|March 2006 Lidar Point Data of Southern California Coastline: Long Beach to US/Mexican
|This data set contains lidar point data (Geodetic Coordinates) from a strip of Southern
California coastline (including water, beach, cliffs, and top of cliffs) from Long
Beach to the US/Mexico border. The data set was created by combining data collected
using an Optech Inc. Airborne Laser Terrain Mapper (ALTM) 1225 in combination with
geodetic quality Global Positioning System (GPS) airborne and ground-based receivers.
The Bureau of Economic Geology, the University of Texas at Austin owns and operates
an ALTM 1225 system (serial number 99d118). The system was installed in a twin engine
Partenavia P-68 (tail number N3832K) owned and operated by Aspen Helicopter, Inc.
The lidar data set described by this document was collected on 24 and 25 March 2006;
Julian Days 08306 and 08406 (see Lineage, Source_Information, Source_Contribution
for pass information). 99d118 instrument settings for these flights were; laser pulse
rate: 25kHz, scanner rate: 26Hz, scan angle: +/- 20deg, beam divergence: narrow, altitude:
300-600m AGL, and ground speed: 95-120kts. Two GPS base stations were operating during
each day of the survey, Point Loma and San Onofre on 08306 and Seal Beach and San
Onofre on 08406 (see Lineage, Source_Information, and Source Contribution for coordinates).
Data represented is all points including terrain, vegetation, and structures. This
data also contains returns from the water surface. No processing has been done to
remove returns from terrain, vegetation, structures or water surfaces.