DOI: https://doi.org/10.5069/G9348HMJ
OT Collection ID: OT.022026.6342.1
OT Collection Name: Mapping Rock Glaciers in the San Juan Mountains, CO 2025
Short Name: CO25_Ruef
Collection Platform: Airborne Lidar

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Download and Access Products: 
	1. Point Cloud Data
		opentopoID: OTLAS.022026.6342.1
		Data Processing: https://portal.opentopography.org/lidarDataset?opentopoID=OTLAS.022026.6342.1

	2. Raster
		opentopoID: OTSDEM.022026.6342.1
		Data Processing: https://portal.opentopography.org/raster?opentopoID=OTSDEM.022026.6342.1


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Collection Overview: This lidar dataset was collected as part of an NCALM Seed grant for Juliana Ruef at the University of Colorado, Boulder.  This dataset was collected to help monitor rock glacier motion and dynamics in the San Juan Mountains in Colorado. 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: Ruef, J. (2026). Mapping Rock Glaciers in the San Juan Mountains, CO 2025. National Center for Airborne Laser Mapping (NCALM). Distributed by OpenTopography. https://doi.org/10.5069/G9348HMJ. Accessed 2026-03-03

Use License: CC BY 4.0

Dataset Keywords: glacier, lidar, geomorphology, glaciology, San Juan

Survey Date: 08/13/2025
Publication Date: 02/27/2026

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Data Provider and Roles:
	1. University of Colorado, Boulder
	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/


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Total Number of Points: 545,838,048 pts

Area: 67.16 km^2

Point Density: 8.13 pts/m^2

Classifications: 
	Class 1 - Unclassified: 78,166,268
	Class 2 - Ground: 467,663,709
	Class 7 - Low Point (low noise): 4,077
	Class 18 - High Noise: 3,994
Coordinates System: 
	Horizontal: NAD83 (2011) (EPOCH:2010) / UTM Zone 13N Meters [EPSG: 6342]
	Vertical: NAVD88 (GEOID 18) [EPSG: 5703]

Survey Report: https://object.cloud.sdsc.edu:443/v1/AUTH_opentopography/www/metadata/CO25_Ruef_metadata.pdf

LAS Validation Data Report: https://portal.opentopography.org/lasReport?opentopoID=OTLAS.022026.6342.1

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Dataset Boundary in GeoJSON Format: 
	Point Cloud: https://raw.githubusercontent.com/OpenTopography/Data_Catalog_Spatial_Boundaries/main/OpenTopography_Point_Cloud_Lidar/CO25_Ruef.geojson
	Raster: https://raw.githubusercontent.com/OpenTopography/Data_Catalog_Spatial_Boundaries/main/OpenTopography_Raster/CO25_Ruef.geojson

Dataset Extent (Bounding Box):
	North: 37.992307°
	South: 37.891675°
	East: -107.660992°
	West: -107.789615°