CHANGE DETECTION
STREAM compares two terrain surveys and reports what changed — where material was added or removed, the net volume with an uncertainty band, and only the change that is statistically significant. Ideal for tracking mining, earthworks and erosion over time.
Change detection measures the difference between two elevation surfaces captured at different times. Beyond a raw difference map, a rigorous result reports volume with an uncertainty band and filters out change smaller than the survey noise.
STREAM uses a level-of-detection threshold (LoD) and optional co-registration to correct systematic shift between the two datasets, so the reported change is trustworthy.
See where material was added (deposition) and removed (erosion) as a clear color map between two scenarios.
Get net cut/fill volume with an uncertainty band, not just a single unqualified number.
Choose a confidence level so only change larger than the survey noise is kept as significant.
Correct systematic vertical shift between datasets, and export a PDF report plus raster/vector change layers.
It compares two terrain scenarios and reports deposition, erosion and net volume with an uncertainty band, keeping only change above a level-of-detection threshold.
LoD is a confidence threshold: change smaller than the combined survey noise is filtered out, so only statistically significant change is reported.
Yes. Optional co-registration removes systematic vertical shift (and tilt) between the two datasets before computing change.
Free beta for Windows x64. Works fully offline with GeoTIFF, LAS/LAZ and DXF.
Download STREAM free