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2011 - 2012 New York State Department of Environmental Conservation (NYSDEC) Lidar: Coastal New York (Long Island and along the Hudson River)

browse graphicThis kmz file shows the extent of coverage for the 2012 NYDES lidar data set.
Light Detection and Ranging (LiDAR) data is remotely sensed high-resolution elevation data collected by an airborne collection platform. This LiDAR dataset is a survey of areas of coastal New York, including Long Island, eastern Westchester, and the tidal extents of the Hudson River. The project area consists of approximately 950 square miles. The project design of the LiDAR data acquisition was developed to support a nominal post spacing of 1.0 meter or better (1.0 meter GSD). GMR Aerial Surveys Inc. d/b/a Photo Science, Inc. acquired 740 flight lines in 63 lifts between November 2011 and April 2012, while no snow was on the ground, rivers were at or below normal levels, no strong onshore winds, high waves, floods, or other anomalous weather conditions. Specified areas of the project were collected at a tide stage where water levels are at least 1-foot below mean sea level (MSL). This collection was a joint effort by the NOAA Coastal Services Center (CSC) and the New York State Department of Environmental Conservation. The data collection was performed with three Cessna 206 single engine aircrafts, utilizing Optech Gemini sensors; collecting multiple return x, y, and z as well as intensity data. The data were classified as Unclassified (1), Ground (2), Low Point (Noise) (7), Water (9), Breakline Edge (10), Withheld (11), Tidal Water (14), Overlap Default (17), and Overlap Ground (18), Overlap Water (25), and Overlap Tidal Water (30). Upon receipt, the NOAA Coastal Services Center (CSC), for data storage and Digital Coast provisioning purposes, converted these classifications to the following: 1 - Unclassified 2 - Ground 7 - Low Point (Noise) 9 - Water NOAA tide gauges were used as the basis for flight planning the tidally coordinated areas. Some areas were collected using tidal restraints as listed below: Tidal Wetlands and tributary mouths selected for tidal coordination at Mean Sea Level (MSL) minus 1 foot were: Rondout Creek Outlet; Vanderburg Cove, Moodna Creek, Constitution Marsh, Iona Marsh, Annsville Creek, Croton River Outlet, Marlboro Marsh, Manitou Marsh, Fishkill Creek Outlet, and Wappingers Creek Outlet. The Upper Hudson area from North of Goose Island was also collected to the same specification. Tidal Wetlands and tributary mouths selected for tidal coordination at Mean Sea Level (MSL) were: Haverstraw at Minisceongo Creek and Piedmont Marsh. The remainder of the project area had no tidal restrictions for collection. In order to post process the LiDAR data to meet task order specifications, Photo Science, Inc. established a total of 81 control points that were used to calibrate the LiDAR to known ground locations established throughout the New York project area. Trimble R8-3 GNSS receivers were used to complete the collection. Real Time Kinematic (RTK) survey methodology was typically performed using the New York State Spatial Reference Network (NYSNet), a CORS/Real Time GPS Network. Additionally, control values from various other projects completed by Photo Science in and around the project area, were used as supplemental control points to assist in the calibration of the LiDAR dataset. The dataset was developed based on a horizontal projection/datum of UTM NAD83 (NSRS2007), UTM Zone 18, meters and vertical datum of NAVD1988 (GEOID09), meters. Upon receipt, for data storage and Digital Coast provisioning purposes, the NOAA Coastal Services Center converted the data to GRS80 Ellipsoid (GEOID09) heights, to geographic (NAD83, NSRS2007) coordinates, and from las format to laz format. LiDAR data were collected in RAW flightline swath format, processed to create Classified LAS 1.2 Files formatted to 2093 individual 750m x 750m tiles, Hydro Flattening Breaklines in Esri 1.0 meter gridded V-Datum ESRI Grid files formatted to the same 3000m x 3000m tile schema. LiDAR Data was originally delivered to NOAA/Dewberry for quality control validation under Delivery Lots 1 and 2. The lineage (data quality), positional, content (completeness), attribution, logical consistency, and accuracies of all digital elevation data produced conform to the specifications stipulated in NOAA Task Order EA133C11CQ0009 - T011.

Cite this dataset when used as a source.

