Helper to write ecql filter. Retrieve all attributes from a layer.
Arguments
- layer
character; name of the WFS layer. Must correspond to a layer available on the IGN WFS service (seeget_layers_metadata()).
Helper to write ecql filter. Retrieve all attributes from a layer.
character; name of the WFS layer. Must correspond to a
layer available on the IGN WFS service (see get_layers_metadata()).