"ldranps" : "0.34",

"ldradens" : "7.65",

"ldrfltht" : "1599",

"ldrfltsp" : "150",

"ldrscana" : "14.5",

"ldrscanr" : "26.0",

"ldrpulsr" : "532.40",

"ldrpulsd" : "4",

"ldrpulsw" : "0.40",

"ldrwavel" : "1064",

"ldrmpia" : "1",

"ldrbmdiv" : "0.22",

"ldrswatw" : "814.65",

"ldrswato" : "24.91",

"ldrgeoid" : "National Geodetic Survey (NGS) Geoid12A"

},

"ldrinfoLOM" : {

"ldrspec" : "USGS-NGP Base Specification v1.2",

"ldrsens" : "ALS80-HP-8239",

"ldrmaxnr" : "4",

"ldrnps" : "0.34",

"ldrdens" : "7.85",

"ldranps" : "0.34",

"ldradens" : "7.85",

"ldrfltht" : "1774",

"ldrfltsp" : "150",

"ldrscana" : "14.5",

"ldrscanr" : "51.0",

"ldrpulsr" : "623.20",

"ldrpulsd" : "4",

"ldrpulsw" : "0.46",

"ldrwavel" : "1064",

"ldrmpia" : "1",

"ldrbmdiv" : "0.22",

"ldrswatw" : "931.02",

"ldrswato" : "23.10",

"ldrgeoid" : "National Geodetic Survey (NGS) Geoid12A"

},

"ldrinfoOQN" : {

"ldrspec" : "USGS-NGP Base Specification v1.2",

"ldrsens" : "ALS80-HP-8239",

"ldrmaxnr" : "4",

"ldrnps" : "0.34",

"ldrdens" : "7.70",

"ldranps" : "0.34",

"ldradens" : "7.70",

"ldrfltht" : "1765",

"ldrfltsp" : "150",

"ldrscana" : "14.8",

"ldrscanr" : "51.0",

"ldrpulsr" : "622.40",

"ldrpulsd" : "4",

"ldrpulsw" : "0.46",

"ldrwavel" : "1064",

"ldrmpia" : "1",

"ldrbmdiv" : "0.22",

"ldrswatw" : "947.80",

"ldrswato" : "22.76",

"ldrgeoid" : "National Geodetic Survey (NGS) Geoid12A"

},

"ldrinfo_downtown" : {

"ldrspec" : "USGS-NGP Base Specification v1.2",

"ldrsens" : "ALS80-HP-8239",

"ldrmaxnr" : "4",

"ldrnps" : "0.34",

"ldrdens" : "7.79",

"ldranps" : "0.34",

"ldradens" : "7.79",

"ldrfltht" : "1555",

"ldrfltsp" : "150",

"ldrscana" : "14.0",

"ldrscanr" : "57.0",

"ldrpulsr" : "528.80",

"ldrpulsd" : "4",

"ldrpulsw" : "0.40",

"ldrwavel" : "1064",

"ldrmpia" : "1",

"ldrbmdiv" : "0.22",

"ldrswatw" : "792.86",

"ldrswato" : "24.57",

"ldrgeoid" : "National Geodetic Survey (NGS) Geoid12A"

},

"ldrinfoVAY" : {

"ldrspec" : "USGS-NGP Base Specification v1.2",

"ldrsens" : "ALS80-HP-8239",

"ldrmaxnr" : "4",

"ldrnps" : "0.34",

"ldrdens" : "8.00",

"ldranps" : "0.34",

"ldradens" : "8.00",

"ldrfltht" : "1546",

"ldrfltsp" : "150",

"ldrscana" : "18.0",

"ldrscanr" : "40.5",

"ldrpulsr" : "693.60",

"ldrpulsd" : "4",

"ldrpulsw" : "0.40",

"ldrwavel" : "1064",

"ldrmpia" : "1",

"ldrbmdiv" : "0.22",

"ldrswatw" : "1026.75",

"ldrswato" : "19.69",

"ldrgeoid" : "National Geodetic Survey (NGS) Geoid12A"

