DOI: https://doi.org/10.5069/G9BP011S
OT Collection ID: OT.022026.32610.1
OT Collection Name: Monitoring Tree Water Stress, CA 2025
Short Name: CA25_Allen
Collection Platform: Airborne Lidar

----------------------------------------------------------

Download and Access Products: 
	1. Point Cloud Data
		opentopoID: OTLAS.022026.32610.1
		Data Processing: https://portal.opentopography.org/lidarDataset?opentopoID=OTLAS.022026.32610.1

	2. Raster
		opentopoID: OTSDEM.022026.32610.1
		Data Processing: https://portal.opentopography.org/raster?opentopoID=OTSDEM.022026.32610.1


----------------------------------------------------------

Collection Overview: This lidar dataset was collected as part of an NCALM Seed grant for Jean Allen at the California State University, Santa Barbara.  This lidar collection was used to quantify Leaf Area Index, and combined with hyperspectral data, quantify the ongoing changes in canopy architecture and oak mortality that has occurred at the Dangermond and Sedgwick Reserves since 2018.  Publications associated with this dataset can be found at NCALM's Data Tracking Center  

Dataset Acknowledgement: Lidar data acquisition and processing completed by the National Center for Airborne Laser Mapping (NCALM). NCALM funding provided by NSF's Division of Earth Sciences, Instrumentation and Facilities Program. EAR-2324629

Dataset Citation: Allen, J. (2026). Monitoring Tree Water Stress, CA 2025. National Center for Airborne Laser Mapping (NCALM). Distributed by OpenTopography. https://doi.org/10.5069/G9BP011S. Accessed 2026-02-25

Use License: CC BY 4.0

Dataset Keywords: lidar, ecology, Dangermond, Sedgwick,hydrology

Survey Date: 08/14/2025 - 08/16/2025
Publication Date: 02/24/2026

----------------------------------------------------------

Data Provider and Roles:
	1. California State University
	Role: Principal Investigator
	Url: Not Available.

	2. National Center for Airborne Laser Mapping
	Role: Collector
	Url: https://ncalm.cive.uh.edu/

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


----------------------------------------------------------

Total Number of Points: 1,415,364,223 pts

Area: 64.95 km^2

Point Density: 21.79 pts/m^2

Classifications: 
	Class 1 - Unclassified: 473,812,970
	Class 2 - Ground: 941,446,846
	Class 7 - Low Point (low noise): 104,407
Coordinates System: 
	Horizontal: WGS84 (ITRF2020) 2025.6178 epoch  / UTM Zone 10N Meters [EPSG: 32610]
	Vertical: WGS84 (Ellipsoid)

Survey Report: https://object.cloud.sdsc.edu:443/v1/AUTH_opentopography/www/metadata/CA25_Allen_metadata.pdf

LAS Validation Data Report: https://portal.opentopography.org/lasReport?opentopoID=OTLAS.022026.32610.1

----------------------------------------------------------

Dataset Boundary in GeoJSON Format: 
	Point Cloud: https://raw.githubusercontent.com/OpenTopography/Data_Catalog_Spatial_Boundaries/main/OpenTopography_Point_Cloud_Lidar/CA25_Allen.geojson
	Raster: https://raw.githubusercontent.com/OpenTopography/Data_Catalog_Spatial_Boundaries/main/OpenTopography_Raster/CA25_Allen.geojson

Dataset Extent (Bounding Box):
	North: 34.748028°
	South: 34.438659°
	East: -119.999966°
	West: -120.494915°