2006 FEMA New Jersey Flood Mitigation Lidar: Hunterdon County
This kmz file shows the extent of coverage for the 2006 FEMA Hunterdon County, NJ lidar data set.
This metadata record describes the lidar topographic elevation mapping of Hunterdon County, NJ that occurred in July 2006. Products generated include lidar point clouds in LAS 1.0 collected with a Leica ALS-50 Aerial Lidar Sensor.
|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||Federal Emergency Management Agency, Region II
Documentation links not available.
|Data Presentation Form:||
|Dataset Progress Status||Complete|
|Data Update Frequency:||Unknown|
Watershed Concepts requested the collection of lidar data over Hunterdon County, NJ. In response, EarthData acquired the data on July 17, 2006 using its aircraft with tail number N806CP. Lidar data was acquired using an ALS-50 Lidar Sensor, including an inertial measuring unit (IMU) and a dual frequency GPS receiver. An additional GPS receiver was in constant operation over a published control point set by EarthData at the base of the operations airport which is a secondary airport control station. Terrasurv was tasked to perform a geodetic control survey in support of lidar mapping in Hunterdon County, NJ. The Global Positioning System (GPS) was used in static differential mode to measure the intersection vectors of the network. In addition to six locations chosen for control, a survey point located at the Lehigh valley International Airport was included in the network. This latter station was used a base station by the flight crew during data acquisition. The horizontal datum was the North American Datum of 1983-CORS (NAD83 CORS) and the vertical datum was the North American Vertical Datum of 1988. During the data acquisition, the receivers collected phase data at an epoch rate of 1 Hz. The use of the airport base station ensured that all data capture was within 50 miles of a base station. The solutions from Hunterdon County, NJ were found to be of high integrity and met the accuracy requirements for the project. These accuracy check also verified that the data meets the guidelines outlined in FEMA's Guidelines and Specifications for Flood Hazard Mapping Partners and Appendix 4B, Airborne Light detection and Ranging Systems. The areas of interest were flown at an altitude of 8500 feet above mean terrain. Airspeed - 145 knots Laser Pulse Rate - 38000 Hz Field of View - 40 degrees Scan Rate - 20 Hz Swath Width - 1996 meters
|Purpose:||The purpose of this data is to support floodplain mapping efforts as part of FEMA's Map Modernization Program.|
|Time Period:||Unknown to Unknown|
|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: 2013-06-11
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