DIGITAL ELEVATION MODEL
STREAM is a high-performance desktop DEM viewer and analysis tool. It streams gigabyte-scale digital elevation models straight from GeoTIFF, so you can pan, zoom and measure across a whole survey without waiting for the file to load — and turn the elevation surface into real engineering results.
A Digital Elevation Model (DEM) is a raster grid where each cell stores a ground elevation. It is the base layer for almost every terrain workflow — volumes, cross-sections, slope, hydrology and contours are all derived from it.
A DEM (bare-earth) is often distinguished from a DSM (Digital Surface Model, which includes buildings and vegetation) and a DTM (Digital Terrain Model). STREAM opens all of them and computes on the elevation surface directly.
Out-of-core streaming loads only the area you are looking at in full detail, so hundreds of MB — even GB — of DEM open without lag.
A Vulkan compute raycaster renders the elevation surface in 2D and 3D at full resolution, with shaded relief and color ramps.
Distance, area, elevation, cut/fill volume, cross-sections and stockpiles are all measured directly from the DEM surface.
Run slope, aspect, viewshed, hydrology, contour and sun & shadow analysis on the DEM and save the results as raster or vector.
STREAM opens GeoTIFF elevation rasters, ESRI ASCII grids (.asc) and common DEM grids, and can rasterize LAS/LAZ point clouds into a DEM on import.
STREAM is built for gigabyte-scale DEMs. It streams data out-of-core and converts it to a fast internal format on first load, so large models stay responsive and reopen in seconds.
Yes. STREAM runs entirely on your computer; the DEM never leaves your machine and no internet connection is required.
Free beta for Windows x64. Works fully offline with GeoTIFF, LAS/LAZ and DXF.
Download STREAM free