fixed radius

Hi,

I’d like my heat point around lat/lng to have a fixed (zoom independent) radius of 500m : how can I specify this ?

Thank you

[bobintornado]

Having a similar but not exactly the same issue here. Because I am not sure about how to recalculate the radius of each feature on each zoom, I implement this by removing old layers and add back new layers on each zoom. Something like

map.on('zoomend', function() {
    // remove existing layer
    map.removeLayer(old_layer);
    // add in new
    new_layer = L.geoJson(data, data_options);
    map.addLayer(new_layer);
});

and in my data_options, I implemented the resizing method

var data_options = {
    pointToLayer: function(feature, latlng) {
        mk = L.circleMarker(latlng);

        var pointC = map.latLngToContainerPoint(latlng);
        var pointX = [pointC.x + 1, pointC.y];

        // convert containerpoints to latlng's
        var latLngC = map.containerPointToLatLng(pointC);
        var latLngX = map.containerPointToLatLng(pointX);

       // Assuming distance only depends on latitude 
        var distanceX = latLngC.distanceTo(latLngX);
      // 100 meters is the fixed distance here
        var pixels = 100 / distanceX;
        mk.setRadius(pixels);

        return mk;
    }
};

Hope this helps! I refer to http://stackoverflow.com/questions/27545098/leaflet-calculating-meters-per-pixel-at-zoom-level when I implemented method for calculating meters per pixel at different zoom levels.

[cpunekar]

Thanks @kuzvac for the reply. I wanted to have fixed radius when I asked this question but now since the intensity value of points get added as we zoom out, I was curious if we can recalculate the radius each time we zoom in and out. As in I want the radius to increase when we zoom in and to decrease when we zoom out. This would give me a better picture of the intensity values as I am not looking for density heatmap.