Measurements can also be collected using standard running dimensions
supplemented with polar cylindrical coordinates established using a radially
calibrated plane-table (image 343k),
supplied with the software. Distances can be collected using a steel tape
or the DISTO visible laser (image 343k)
device marketed by Leica.
Existing CAD drawings and/or databases can be processed into linked models with a minimum of effort even if they were created on incompatible systems. This is done by extracting drawing intelligence directly from the .DWG or .DXF file into the database and regenerating the drawing using CART.
Paper drawings can be scanned and processed using Autocad and Tern-OVLY, with the CART data entry add-on. Instead of drawing lines over the raster image individual points are identified and linked to an object name to create a CART database from which the model can be generated.
Photographs can be processed in the same way using the ASR
rectification program, to create scaled photographs from which a CART
database can be created using the interface provided by ASR.