2017 NYS Lidar: Southwest NY (Spring)

Title:	2017 NYS Lidar: Southwest NY (Spring)
Short Name:	ny2017_southwest_spring_m9061
Status:	Completed
Creation Date:	2017
Abstract:	Product: Calibrated LiDAR version 1.4 .las tiles, classified to bare earth for subsequent derivatives. Geographic Extent: Chautauqua and Cattaraugus County, New York, covering approximately 1,722 square miles. Dataset Description: Chautauqua and Cattaraugus County, New York 2017 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 NAD83(2011), Universal Transverse Mercator Zone 17 N, meters and vertical datum of NAVD88 (GEOID12B), meters. Lidar data was delivered as flightline-extent unclassified LAS swaths, as processed Classified LAS 1.4 files, formatted to 1982 individual 1500 m x 1500 m tiles, as tiled bare earth DEMs; all tiled to the same 1500 m x 1500 m schema. Ground Conditions: Lidar was collected in early 2017, 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 and meet ASPRS vertical accuracy guidelines, New York Office of Information Technology Services established a total of 32 ground control points that were used to calibrate the lidar to known ground locations established throughout the Chautauqua and Cattaraugus County, New York project area. An additional 128 independent accuracy checkpoints, 75 in Bare Earth and Urban landcovers (75 NVA points). 53 in Tall Grass and Brushland/Low Trees categories (53 VVA points) were used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data. The NOAA Office for Coastal Management (OCM) downloaded 1982 laz files from this USGS site: ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/Elevation/LPC/Projects/USGS_LPC_NY_Southwest_East_2017_LAS_2018/ and processed the data to the Data Access Viewer (DAV) and to https. Hydro breaklines are also available. These data are available for download at the link provided in the URL section of this metadata record. Please note that these 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 or OCM.
Purpose:	To acquire detailed surface elevation data for use in conservation planning, design, research, floodplain mapping, dam safety assessments and elevation modeling, etc. Classified LAS files are used to show the manually reviewed bare earth surface. This allows the user to create 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.
Supplemental Information:	USGS Contract No. G17AC00096 CONTRACTOR: New York Office of Information Technology Services. SUBCONTRACTOR: Axis Geospatial, LLC Lidar data were acquired and calibrated by Axis GeoSpatial, LLC. All follow-up 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" : "Riegl Q1560 LiDAR System (Axis GeoSpatial LLC)", "ldrmaxnr" : "7", "ldrnps" : ".76", "ldrdens" : "2.87", "ldranps" : ".71", "ldradens" : "2.0", "ldrfltht" : "2469", "ldrfltsp" : "145", "ldrscana" : "58.52", "ldrscanr" : "84.3", "ldrpulsr" : "766", "ldrpulsd" : "5", "ldrpulsw" : ".60", "ldrwavel" : "1064", "ldrmpia" : "1", "ldrbmdiv" : "0.25", "ldrswatw" : "2561", "ldrswato" : "20", "ldrcrs" : "NAD 1983(2011) UTM Zone 17N Meters", "ldrgeoid" : "National Geodetic Survey (NGS) Geoid12B" }, "ldraccur" : { "ldrchacc" : "0.3887", "rawnva" : "0.048", "rawnvan" : "75" }, "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" : "16", "lasclass" : { "clascode" : "1", "clasitem" : "Processed, but Unclassified" }, "lasclass" : { "clascode" : "2", "clasitem" : "Bare Earth Ground" }, "lasclass" : { "clascode" : "7", "clasitem" : "Low Noise" }, "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

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

Temporal Keywords

Temporal Keywords
Thesaurus	Keyword
UNCONTROLLED
None	2017
None	April
None	May

Spatial Keywords

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 YORK
Global Change Master Directory (GCMD) Location Keywords	VERTICAL LOCATION > LAND SURFACE
UNCONTROLLED
None	Continent > North America > United States Of America > New York >Cattaraugus County
None	Continent > North America > United States Of America > New York >Chautauqua County

Instrument Keywords

Instrument Keywords
Thesaurus	Keyword
Global Change Master Directory (GCMD) Instrument Keywords	LIDAR > Light Detection and Ranging

