Topo features a series of CAD tools that enables processing of digital landscape, cross-sections and contour lines for land survey works.
Topo comes as an AutoCAD add-on and it is not designed to function as self standing software.
Please note that VBA runtime libraries are required by this add-on, therefore an AutoCAD LT version is not adequate for installing and running this add-on.

Some of the Topo's key routines include:
- Draw a scaled grid for plan plotting
- Import points from ASCII (simple text) 3D coordinate file
- Export coordinates to ASCII in Cartesian or polar coordinate system
- Form the Triangular Irregular Network (TIN) of a survey site
- Manual handling and correction tools for TIN elements
- Produce analytical area calculations and draw calculation formulas on drawing
- Produce a cross section of the landscape
- Produce contour lines of the site

Also includes a series of useful CAD tools:
- Scaling tools for raster images and 3D objects
- A series of text manipulation tools
- Distance measurement tool
- 3D object manipulation

Future work on this project will allow an advanced version that allows:
- Volume measurements
- Road design