Not finding points. Always returning empty arry.

[atomless]

Hi,

I've added a geoJSON layer to a leafletjs map by passing this json file ( http://labs.jamestindall.info/rhumb_lines/tracks.json )
to the L.geoJson method and this successfully generates the desired polylines.

However, when I then pass a L.LatLng to leaflet-knn like so :

var knn_index = leafletKnn(geoJSON_layer);
var nearest = knn_index.nearest( latlng, 5, 10 );

nearest is always an empty array no matter how high I set the max_distance threshold. Any ideas what might be going wrong here?

[tmcw]

Can't really tell without context - can you link to an online example?

[atomless]

Sure, here's the quick test/demo : http://labs.jamestindall.info/rhumb_lines/ and the js file is at : http://labs.jamestindall.info/rhumb_lines/js/main-using-leaflet.js (see function findClosestTrackPoint at line 83)

[tmcw]

Hmm, this code has the bit using leaflet-knn disabled/commented out in initialization, and unused anywhere else.

[atomless]

Sorry to have taken up your time Tom, I was on a deadline and had to drop leaflet-knn in favour of using the leaflet.geometryutil plugin.

[tmcw]

Reopening to find the core issue.

[tmcw]

Ah, initialization flow was likely wrong. Closing; this was in the app.

[atomless]

Interesting. What had I done wrong?

[tmcw]

The example was using polylines; this library deals in markers only.

[atomless]

Thanks again for taking a look Tom. Though that really needs to be stated more clearly in the documentation. I followed the example and passed in GeoJSON. There should be very little difference whether the GeoJSON features are drawn as points/markers or as lines or polygons the method of calculating the nearest neighbour should be the same.