McKittrick Canyon Reef Trail strat section, Guadalupe Mtns Nat. Park, TX

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Dataset includes SfM point cloud of northeastern edge of McKittrick Canyon in Guadalupe Mountains national park. Point cloud spans portions of the reef trail, extending from carbonate ramp/slope deposits, to overlying massive reef (large cliffs), and backreef deposits (flat layers with overhangs). SfM photographs were collected with handheld 55mm zoom lens DSLR camera in May, 2018. Photograph locations were geotagged using an Arrow gold GPS unit to 3D accuracy of ~2 m. Bare-earth airborne lidar dataset was used as reference cloud in iterative closest point alignment in CloudCompare V2.12: No vegetation filtering or clipping was performed on SfM derived point cloud. M3C2 cloud-to-cloud difference between lidar point cloud and SfM point cloud with default parameters and SfM model as cloud 1 yields 1-sigma cloud-to-cloud difference of 0.96 m and 2-sigma cloud-to-cloud difference of 2.38 m. Lidar point cloud contains significant large holes in cliff overhang locations. Accuracy is likely not sufficient for change detection analysis but is sufficient for morphometric analysis and stratigraphic mapping.

opentopoID: OTDS.052021.6342.1
Platform: Structure from Motion / Photogrammetry
Data Format: Point Cloud, Images
Dataset Acknowledgement: Funding was provided by NSF EAR-1608014 awarded to R.A. DiBiase and Scholten-Williams-Wright Scholarship awarded to A.B. Neely and E.A Loucks. NCALM seed grant awarded to A.B. Neely was used to georeference SfM model ( A.B. Neely would like to thank Elizabeth Hajek, Mark Patzkowsky, and PSU field stratigraphy class of '18 for their support during field data collection.
Dataset Citation: Neely, A., DiBiase, R.A., Loucks, E.A. (2021). McKittrick Canyon Reef Trail strat section, Guadalupe Mtns Nat. Park, TX . Distributed by OpenTopography. Accessed: 2022-10-05
Survey Date: 05/10/2018 - 05/12/2018
Survey Area: 0.84 km2
Publication Date: 05/14/2021
Number of lidar returns: 33,528,013 pts
Point Density: 39.92 pts/m2
Coordinates System:
Horizontal: NAD83(2011) / UTM zone 13N [EPSG: 6342]
Vertical: NAVD88 [EPSG: 5703]

3D Point Cloud Viewer

Spatial Extent
    Point Cloud Data
  File Name Size Points Area (m2) Density  
1     McKittrick_reefTrail_N_2018_55mmSfM_epsg6342_FIN.laz     242.46 MB     33,528,013     839,863     39.92         View Detail    
COMPD_CS["unknown",PROJCS["NAD83(2011) / UTM zone 13N",GEOGCS["NAD83(2011)",DATUM["NAD83_National_Spatial_Reference_System_2011",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","1116"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","6318"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-105],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","6342"]],VERT_CS["unknown",VERT_DATUM["unknown",2005],UNIT["metre",1.0,AUTHORITY["EPSG","9001"]],AXIS["Up",UP]]]
Lat/Lon/Elevation Boundary:
North-East (lat,lon,elev): [31.99776907, -104.756054, 2150.78]
South-West (lat,lon,elev): [31.98714845, -104.7677839, 1544.84]
Coordinates Boundary:
North-East (X,Y): 523042.6, 3540211.97]
South-West (X,Y): 521937.13, 3539037.18]
Class 0 (Created, never classified):     33,528,013
    Images Files
  File Name Size Dimensions  
1     McKittrick_canyonN_dip_dir_153deg_parr_5cm_orthophoto.tif     40.03 MB     29172 x 13725        
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Bulk Download     opentopoID: OTDS.052021.6342.1

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