Get features inside a polygon from a WMS Layer in OpenLayers

Question

I currently implemented this example. So I can select layer's features with a single click or box selection.

But I want to know is it possible to get features with box selection on a wms layer?

(i tried with vector layer and it's currently working).

Thanks.

Please add some information about what exactly you need, what you have done already. what do you mean "all feature inside polygon"? — Mahdi Mahmoodian, Jan 07 '20 at 10:56
it simple , means all feature in my layer . u can see example if u need https://openlayers.org/en/latest/examples/box-selection.html — sep7696, Jan 07 '20 at 11:02
Do you want to select features of a layer inside a box like the example you mentioned? and the only difference is the using layer? wms layer instead of vector layer? — Mahdi Mahmoodian, Jan 07 '20 at 11:06

score 0 · Answer 1 · answered Jan 07 '20 at 11:33

There are several ways of loading a layer as WMS.

WMS can be used as a Tile layer, as shown here, or as an Image layer.

In both ways, the webserver(GeoServer) sends a tile/image to the client. The example you mentioned uses Vector Layer, which means server send features one by one, not an image or a tile. So you can't check the "box selection extent" and features to find Intersections.

But there is another thing that can help a bit. GetFeatureInfo is a solution to get features from a WMS layer. it gets a single coordinate (a click) and some other information, then return feature of that coordinate.

So answering your question. No, it's not possible to box selecting but you can get a feature by a single click.

here is the example.

Get features inside a polygon from a WMS Layer in OpenLayers

1 Answers1