Platform Keywords

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 the New York Office of Information Technology Services, USGS, NOAA, the Office for Coastal Management or its partners.
Data Set Credit:	New York Office of Information Technology Services

Support Roles

Data Steward

CC ID: 900615

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: 900614

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: 900616

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: 900617

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: 1144325

W° Bound:	-79.768477
E° Bound:	-78.718362
N° Bound:	42.581543
S° Bound:	41.985952

Extent Group 1 / Time Frame 1

CC ID: 1144319

Time Frame Type:	Discrete
Start:	2017-04-17

Extent Group 1 / Time Frame 2

CC ID: 1144320

Time Frame Type:	Discrete
Start:	2017-04-18

Extent Group 1 / Time Frame 3

CC ID: 1144321

Time Frame Type:	Discrete
Start:	2017-04-23

Extent Group 1 / Time Frame 4

CC ID: 1144322

Time Frame Type:	Discrete
Start:	2017-04-24

Extent Group 1 / Time Frame 5

CC ID: 1144323

Time Frame Type:	Discrete
Start:	2017-05-08

Extent Group 1 / Time Frame 6

CC ID: 1144324

Time Frame Type:	Discrete
Start:	2017-05-09

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: 900610

Point Object Present?:	Yes
Point Object Count:	8153835735

Reference Systems

Reference System 1

CC ID: 1144317

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: 900621

Download URL:	https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9061
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: 900622

Download URL:	https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9061/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: 900612

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 2

CC ID: 900613

URL:	https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9061/supplemental/ny2017_southwest_spring_m9061.kmz
Name:	Browse graphic
URL Type:	Browse Graphic
File Resource Format:	KML
Description:	This graphic displays the footprint for this lidar data set.

URL 3

CC ID: 900656

URL:	https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9061/supplemental/NY17_Southwest_17_LiDAR_AXIS_Processing_and_Accuracy_Report_Final.pdf
Name:	Processing and Accuracy Report
URL Type:	Online Resource
Description:	Link to the Processing and Accuracy Report

URL 4

CC ID: 900657

URL:	https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9061/supplemental/NY17_Southwest_17_LiDAR_Survey_Report_06_19_17.pdf
Name:	Survey Report
URL Type:	Online Resource
Description:	Link to the Survey Report.

URL 5

CC ID: 900658

URL:	https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9061/supplemental/NY17_Southwest_17_Lidar_Acquisition_Report_08_22_2017.pdf
Name:	Acquisition Report
URL Type:	Online Resource
Description:	Link to the Acquisition Report.

URL 6

CC ID: 900659

URL:	https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9061/supplemental/Southwest_17_LIDAR_QualityReview_Report.pdf
Name:	Quality Review Report
URL Type:	Online Resource
Description:	Link to the Quality Review Report.

URL 7

CC ID: 900660

URL:	https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9061/breaklines/index.html
Name:	Breaklines
URL Type:	Online Resource
Description:	Link to the breaklines.

Data Quality

Horizontal Positional Accuracy:	NYS Office of Information Technology Services horizontal accuracy assessment: Early in the review process, an intensity image was made from all tiles. In select areas, the horizontal position of features such as sidewalk corners, painted lines, and pavement intersections on this intensity image were compared to the locations of the same features on reference data. In most cases, the reference data were orthoimages or vector data digitized from the orthoimagery. In some cases, NYSDOT design scale mapping accurate to +/- 6 cm was also used. Occasionally, the projectâs surveyed checkpoints also could be used. This check on the horizontal position of the LIDAR data was done to confirm a reasonable horizontal alignment before starting detailed vertical accuracy checks. Horizontal accuracy better than +/- 4-ft at 95%.
Vertical Positional Accuracy:	Axis surveyed 128 checkpoints independently of the control points used in calibrating the swath data. These checkpoints were well distributed over the project. A range of land cover types were included, with 75 points in the nonvegetated vertical accuracy (NVA) group and 53 points in the vegetated vertical accuracy (VVA) group. For the ~4459 km2 project, this number of checkpoints meets the number recommended in ASPRS Accuracy Standards for Digital Geospatial Data. The surveyed checkpoints showed an acceptable vertical accuracy of the bare earth surface from the classified LAS tiles for Quality Level 2. Using an ESRI LAS dataset, the surface was modeled using a TIN and elevations at checkpoint locations were calculated by draping the surface on the points. The NVA RMSE is 4.4 cm. NYS Office of Information Technology Services vertical accuracy assessment: To increase our ability to evaluate the vertical quality of the LIDAR-derived surface, we used data from NYSDOT mapping projects. Control points used in these projects are surveyed to better than +/- 3 cm, while the final photogrammetric mapping is tested to meet vertical accuracies of +/- 6 cm. Using this data source expanded the portions of the project which had quantifiable vertical checks. Given their source and the resulting preponderance of hard surface (NVA) points, the NYSDOT checkpoints were kept separate from the checkpoints discussed above. Using 474 points the RMSE = 7.44 cm.
Completeness Report:	These 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 Non-Vegetated Vertical Accuracy specifications. Points with extreme elevations (negative values, or positive values well above the expected maximum) are present in this dataset. These points are classified as low or high noise in classified point cloud tiles.
Conceptual Consistency:	Data covers 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

