Process Ring Polygons

During the import, CadnaA also can process ring polygons. A lower limit for the area (m²) which should be taken into account for the interior polygon can also be entered. Activate the respective options on the dialog File| Import|Options.

Ring polygons are areas which have "holes" inside the area. This may happen when in a GIS-system so-called "island" or "doughnut/donut" polygons have been drawn onto a larger area and subsequently been used as a cutting edge.