From field survey to automatic drawing

Geocoding allows field survey data to be converted automatically into a structured drawing. By assigning meaning to survey points during measurement, Pythagoras can interpret and draw objects correctly at import. This article explains how this conversion works at a conceptual level.

Measuring with meaning

A field survey contains more than coordinates. Each measured point also receives a code that describes what the point represents, such as a point object, a line, an arc or text. These codes determine how the survey data will be interpreted later.

By defining this information in the field, interpretation shifts from the drawing office to the survey itself.

The field data file

After surveying, a field data file is created. This file contains:

• coordinates

• point numbers

• survey codes

On its own, this is still raw data. Without interpretation, Pythagoras would only be able to display these as individual points.

The CDF file as translation layer

Interpretation is handled by the Code Description File (CDF).
This file defines:

• which object type is created for each code

• how points are connected

• which properties are assigned to objects

The CDF acts as the link between survey codes and drawing objects.

The library for visual representation

In addition to the CDF, Pythagoras uses a library file (LIB).
This library contains the graphical elements used in the drawing, such as symbols and line styles. The CDF can reference these elements so that objects are displayed correctly from the start.

What happens during import?

During import, Pythagoras:

• reads the survey data

• interprets the codes via the CDF

• applies the library for visual output

This happens in a single process. No separate drawing step is required to turn survey points into a usable drawing.

The result

After import, you obtain:

• logically structured objects

• consistent properties

• a drawing that is immediately usable

The level of automation depends on the survey codes used, the structure of the CDF and the selected library.

The transition from field survey to automatic drawing is the result of a clear division of roles:

• the field survey provides data with meaning

• the CDF defines interpretation

• the library controls visual appearance

Together, they transform raw survey data into a structured drawing.