},

"ldrinfoN87" : {

"ldrspec" : "USGS-NGP Base Specification v1.2",

"ldrsens" : "ALS80-HP-8239",

"ldrmaxnr" : "4",

"ldrnps" : "0.34",

"ldrdens" : "7.95",

"ldranps" : "0.34",

"ldradens" : "7.95",

"ldrfltht" : "1356",

"ldrfltsp" : "150",

"ldrscana" : "17.5",

"ldrscanr" : "47.5",

"ldrpulsr" : "591.00",

"ldrpulsd" : "4",

"ldrpulsw" : "0.35",

"ldrwavel" : "1064",

"ldrmpia" : "1",

"ldrbmdiv" : "0.22",

"ldrswatw" : "876.53",

"ldrswato" : "21.65",

"ldrgeoid" : "National Geodetic Survey (NGS) Geoid12A"

},

"ldraccur" : {

"ldrchacc" : "0.196",

"rawnva" : "0.082",

"rawnvan" : "87",

"clsnva" : "0.080",

"clsnvan" : "87",

"clsvva" : "0.265",

"clsvvan" : "68"

},

"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" : "11-bit",

"lasclass" : {

"clascode" : "1",

"clasitem" : "Processed but unclassified"

},

"lasclass" : {

"clascode" : "2",

"clasitem" : "Bare earth ground"

},

"lasclass" : {

"clascode" : "7",

"clasitem" : "Low noise"

},

"lasclass" : {

"clascode" : "8",

"clasitem" : "Model Key Point"

},

"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

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

Spatial Keywords

Thesaurus Keyword
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 > NEW JERSEY
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > PENNSYLVANIA
Global Change Master Directory (GCMD) Location Keywords
VERTICAL LOCATION > LAND SURFACE
UNCONTROLLED
None Continent > North America > United States Of America > New Jersey > Burlington County
None Continent > North America > United States Of America > New Jersey > Camden County
None Continent > North America > United States Of America > New Jersey > Gloucester County
None Continent > North America > United States Of America > New Jersey > Mercer County
None Continent > North America > United States Of America > Pennsylvania > Bucks County
None Continent > North America > United States Of America > Pennsylvania > Delaware County
None Continent > North America > United States Of America > Pennsylvania > Philadelphia County
None Continent > North America > United States Of America > Pennsylvania> Montgomery County

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
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: Model (digital)
Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility of DVRPC, USGS, NOAA, the Office for Coastal Management or its partners.

Data Set Credit: Quantum Spatial, Delaware Valley Regional Planning Commission

Support Roles

Data Steward

CC ID: 913361
Date Effective From: 2020
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: 913360
Date Effective From: 2020
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: 913362
Date Effective From: 2020
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: 913363
Date Effective From: 2020
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: 1144775
W° Bound: -75.711433
E° Bound: -74.37534
N° Bound: 40.610129
S° Bound: 39.502119

Extent Group 1 / Time Frame 1

CC ID: 1144774
Time Frame Type: Range
Start: 2015-04-12
End: 2015-05-23

Spatial Information

Spatial Representation

Representations Used

Grid: No
Vector: Yes
Text / Table: No
TIN: No
Stereo Model: No
Video: No

Vector Representation 1

CC ID: 913374
Point Object Present?: Yes
Point Object Count: 1967309968

Reference Systems

Reference System 1

CC ID: 1144772

Coordinate Reference System

CRS Type: Geographic 3D
EPSG Code: EPSG:6319
EPSG Name: NAD83(2011)
See Full Coordinate Reference System Information

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: 913364
Start Date: 2020-06-25
End Date: Present
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9119/details/9119
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2020 - 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.

File Type (Deprecated): Zip
Compression: Zip

Distribution 2

CC ID: 913365
Start Date: 2020-06-25
End Date: Present
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9119/index.html
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2020 - Present)
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. They will be in an orthometric datum.

File Type (Deprecated): LAZ
Distribution Format: LAS/LAZ - LASer
Compression: Zip

URLs

URL 1

CC ID: 913366
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9119/breaklines/
Name: Breaklines
URL Type:
Online Resource
Description:

Link to data set breaklines.

URL 2

CC ID: 913367
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: 913368
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9119/supplemental/pa2015_del_vall_m9119.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: 913369
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9119/supplemental/26236_DVRPC_ProjectReport.pdf
Name: Dataset report
URL Type:
Online Resource
File Resource Format: PDF
Description:

Link to data set report.

