4.5.9.7. CityGML general¶

Note

These preference settings only apply to CityGML exports.

../../_images/impexp_export_preferences_citygml_general_fig.png

Fig. 4.47 Export preferences – General CityGML options.

The general CityGML export options allow you to enable pretty printing for the output file. When enabled (default), indentation is used for the XML document and every XML element is put on a new line. Without pretty printing, the entire data is put on a single long line. The file size will be considerably smaller without pretty printing, but the content is difficult to visually comprehend. Pretty printing should therefore be disabled in case the file is mainly used in machine-to-machine communication.

If your database contains global appearances, you can choose to convert them into local appearances during export. Global appearances are stored as <appearanceMember> properties of the <CityModel> root element in the output file. They typically affect more than one city object and, thus, are not stored as property of a single city object. When enabling this option, the export operation dissolves the global appearances and stores the appearance information as property of each city object to which it belongs (so-called local appearance). The CityGML specification recommends using local appearances whenever possible. This option does not change the contents in the database but only affects the structure of the output file(s).

Note

Global appearances are the only way to assign textures or materials to implicit geometries that are used by multiple city objects. Thus, global appearances of implicit geometries are not dissolved when enabling this option.