2011 Pacific Gas and Electric Diablo Canyon Power Plant (DCPP): Los Osos, CA Central Coast

The Diablo Canyon Power Plant (DCPP) LiDAR and Imagery datasets are comprised of three separate LiDAR surveys: Diablo Canyon (2010), Los Osos (2011), and San Simeon (2013). The DCPP Los Osos project study area is located in San Luis Obispo County, California, and encompasses approximately 170,000 acres (674.59 square kilometers). Watershed Sciences, Inc. (WSI) collected Light Detection and Ranging (LiDAR) data across the project area from 17 March 2011 to 31 March 2011. The LiDAR survey utilized a Leica ALS60 sensor in a Cessna Caravan. The Leica system was set to acquire 105,900 laser pulses per second (i.e., 105.9 kHz pulse rate) and flown at 900 meters above ground level (AGL), capturing a scan angle of +/- 14 degrees from nadir when clouds and terrain permitted. With these flight parameters, the laser swath width is 449 m and the laser pulse footprint is 21 cm. These settings yield an average native pulse density of equal-to-or-more-than 8 pulses per square meter over terrestrial surfaces.

This survey was flown as part of the DCPP Long-Term Seismic Program (LTSP)

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Pacific Gas and Electric Company shall not be held liable for improper or incorrect use of these data. Data and related graphics (e.g., GIF or JPG format files) are not legal documents and are not intended to be used as such. The information contained in the data is dynamic and may change over time. The data are not better than the original sources from which they were derived. It is the responsibility of the data user to use the data appropriately and consistently within the limitations of geospatial data in general and these data in particular. The related graphics are intended to aid the data user in acquiring relevant data; it is not appropriate to use the related graphics as data. PG&E gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these data. It is strongly recommended that these data are directly acquired from PG&E and not indirectly through other sources which may have changed the data in some way. Although these data have been processed successfully on computer systems by Pacific Gas and Electric and its authorized representatives, no warranty expressed or implied is made regarding the utility of the data on other systems for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data.

A report for this project is available at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/3651/supplemental/ca2011_pge_dcpp_los_osos_m3651_surveyreport.pdf

A footprint of this data set may be viewed in Google Earth at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/3651/supplemental/ca2011_pge_dcpp_los_osos_m3651.kmz

The lidar classification are stored in LAZ format.: 1 - unclassified, 2 - ground

All deliverables meet specifications in contract. LAS Files meet ASPRS Classification Standards

Any conclusions drawn from the analysis of this information are not the responsibility of Watershed Sciences Inc, PGandE, Diablo Canyon Power Plant, OpenTopography.com, NOAA, the Office for Coastal Management or its partners.

This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=3651

The data set is dynamically generated based on user-specified parameters.;

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Users should be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. These data depict the heights at the time of the survey and are only accurate for that time

RTK collects a relative error under 1.5cm for horizontal accuracy; Quantitative Value: 100 meters, Test that produced the value: Horizontal accuracy was tested by comparing the raw contours from each flightline against adjoining flightlines at specific points but was not tested against the data.

RMSE for Z = 0.028 m. The absolute vertical accuracy (RMSE) for the DCCP Los Osos survey is 2.8 cm and was calculated with an RTK sample six of 2,482 GPS measurements collected on hard surfaces distributed among multiple flight swaths.; Quantitative Value: 0.028 meters, Test that produced the value: The vertical accuracy of the LiDAR data is described as the mean and standard deviation (sigma) of divergence between LiDAR point coordinates and RTK ground survey point coordinates. To provide a sense of the model predictive power of the dataset, the root mean square error (RMSE) for vertical accuracy is also provided. These statistics assume the error distributions for x, y, and z are normally distributed, thus the skew and kurtosis of distributions are considered when evaluating error statistics.

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