URL 5

CC ID: 913390
URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9122/details/9122
Name: Delaware Valley - 5A
URL Type:
Online Resource
Description:

Link to the Data Access Viewer (DAV) data download for the smaller PA region of this data set.

Technical Environment

Description:

MicroStation Version 8; TerraScan Version 15; TerraModeler Version 15; GeoCue Version 2014.1.21.1; ESRI ArcGIS 10.2; Global Mapper 16; Leica Cloud Pro 1.2; Windows 7 Operating System

\\psihq_nx3200\Projects\26236_DVRPC_LiDAR\ 24.1 GB and

\\Matrix\LIDAR\26236_DVRPC\ 5.09 TB

Data Quality

Vertical Positional Accuracy:

The specifications require that only Nonvegetated Vertical Accuracy (NVA) be computed for raw lidar point cloud swath files. The vertical accuracy was tested with 155 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 check points were distributed throughout the project. Specifications for this project require that the NVA be 19.6 cm or better AccuracyZ at 95 percent confidence level. 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 0.041 meters. AccuracyZ has been tested to meet 19.6 cm NVA at 95 percent confidence level using (RMSEz * 1.9600) as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines.

Completeness Report:

These raw 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 Nonvegetated Vertical Accuracy specifications.

Conceptual Consistency:

Data cover the entire area specified for this project.

Data Management

Have Resources for Management of these Data Been Identified?: Yes
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-CO
How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive?:

Data is backed up to tape and to cloud storage.

Lineage

Sources

Control Survey Report: Delaware Valley Ortho and Lidar Task Order

CC ID: 1144768
Contact Role Type: Originator
Contact Type: Organization
Contact Name: Quantum Spatial
Publish Date: 2015-01-01
Extent Type: Discrete
Extent Start Date/Time: 2015
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.

Lidar RAW Data for Delaware Valley 2015

CC ID: 1144769
Contact Role Type: Originator
Contact Type: Organization
Contact Name: Quantum Spatial
Publish Date: 2015-01-01
Extent Type: Range
Extent Start Date/Time: 2015-04-12
Extent End Date/Time: 2015-05-23
Source Contribution:

This data source was used to populate the lidar point cloud data.

Process Steps

Process Step 1

CC ID: 1144770
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 1 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 bridge decks were classified to Class 17.

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 identified using the Overlap Flag, per LAS 1.4 specifications.

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 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: 2015-01-01 00:00:00

Process Step 2

CC ID: 1144771
Description:

The NOAA Office for Coastal Management (OCM) downloaded this data set from this USGS site:

ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/Elevation/LPC/Projects/USGS_LPC_DE_DelawareValley_HD_2015_LAS_2017

The total number of laz files downloaded and processed was 3589.

The data were in UTM Zone 18 (NAD83 2011), meters coordinates and NAVD88 (Geoid12A) elevations in meters. From the provided report, the data were classified as:

1 - Unclassified

2 - Ground

7 - Low Noise

9 - Water

10 - Ignored Ground

17 - Bridge Decks

18 - High Noise

OCM processed all classifications of points to the Digital Coast Data Access Viewer (DAV). Classes available in 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. An internal OCM script was run to check the number of points by classification and by flight ID and the gps and intensity ranges.

2. Internal OCM scripts were run on the laz files to convert from orthometric (NAVD88) elevations to ellipsoid elevations using the Geoid12A model, to convert from UTM Zone 18 (NAD83 2011), meters coordinates to geographic coordinates, to assign the geokeys, to sort the data by gps time and zip the data to database and to http.

Process Date/Time: 2020-06-25 00:00:00
Process Contact: Office for Coastal Management (OCM)

Related Items

Item Type Relationship Type Title
Data Set (DS) Cross Reference 2015 DVRPC Lidar: Delaware Valley - 5A, PA

Catalog Details

Catalog Item ID: 60138
GUID: gov.noaa.nmfs.inport:60138
Metadata Record Created By: Rebecca Mataosky
Metadata Record Created: 2020-06-26 10:28+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2023-10-17 16:12+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