|December 2002 Lidar Point Data of Southern California Coastline: Dana Point to Point
|This data set contains lidar point data (latitude and longitude) from a strip of Southern
California coastline (including water, beach, cliffs, and top of cliffs) from Dana
Point to Point La Jolla. 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 single engine Cessna
206 (tail number N4589U) owned and operated by the Texas State Aircraft Pooling Board.
The lidar data set described by this document was collected on 3-4 December 2002 (33702
and 33802) between 20:33 and 23:29 UTC on 33702 and 20:26 and 21:19 UTC on 33802 (see
Lineage, Source_Information, Source_Contribution for pass information). Conditions
on both days were clear skies, no fog or low clouds. A second flight on 33802 was
required due to low cloud formation on 33702. 99d118 instrument settings for this
flight were; laser pulse rate: 25kHz, scanner rate: 26Hz, scan angle: +/-20deg, beam
divergence: narrow (wide for offshore pass), altitude: 700-820m AGL, and ground speed:
78-112kts. Two GPS base stations (Scripps pier and San Onofre Power Plant, see Lineage,
Source_Information, Source_Contribution for coordinates) were operating during the
survey. 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.