OT Blog

Information and discussion related to high-resolution lidar topography for the Earth sciences

LINZ tutorial: From points to pixels — creating digital elevation models from OpenTopography point clouds

OpenTopography is collaborating with Land Information New Zealand to make 3D point cloud lidar data in New Zealand available for download, processing, and visualization. LIdar-derived DEM and DSM raster products are available for download via the LINZ Data Service.  LINZ recently published another nice tutorial on how to use OpenTopography tools to produce custom raster terrain products (i.e., DEMs, DTMs, and DSMs) from LINZ point cloud data.

Topographic Differencing Showcase

OpenTopography recently released on-demand vertical differencing. Here, we showcase a range of anthropogenic, geomorphic, and tectonic processes imaged using topographic differencing on OpenTopography’s portal. In each image, erosion or downward change of the Earth’s surface is colored in red, while deposition or upward change is colored in blue. We include a link to the change detection page for each dataset pair so you can run your own jobs and explore.

TauDEM processing on OpenTopography

Topographic rasters produced from OpenTopography's high-resolution point clouds can be used in tandem with TauDEM, an open source analysis toolkit by Dr. David Tarboton at Utah State University, to extract hydrologic information from topography. TauDEM can perform calculations such as flow direction and area contributing to a point within the hydrologic network.

OpenTopography: 2015 in Review Infographic

OpenTopography had a big year in 2015, and we continue to see exponential growth in number of users and jobs run to access and process data in 2015. We compiled metrics from the past year into this infographic to summarize OpenTopography use in 2015.

We look forward to another year of growth in users and available data in 2016!