Data owner

CC ID: 1144314

Contact Role Type:	Originator
Contact Type:	Organization
Contact Name:	NYS Office of Information Technology Services

Process Steps

Process Step 1

CC ID: 1144315

Description:	LAS Point Classification: The point classification is performed as described below. The bare earth surface is 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 digitization. All ground (ASPRS Class 2) lidar data inside of 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 overlap data was processed through automated functionality provided by LasTools to appropriately bit flag overlapping flight line data per USGS specifications. All data was manually reviewed and any remaining artifacts removed using functionality provided by TerraScan and TerraModeler. Global Mapper was used as a final check of the bare earth dataset. LP360 was then used to create the deliverable industry-standard LAS files for both the All Point Cloud Data and the Bare Earth. New York Office of Information Technology Services 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:	2017-01-01 00:00:00

Description:

LAS Point Classification: The point classification is performed as described below. The bare earth surface is 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 digitization. All ground (ASPRS Class 2) lidar data inside of 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 overlap data was processed through automated functionality provided by LasTools to appropriately bit flag overlapping flight line data per USGS specifications. All data was manually reviewed and any remaining artifacts removed using functionality provided by TerraScan and TerraModeler. Global Mapper was used as a final check of the bare earth dataset. LP360 was then used to create the deliverable industry-standard LAS files for both the All Point Cloud Data and the Bare Earth. New York Office of Information Technology Services 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:

2017-01-01 00:00:00

Process Step 2

CC ID: 1144316

Description:	The NOAA Office for Coastal Management (OCM) downloaded 1982 laz files from ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/Elevation/LPC/Projects/USGS_LPC_NY_Southwest_East_2017_LAS_2018/ The files contained elevation and intensity measurements for the project area. The data were in UTM Zone 17, NAD 1983 (2011), meters coordinates and NAVD88 (Geoid12B) elevations in meters. The data were classified as: 1 - Unclassified, 2 - Ground, 7 - Noise, 9 - Water, 10 - Ignored Ground, 17 - Bridge Decks, 18 - High Noise. The NOAA Office for Coastal Management processed all classifications of points to the Digital Coast Data Access Viewer (DAV). Classes available on 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 Geoid 12B model, to convert from UTM Zone 17, NAD 1983 (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:	2020-03-23 00:00:00
Process Contact:	Office for Coastal Management (OCM)
ROR:	https://ror.org/05v14bq57

Related Items

Item Type	Relationship Type	Title
Data Set (DS)	Cross Reference	2017 NYS Lidar: Southwest NY (Fall)

Item Type

Relationship Type

Title

Data Set (DS)

Cross Reference

2017 NYS Lidar: Southwest NY (Fall)

Catalog Details

Catalog Item ID:	59075
GUID:	gov.noaa.nmfs.inport:59075
Metadata Record Created By:	Rebecca Mataosky
Metadata Record Created:	2020-03-23 11:34+0000
Metadata Record Last Modified By:	SysAdmin InPortAdmin
Metadata Record Last Modified:	2026-03-04 19:17+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

Item Identification