|2010 U.S. Geological Survey (USGS) Topographic Lidar: Channel Islands, California
||Terrapoint collected LiDAR for 197 square miles covering five islands off the coast
of Los Angeles, California. These islands are part of the Channel Islands National
Park and consists of San Miguel Island, Santa Rosa Island, Santa Cruz Island, Anacapa
Island, and Santa Barbara Island. The nominal pulse spacing for this project was better
than 0.7 meters. This project was collected with a sensor which collects waveform
data and provides an intensity value for each discrete pulse extracted from the waveform.
GPS Week Time, Intensity, Flightline and echo number attributes were provided for
each LiDAR point. Dewberry used proprietary procedures to classify the LAS according
to USGS ARRA specifications: 1-Unclassified 2-Ground 7-Noise 9-Water 10-Ignored Ground
due to breakline proximity. Dewberry produced 3D breaklines, seamless DSMs, and seamless
hydro flattened DEMs for the 204 tiles (2000 m x 2000 m) that cover the project area.
Area mapped by island is as follows: Santa Barbara Island-1 sq. mi. Anacapa Island-1
sq. mi. San Miguel Island-15 sq. mi. Santa Rosa Island-83 sq. mi. Santa Cruz Island-97
sq. mi. Two UTM zones cover the Channel Islands. The islands delivered per each UTM
zone are as follows (please note that Santa Rosa Island was delivered in both UTM
zone 10 and UTM zone 11): UTM Zone 10: Santa Rosa Island San Miguel Island UTM Zone
11: Santa Barbara Island Santa Rosa Island Santa Cruz Island Anacapa Island The NOAA
Coastal Services Center received the data in UTM Zones 10 and 11. The data were converted
to geographic coordinates and from NAVD88 heights to ellipsoid heights using GEOID09.
These files were converted for data storage and Digital Coast provisioning purposes.