2009 USGS New Jersey Lidar: Mercer County
This kmz file shows the extent of coverage for the 2009 USGS Mercer County, NJ lidar data set.
High accuracy LiDAR data covering Mercer County New Jersey (228 sq miles). These datasets will be the initial acquisition to support general geospatial needs of the USGS and the New Jersey Department of Environmental Protection (NJ-DEP).
|Distributor||DOC/NOAA/NOS/OCM > Office for Coastal Management, National Ocean Service, National
Oceanic and Atmospheric Administration, U.S. Department of Commerce
|Dataset Point of Contact||Roger Barlow
USGS Geospatial Liason for DC, DE, MD, NJ, and Chesapeake Bay
U.S. Geological Survey
|Data Presentation Form:||
|Dataset Progress Status||Complete|
|Data Update Frequency:||Not planned|
- Technical Acquisition Parameters: Utilizing Leica ALS50 II laser systems which can collect data at laser pulse rates up to 150 KHz, Photo Science flew the project area at 7,000 feet AGL and utilized a 19 degree full-angle field of view. Flights were accomplished nominally at 98 knots (ground speed) with a pulse rate of 113,600Hz, collecting four returns per pulse. The scan rate was be set at 50.4Hz. These settings resulted in a swath of 2,343 feet with maximum along track and cross track spacing of 3.28 feet (1.0 meters). - Environmental Acquisition Conditions: Leaf-Off, snow free, non-flood conditions. - Nominal Pulse density: Average point density is 3.15 points per sq. Meter Average point spacing is 0.56 meters. - Calibration procedures: Photo Science has created a significant boresight facility at the Frankfort, KY airport where the Lidar platforms are stationed when not in service. Boresighting at this facility takes place with our Lidar sensors at numerous times throughout the year. Additionally, a mini-calibration site was established at the Robbinsville Airport at the project site. Additional calibration flights were conducted over this site to ensure accurate determination of the calibration parameters throughout the times of acquisition. - GPS: Acquisition for this project was completed using the base station from the NGS database selected near the center of the acquisition area to serve as control for all lifts. A ground based GPS receiver was occupied at the station during all aerial collection. The published NGS positions of the base station and raw GPS observation data were used in the kinematic GPS post-processing of all lifts to provide positioning for the point clouds produced for this project. - Maximum and mean differential baseline lengths: Nominal Maximum base line distance was approximately 20 Miles Mean base line distance was approximately 11 Miles - Geoid Model Used: Geoid 03 was used for all height conversion from ellipsoidal to orthometric heights. - Reference System: Horizontal: New Jersey State Plane Coordinate System, 1983 North American Datum, feet Vertical: North American Vertical Datum of 1988 (NAVD88), feet.
|Purpose:||The purpose of the Mercer County Lidar project is to provide LiDAR data for New Jersey Department of Environmental Protection (NJ-DEP). This project acquired and produced high accuracy bare-earth processed LiDAR data in LAS format and 1.0-meter Digital Elevation Models (DEMs) in ArcGrid format for approximately 228 square miles of Mercer County.|
|Time Period:||2009-03-31 to 2009-04-25|
|Spatial Reference System:||urn:ogc:def:crs:EPSG::4269 Ellipsoid in Meters|
|Spatial Bounding Box Coordinates:||
|Spatial Coverage Map:|
|Use Constraints||No constraint information available|
|Fees||Fee information not available.|
Last Modified: 2013-06-04
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