DOI: https://doi.org/10.5069/G9BG2KW9
OT Collection ID: OT.052010.26910.1
OT Collection Name: Napa Watershed, CA
Short Name: Napa
Collection Platform: Airborne Lidar

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Download and Access Products: 
	1. Point Cloud Data
		opentopoID: OTLAS.052010.26910.1
		Data Processing: https://portal.opentopography.org/lidarDataset?opentopoID=OTLAS.052010.26910.1

	2. Google Earth Image Overlays
		opentopoID: OTGE.052010.26910.1
		Download: https://portal.opentopography.orghttps://cloud.sdsc.edu/v1/AUTH_opentopography/www/files/NapaWatershed_CA.kml


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Collection Overview: These data were acquired by the National Center for Airborne Laser Mapping (NCALM) in 2003. They have kindly agreed to make these data available to the research community through OpenTopography.Note: This is a classified last return dataset (i.e. there is not first return / canopy top data included).  A bare earth model can be created from these data, but a model generated from the full point cloud produces something that approximates a low vegetation surface - not ground, but also not canopy top.UPDATE: Full unfiltered 2003 point cloud ASCII files. Bulk download of the original unfiltered ASCII files (64 GB) from the 2003 Napa Watershed collection by the National Center for Airbone Laser Mapping (NCALM). The original ASCII data has been made available in response to the August 26, 2014 Mw 6.0 South Napa Earthquake.Publications associated with this dataset can be found at NCALM's Data Tracking Center

Dataset Acknowledgement: Lidar data acquired by the National Center for Airborne Laser Mapping (NCALM).

Dataset Citation: Napa Watershed, CA. Distributed by OpenTopography. https://doi.org/10.5069/G9BG2KW9 . Accessed: 2024-12-22

Use License: CC BY 4.0

Dataset Keywords: California, lidar

Survey Date: 05/15/2003 - 06/01/2003
Publication Date: 05/01/2010

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Data Provider and Roles:
	1. National Center for Airborne Laser Mapping
	Role: Collector
	Url: https://ncalm.cive.uh.edu/

	2. National Science Foundation
	Role: Funder
	Url: https://nsf.gov/


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Total number of points: 2,097,819,679 pts

Area: 1,451 km^2

Point Density: 1.45 pts/m^2

Classifications: 
	Class 1 - Unclassified: 1,431,819,891
	Class 2 - Ground: 664,915,042
	Class 7 - Low Point (low noise): 1,033,451
	Class 9 - Water: 28,821
	Class 10 - Rail: 22,474
Coordinates System: 
	Horizontal: NAD83 / UTM Zone 10N Meters [EPSG: 26910]
	Vertical: NAVD88 (GEOID99) [EPSG: 5703]

Survey Report: https://cloud.sdsc.edu/v1/AUTH_opentopography/www/metadata/2003_Napa_NCALM_Metadata.pdf

LAS Validation Data Report: http://cloud.sdsc.edu/v1/AUTH_opentopography/www/lasReports/Napa.html

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Dataset Extent in KMZ format: https://portal.opentopography.org/getKml?otCollectionID=OT.052010.26910.1&download=true

Dataset Spatial Bounds:
	North: 38.686034°
	South: 38.053093°
	East: -122.175871°
	West: -122.655486°