ALOS World 3D - 30m (AW3D30) is a freely available, downsampled version of a high-resolution (5m) dataset collected by The Japan Aerospace Exploration Agency (JAXA). The ALOS World 3D - 30m dataset is a digital surface model derived from satellite-based stereo-photogrammetry. OpenTopography has updated its version of AW3D30 from version 1 (May 2015) to version 3.2 (January 2021).
OpenTopography has expanded our collection of global datasets to include the NASADEM, as well as the European Space Agency (ESA) Copernicus Digital Elevation Models (DEMs). This adds to OpenTopography's existing global datasets: NASA Shuttle Radar Topography Mission (SRTM) DEM, STRM15+, and the Japan Aerospace Exploration Agency (JAXA) Advanced Land Observing Satellite (ALOS) DEM.
OpenTopography is pleased to announce our new open-access publication in Geosphere about our on-demand differencing tools: "Measuring change at Earth’s surface: On-demand vertical and three- dimensional topographic differencing implemented in OpenTopography."
OpenTopography is pleased to announce the release of a new lidar dataset covering approximately 74 km2 covering the Illilouette Creek basin in Yosemite National Park, California. This dataset was collected for Dr. Sally Thompson at the University of California, Berkeley in order to assess the occurrence and characteristics of post-fire erosion gullies caused by the Empire Fire in the Illilouette Creek basin. Data were collected by NCALM, an NSF-funded center that supports the use of airborne laser mapping technology (a.k.a.
OpenTopography is seeking to hire a summer intern through the UNAVCO Student Internship Program (USIP)!
OpenTopography is pleased to announce the release of the SRTM15+ V2.1 global bathymetry and topography dataset. This dataset is the latest iteration of the SRTM+ digital elevation model (DEM) where the "plus" indicates the addition of ocean bathymetry from shipboard soundings and satellite-derived predicted depths. This DEM is a global elevation grid with a spatial sampling interval of 15 arc seconds (approximately 500 x 500 m pixel size at the equator).
OpenTopography is happy to announce the release of an on-demand canopy height model tool. Canopy height models are a measurement of the height of trees, buildings, and other structures above the ground topography. This product is used in a variety of forestry applications including tracking vegetation and trees in a forest over time, calculating biomass, and estimating leaf area index.
OpenTopography invites you to join us for a one hour live webinar on Monday January 11 at 2-3 EST/11-12 PST on topographic differencing. Learn about vertical and 3D topographic differencing and perform differencing on OpenTopography's web interface with one of 60 datasets pairs with differencing enabled.
A new Structure from Motion (SfM) dataset comprising well georeferenced, high-resolution topography and orthomosaics for part of the Lost River fault zone, Idaho has been released. The dataset was collected by Dr. Michael Bunds and Christopher DuRoss from May 2015 - May 2016 and covers ~6.1 km of surface rupture from the the Mw 6.9 1983 Borah Peak Earthquake. Point clouds and digital surface models (DSMs) were generated from low-altitude aerial photographs using Structure-from-Motion and multi-view stereo processing.
New datasets are being continually added to the USGS 3DEP Amazon Web Services (AWS) bucket. If you are a U.S. academic, you can gain access to this valuable dataset through OpenTopography! Since August 2020, the coverage has increased by an additional 175 datasets, or 4.4 trillion new lidar points.
