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2007 US Army Corps of Engineers (USACE) National Coastal Mapping Topobathy Lidar (Bare Earth) - New York (Lake Erie shoreline)

This is a bare earth data set. The data contained in these files contain hydrographic and topographic data collected by the CHARTS system along the Lake Erie coast of NY in Chautauqua and Erie Counties, from July 26 - August 4, 2007. The data were collected and processed in geographic coordinates and ellipsoid heights. The positions were relative to NAD83 in decimal degrees of longitude and latitude. The heights were converted from ellipsoid to orthometric heights (NAVD88) using the Geoid03 model with the results in meters. CHARTS integrates topographic and bathymetric lidar sensors, a digital camera and a hyperspectral scanner on a single remote sensing platform for use in coastal mapping and charting activities. Data coverage generally extends along the coastline from the waterline inland 500 meters (topography) and offshore 1,000 meters or to laser extinction (bathymetry). The topographic lidar sensor has a pulse repetition rate of 9 kHz at 1064 nm (near-infrared wavelength). The bathymetric lidar sensor has a pulse repetition rate of 1 kHz at 532 nm (green wavelength). Native lidar data is not generally in a format accessible to most Geographical Information Systems (GIS). Specialized in-house and commercial software packages are used to process the native lidar data into 3-dimensional positions that can be imported into GIS software for visualization and further analysis.
Cite this dataset when used as a source.
Other Access Online access information not available.
Distribution Formats Format not available
    Distributor Coastal Elevation Mapping (CEM) Project Scientist
    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)
    Dataset Point of Contact Data Production Manager
    Documentation links not available.
    • publication: 2009-01-01
    Dataset Progress Status Complete
    Data Update Frequency: As needed
    Purpose: These data were collected as a part of the National Coastal Mapping Program to depict the elevations above and below the water for the New York coastal zone.
    Use Limitations
    • Any conclusions drawn from the analysis of this information are not the responsibility of the USACE, JALBTCX, the Coastal Services Center or its partners. Disclaimer While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
    • JALBTCX (Joint Airborne Lidar Bathymetry Technical Center of Expertise)
    • Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)
    • NOAA's Ocean Service, Coastal Services Center (CSC)
    Time Period: 2007-07-26 to 2007-08-04
    Spatial Reference System: urn:ogc:def:crs:EPSG::4269
    Spatial Bounding Box Coordinates:
    N: 42.930728
    S: 42.218770
    E: -78.804432
    W: -79.772569
    Spatial Coverage Map:
    Theme keywords None
    • Bathymetry/Topography
    • Lidar
    • Topography
    • Elevation
    • Last Return
    Place keywords None
    • US
    • New York
    • Chautauqua County
    • Erie County
    • Lake Erie
    Stratum keywords None
    • NCMP
    • U.S. Army Corps of Engineers, Mobile District
    • CHARTS
    • SHOALS
    Use Constraints
    • 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.
    Access Constraints
    • Access Constraints: None
    Fees Fee information not available.
    Lineage information for: dataset
    • Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)
    • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
    Processing Steps
    • 2008-01-01T00:00:00 - These data were collected using the CHARTS surveys system. It is owned by the Naval Oceanographic Office and operated through contract. The system collects topographic lidar data at 20 kHz and hydrographic data at 3 kHz. The system also collects RGB imagery at 1Hz. A CASI-1500 hyperspectral line scanner is integrated with the system as well. Aircraft position, velocity and acceleration information are collected through a combination of Novatel and POS A/V equipment. Raw data are collected and transferred to the office for downloading and processing in SHOALS GCS software. GPS data are processed using POSPac software and the results are combined with the lidar data to produce 3-D positions for each lidar shot. These data are edited using Fledermaus software where anomalous data are removed from the dataset. The data are converted from ellipsoid to orthometric heights, based on the GEOID03 model, within the chartsLAS program.
    • 2009-06-01T00:00:00 - The NOAA Coastal Services Center (CSC) received topographic and hydrographic files in ASCII format. The files contained LiDAR elevation and intensity measurements. The points were classed as 'never classified.' LASEdit was used to bare earth classify the data. The data were provided in geographic coordinates and ellipsoidal heights and in orthometric heights. CSC performed the following processing to the ellipsoidal height data to make it available within the Digital Coast: 1. LASEdit was used to convert the ASCII formatted files to las format. 2. The hydrographic point's classification was changed from 'never classified' to class 11, 'bathymetry'. 3. The topographic points were bare earth classified using LASEdit. 4. The LAS data were sorted by latitude and the headers were updated.
    • 2011-04-28T00:00:00 - The NOAA National Geophysical Data Center (NGDC) received Lidar data files by ftp. The data received compressed containing LiDAR data from the NOAA Coastal Services Center. The data are currently being served via Digital Coastl at The data can be used to re-populate the system. The data are provided in LAS format. LAS format is an industry standard for serving LiDAR data. The data are exclusively in geographic coordinates, however, the datums used vary. Most are NAD 83, however some are in ITRF. Vertical systems include both ellipsoid (ITRF and NAD 83) and NAVD 88. For NAVD 88 values, Geiod 03 is primarily used; however, data received in NAVD 88 prior to 2003 was processed using Geoid 99.
    Processing Environment Native Dataset Environment: Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog
    Last Modified: 2011-11-19
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