3.2.1. Data entry
There are basically two ways:
Data entry by constructing or digitizing in a TDH-project with the QGIS-tools itself
Data entry in an external program or software and then importing the position and/or technical data into TDH e.g.:
coordinates from manholes from measurement
position and/or technical data from another GIS or CAD system
using data from the surveyor (e.g. property boundaries) as a basis for defining catchment borders
other
Data entry in TDH needs some understanding of the underlying data model `SIA 405`_, but is supported with forms that link the different tables correctly together.
3.2.1.1. QGIS standard tools
To digitize th network elements, you need to work with the standard QGIS tools:
Select the layer you want to edit
Toggle Editing if necessary
Enable snapping if necessary
Choose the add feature tool