Workflow Overview
Our process starts with high-resolution drone photogrammetry, capturing detailed elevation data across the site. We use VirtualSurveyor to process this data into accurate Digital Surface Models (DSM) and Digital Terrain Models (DTM). This allows us to clean terrain, define breaklines, generate custom contour intervals, and isolate ground-level features. Cut/fill zones, slope classes, and drainage flowlines can be calculated directly from these models.

Mapping & Visualization
Once terrain data is cleaned and classified, we import it into QGIS to build final map products. QGIS allows us to apply color ramps for slope and elevation, generate hillshades, and overlay spatial context such as parcel boundaries, roads, or zoning layers. This step transforms raw terrain data into a visually readable, cartographically styled topographic map tailored to your project needs.

Deliverables & File Formats
We provide outputs in industry-standard formats depending on your workflow. These include:

• DXF/DWG for CAD platforms like AutoCAD Civil 3D
  
• SHP, GeoTIFF, and GeoPackage for GIS integration (ArcGIS, QGIS)
  
• PDF map sheets with contour labels, scale bars, legends, and north arrows
  Contour intervals can be customized (e.g., 0.5m, 1m, or 2m) based on site size and terrain variation.
  

Applications & Use Cases
This service is ideal for:

• Site grading and drainage planning
  
• Forestry and reforestation layout
  
• Road or trail alignment in variable terrain
  
• Pre-construction surface verification
  
• Planning subdivisions and utility corridors
  
• Environmental monitoring of slope stability or watershed zones
  

Accuracy & Limitations
Our topographic outputs are based on aerial photogrammetry and surface reconstruction techniques, not ground-based survey-grade LiDAR. While accurate enough for preliminary planning, cut/fill estimates, and concept design, they are not certified survey products. However, accuracy can be improved through the use of ground control points (GCPs) or RTK-based capture.