Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content
  • Feedback
    • This is a Non-Federal dataset covered by different Terms of Use than Data.gov.

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

    Metadata Updated: May 21, 2021

    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: https://doi.org/10.5069/G9BK19G8. 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.

    Access & Use Information

    Non-Federal: This dataset is covered by different Terms of Use than Data.gov. License: No license information was provided.

    Downloads & Resources

    Dates

    Metadata Date May 14, 2021
    Metadata Created Date May 21, 2021
    Metadata Updated Date May 21, 2021
    Reference Date(s) May 14, 2021 (publication)
    Frequency Of Update

    Metadata Source

    Harvested from OpenTopography CSW

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date May 14, 2021
    Metadata Created Date May 21, 2021
    Metadata Updated Date May 21, 2021
    Reference Date(s) May 14, 2021 (publication)
    Responsible Party Alexander Neely (Originator); Emily Loucks (Originator); Roman DiBiase (Originator); OpenTopography (Originator)
    Contact Email
    Guid OTDS.052021.6342.1
    Access Constraints
    Bbox East Long -104.755484530973
    Bbox North Lat 31.9981715327445
    Bbox South Lat 31.9866605594117
    Bbox West Long -104.767826867854
    Coupled Resource
    Frequency Of Update
    Harvest Object Id 1f2a9b43-5521-46f3-9c79-9612e6edffa5
    Harvest Source Id 1017486a-47c7-4139-9ed4-a4d93503679a
    Harvest Source Title OpenTopography CSW
    Licence
    Metadata Language en
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-104.767826868, 31.9866605594], [-104.755484531, 31.9866605594], [-104.755484531, 31.9981715327], [-104.767826868, 31.9981715327], [-104.767826868, 31.9866605594]]]}
    Progress
    Spatial Data Service Type
    Spatial Reference System NAD83(2011) / UTM zone 13N [EPSG: 6342]
    Spatial Harvester True

    Didn't find what you're looking for? Suggest a dataset here.