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.

    Steep Headwater-Colluvial Channels, Day Creek, San Gabriel Mountains CA, US

    Metadata Updated: May 15, 2021

    Dataset includes UAV structure-from-motion derived point cloud of steep headwater channels, cliffs, and hillslopes in the headwaters of Day Creek, San Gabriel Mountains, CA (survey conducted in August, 2018). Model spans ~500 x 500 m and was georeferenced to airborne lidar dataset using iterative-closest-point-alignment. Approximate point density of 225 pts/m2.

    Bare-earth airborne lidar dataset was used as reference cloud (https://doi.org/10.5069/G9J38QPM). No vegetation filtering or clipping was performed on SfM derived point cloud. M3C2 cloud-to-cloud difference with default parameters yields 1-sigma cloud-to-cloud difference of 0.21 m and 2-sigma cloud-to-cloud difference of 0.78 m.

    Accuracy is likely not sufficient for change detection analysis but is sufficient for morphometric analysis (channel geometries, sediment grain size, spatial patterns of soil/colluvial sediment cover).

    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 11, 2021
    Metadata Created Date May 15, 2021
    Metadata Updated Date May 15, 2021
    Reference Date(s) May 11, 2021 (publication)
    Frequency Of Update

    Metadata Source

    Harvested from OpenTopography CSW

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date May 11, 2021
    Metadata Created Date May 15, 2021
    Metadata Updated Date May 15, 2021
    Reference Date(s) May 11, 2021 (publication)
    Responsible Party Roman DiBiase (Originator); Evan Greenberg (Originator); Julia Carr (Originator); OpenTopography (Originator); Joanmarie Del Vecchio (Originator); Alexander Neely (Originator)
    Contact Email
    Guid OTDS.052021.26911.1
    Access Constraints
    Bbox East Long -117.568455229014
    Bbox North Lat 34.2273531974755
    Bbox South Lat 34.2223742891119
    Bbox West Long -117.57498552604
    Coupled Resource
    Frequency Of Update
    Harvest Object Id 7cd2fbff-aadd-4b06-b240-341966284cad
    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": [[[-117.574985526, 34.2223742891], [-117.568455229, 34.2223742891], [-117.568455229, 34.2273531975], [-117.574985526, 34.2273531975], [-117.574985526, 34.2223742891]]]}
    Progress
    Spatial Data Service Type
    Spatial Reference System NAD83 / UTM zone 11N [EPSG: 26911]
    Spatial Harvester True

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