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    Distribution Formats
    • LAZ
    Distributor DOC/NOAA/NOS/OCM > Office for Coastal Management, National Ocean Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce
    Point of Contact DOC/NOAA/NOS/OCM > Office for Coastal Management, National Ocean Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce
    843-740-1200
    coastal.info@noaa.gov
    Documentation links not available.
    Originator
    • DOC/NOAA/NOS/OCM > Office for Coastal Management, National Ocean Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce
    Originator
    • New York State Department of Environmental Conservation
    Publisher
    • DOC/NOAA/NOS/OCM > Office for Coastal Management, National Ocean Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce
    Date(s)
    • publication: 2012-11-01
    Data Presentation Form: Digital image
    Dataset Progress Status Complete
    Data Update Frequency: Unknown
    Supplemental Information: Lifts were flown out of specific airports at which base stations were set up and, sometimes, specific tide stations were used, creating another break in areas. 1B1 contained 46 flight lines and was flown on January 9, 2012 and January 11, 2012 with Optech SN247 in N2448G. 20N contained 39 flight lines and was flown on February 19-20, 2012 with Optech SN247 in N2448G. ALB contained 31 flight lines and was flown on January 7, 2012 and January 9, 2012 with Optech SN247 in N2448G. FRG-NOAA contained 144 flight lines flown on February 2-6, 2012; February 9, 2012; February 13-14, 2012 with Optech SN247 in N2448G. GON contained 15 flight lines flown on November 26, 2011 with Optech SN240 in N9471R. HTO contained 92 flight lines flown on January 15-16, 2012; January 18, 2012; and January 20, 2012 with Optech SN247 in N2448G. HWV contained 110 flight lines flown on January 25, 2012; January 28, 2012; January 30-31, 2012 with Optech SN247 in N2448G. POU contained 94 flight lines flown on December 12-14, 2012; and December 16, 2012 with Optech SN240 in N9471R. SWF-NOAA contained 32 flight lines flown on December 18-19, 2011 with Optech SN240 in N9471R. HPN contained 37 flight lines flown on April 6-7, 2012 with Optech SN246 in N7266Z. 1B1-TID-HUDSON contained 5 flight lines and was flown on February 20, 2012 with Optech SN247 in N2448G. HPN-TID-CROTON contained 5 flight lines flown on February 19, 2012 with Optech SN247 in N2448G. HPN-TID-HARVEST contained 6 flight lines flown on February 19, 2012 with Optech SN247 in N2448G. HPN-TID-PIERMON contained 4 flight lines flown on February 18, 2012 with Optech SN247 in N2448G SWF-TID-IONA-MA contained 9 flight lines flown February 17, 2012 with Optech SN247 in N2448G. SWF-TID-MARL-WA contained 5 flight lines flown February 17, 2012 with Optech SN247 in N2448G. SWF-TID-MOOD-FI contained 7 flight lines flown February 17, 2012 with Optech SN247 in N2448G.
    Purpose: The project was developed by the National Oceanic and Atmospheric Administration's (NOAA) Coastal Services Center in partnership with the New York State Department of Environmental Conservation (NYSDEC) to collect and deliver topographic elevation point data derived from multiple return light detection and ranging (LiDAR) measurements for areas of coastal New York including Long Island, eastern Westchester, and the tidal extents of the Hudson River. Data are intended for use in coastal management decision making, including applications such as detailed mapping of areas at risk of sea level rise according to projections developed by NYS and the remapping of Coastal Erosion Hazard Areas. 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.
    Use Limitations
    • These data depict the elevations at the time of the survey and are only accurate for that time. 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. Any conclusions drawn from analysis of this information are not the responsibility of NOAA or any of its partners. These data are NOT to be used for navigational purposes.
    Time Period: 2011-11-26  to  2012-04-07
    Spatial Reference System: urn:ogc:def:crs:EPSG::4269 Ellipsoid in Meters
    Spatial Bounding Box Coordinates:
    N: 42.786433
    S: 40.558624
    E: -71.828074
    W: -74.078028
    Spatial Coverage Map:
    Themes
    • Bathymetry/Topography
    • model
    • LiDAR
    • DEM
    • Raster
    • breaklines
    • remote sensing
    • elevation
    • las
    Places
    • United States
    • New York
    • Hudson River
    • Long Island
    • Albany County
    • Columbia County
    • Dutchess County
    • Greene County
    • Nassau County
    • Putnam County
    • Suffolk County
    • Ulster County
    • Westchester County
    • Albany
    • Kingston
    • Poughkeepsie
    • Yonkers
    • Great Neck
    • Larchmont
    • Shelter Island
    • Plum Island
    • Fishers Island
    • Gardiners Island
    • Montauk
    • Fire Island
    • Point Lookout
    Use Constraints No constraint information available
    Fees Fee information not available.
    Lineage Statement Lineage statement not available.
    Processor
    • DOC/NOAA/NOS/OCM > Office for Coastal Management, National Ocean Service, National Oceanic and Atmospheric Administration, U.S. Department of Commerce
    • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
    Processing Steps
