GML Data Import

When selecting a GML file for data import, choose Import as GML (Features). The import will load all instances of mapping relevant types found in the file, given they are derived from the GML AbstractFeatureType. The root element by default is ignored as it is assumed that it is a container element, e.g. a GML FeatureCollection.

If certain GML geometry types are encountered, additionally to reading the XML structure, geometry objects are created, which can be displayed in the map view and used for the mapping.

Currently supported are the following geometry types:

Currently not supported:

Load data from a WFS

HALE offers the possibility to load data based on a WFS GetFeature KVP request. You can specify the request URL manually or use the ... button to launch a wizard assisting you in building the URL from the service capabilities.

When determining the URL based on the service capabilities, you can specify the feature types to select from the server. Also, you can specify a bounding box for the features to request or specify a maximum number of features that should be returned by the server.

Troubleshooting loading GML data

If you get an error message that complains about a Spatial Reference System that is not known to the application, use the Additional CRS preference page (available through WindowSettings) to register the Well Known Text of the missing reference system. If you have issues with loading a GML file, please provide us with feedback on the issue.

Also please note that many existing WFS implementations have a few peculiarities regarding the support for KVP requests, specifically some WFS 2.0.0 implementations. If experiencing problems with a WFS 2.0.0 server, try using the same server via its WFS 1.1.0 interface.

What is an Instance?

Working with a source data set