Spatial Search-Filtering by an arbitrary rectangle

[AppWerft]

Hi,

we have a heatmap with geo positions of pulications:

and try to filter:

https://lucene.apache.org/solr/guide/6_6/spatial-search.html#SpatialSearch-Filteringbyanarbitraryrectangle

Is there a way in this module?

[AppWerft]

I guess:

geofilter {
        id = geofilter
        type = Hidden
        query = geoLocationPoint:[%f,%f TO %f,%f]
}

But how I have to build the querystring?
&tx_find_find[q][geofilter]=????