    • Control Process: Photo Science, Inc. established a total of 81 control points that were used to calibrate the LiDAR to known ground locations established throughout the New York project area to be used in the post processing of the LiDAR data. The points were located on relatively flat terrain on surfaces that generally consisted of grass, gravel, pavement or bare earth and were in well- defined discrete locations. Additionally, points collected for Photo Science from various projects located in the region were also used to adjust the LiDAR data to the final elevation. Surveyed points were used from the Northeast LiDAR and Fire Island, NY LiDAR projects for United States Geological Survey (USGS). See Final Survey Reports for additional collection parameters and methodologies. Raw Flight Line Process: Applanix software was used in the post processing of the airborne GPS and inertial data that is critical to the positioning and orientation of the sensor during all flights. POSPac MMS provides the smoothed best estimate of trajectory (SBET) that is necessary for Optech's post processor to develop the point cloud from the LiDAR missions. The point cloud is the mathematical three dimensional collection of all returns from all laser pulses as determined from the aerial mission. At this point this data is ready for analysis, classification, and filtering to generate a bare earth surface model in which the above ground features are removed from the data set. The point cloud was manipulated within the Optech software; GeoCue, TerraScan, and TerraModeler software was used for the automated data classification, manual cleanup, and bare earth generation from this data. Project specific macros were used to classify the ground and to remove the side overlap between parallel flight lines. All data was manually reviewed and any remaining artifacts removed using functionality provided by TerraScan and TerraModeler. Classified LAS Process: 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) were reclassified to the correct classification after the automated classification was completed. A class has been added to the dataset to represent the tidal water of the ocean/tidal areas collected throughout the project area. ASPRS Class 14 is being used to represent the tidal water ocean surface. While attempts were made to remove all extraneous features above the surface of the water, there may be above surface features classified to this class. Some islands below the required collection specifications have been classified to this class as well. This class was also used during the creation of the ERDAS Imagine Tidal Water Raster DEM files. The Tidal Water breaklines were used to complete the automated classification of these classes within the final LAS files. 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 (USGS Overlap Default) and Class 18 (USGS 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 NOAA through numerous conference calls and pilot study areas. Data was then run through additional macros to ensure deliverable classification levels matching the ASPRS LAS Version 1.2 Classification structure. GeoCue functionality was then used to ensure correct LAS Versioning. In-house software was used as a final QA/QC check to provide LAS Analysis of the delivered tiles. QA/QC checks were performed on a per tile level to verify final classification metrics and full LAS header information. All ground (ASPRS Class 2) LiDAR data inside of the collected inland 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. These points were moved from ground (ASPRS Class 2) to Ignored Ground (ASPRS Class 10). All ground (ASPRS Class 2) LiDAR data inside of the collected tidal/ocean breaklines were then classified to tidal water (USGS Class 14) using TerraScan macro functionality. A buffer of 1 meter was also used around each hydro flattened feature. These points were moved from ground (ASPRS Class 2) to Ignored Ground (ASPRS Class 10). A manual QA review of the tiles was completed using in-house proprietary software to ensure full coverage, correct deliverable classification within the project area.
    • The NOAA Coastal Services Center (CSC) received the data in las format. The files contained lidar elevation and intensity measurements. The data were received in UTM, Zone 18 coordinates and vertically referenced to NAVD88 using the Geoid09 model. The vertical units of the data were meters. CSC performed the following processing for data storage and Digital Coast provisioning purposes: 1. Files were filtered for elevation outliers. 2. Files were converted from orthometric (NAVD88) heights to ellipsoidal heights using Geoid09. 3. Files were converted from UTM, Zone 18 coordinates to geographic (NAD83, NSRS2007) coordinates 4. Classifications were changed from Unclassified (1), Ground (2), Low Point (Noise) (7), Water (9), Breakline Edge (10), Withheld (11), Tidal Water (14), Overlap Default (17), and Overlap Ground (18), Overlap Water (25), and Overlap Tidal Water (30) to Unclassified (1), Ground (2), Low Point (Noise) (7), and Water (9). 5. The data were converted to LAZ format.
    • The NOAA National Geophysical Data Center (NGDC) received lidar data files via ftp transfer from the NOAA Coastal Services Center. The data are currently being served via NOAA CSC Digital Coast at http://www.csc.noaa.gov/digitalcoast/. The data can be used to re-populate the system. The data are archived in LAS or LAZ format. The LAS format is an industry standard for LiDAR data developed by the American Society of Photogrammetry and Remote Sensing (ASPRS); LAZ is a loseless compressed version of LAS developed by Martin Isenburg (http://www.laszip.org/). The data are exclusively in geographic coordinates (either NAD83 or ITRF94). The data are referenced vertically to the ellipsoid (either GRS80 or ITRF94), allowing for the ability to apply the most up to date geoid model when transforming to orthometric heights.

    Metadata Last Modified: 2013-01-22

    For questions about the information on this page, please email: mike.sutherland@noaa.gov