automatic terrain extraction
Automatic Terrain Extraction (ATE) is the process of generating elevation data—typically in the form of a Digital Surface Model (DSM) or Digital Terrain Model (DTM)—automatically from stereo imagery or photogrammetry datasets. It’s a crucial step in 3D mapping and analysis, especially in geospatial applications like topographic mapping, flood modeling, and urban planning. Thinkaerial leverages ATE technology to deliver highly accurate terrain models that support smarter planning, analysis, and decision-making.
A glimpse into our Automatic Terrain Extraction showcase.
Automatic Terrain Extraction (ATE) is the process of automatically generating elevation data—such as Digital Surface Models (DSM) or Digital Terrain Models (DTM)—from stereo imagery or photogrammetry datasets. It plays a vital role in 3D mapping and geospatial analysis, enabling accurate representation of the Earth’s surface for applications like topographic mapping, flood modeling, and infrastructure planning. At Thinkaerial, we harness the power of ATE to deliver precise, high-resolution terrain models that streamline analysis and support data-driven decision-making.
Thinkaerial Automatic Terrain Extraction Process
Data Acquisition
Capture high-resolution aerial or drone imagery with proper overlap.
Collect GPS/IMU data for accurate georeferencing.
Pre-Processing
Calibrate images using camera parameters.
Align images and generate tie points.
Import Ground Control Points (GCPs) if available.
Stereo Matching
Automatically detect corresponding features in overlapping images.
Use advanced algorithms (e.g., Semi-Global Matching) to compute depth.
Elevation Model Generation
Create Digital Surface Model (DSM) including all features.
Filter DSM to produce Digital Terrain Model (DTM) representing bare earth.
Quality Control
Check for noise, holes, or inconsistencies in the models.
Apply cleanup, filtering, or manual edits if necessary.
Export & Delivery
Export final DSM/DTM in formats like GeoTIFF, DEM, or LAS.
Deliver terrain models ready for use in GIS and CAD platforms.
