I have online access to a leaflet map, but cannot reach the authors. Is there a way to download shapes from this map (to shp, geojson, etc.)?
I thought of running some leaflet-related javascript code in browser console, but I couldn’t find any relevant commands in the documentation.
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Answer
When you look into the dev tools of the link you posted, what you’ll find is that the shapes you see there are actually part of a raster tile layer:
Looking into the source code (sources tab), you can see that they’re added with this code:
L.TileLayer.Codes = L.TileLayer.extend({ getTileUrl: function(coords) { return "http://mapa-kodow-pocztowych.pl/tiles/" + ((coords.x + 10 * coords.y) % 100) + '/' + coords.z + '-' + coords.x + '-' + coords.y + '.png'; }, getAttribution: function() { return 'Code Map © RoboLabs, <a href ="mailto:admi' + 'n@mapa-kodow-pocztow' + 'ych.pl">email</a>'; } });
Looks like those tiles are being served by the same server that’s serving the webpage. Again in the sources tab:
This means there’s no good way to know where the data from these tiles came from, or trace them back to their original shapefile sources (as far as I can tell). Sorry. You’d have to contact the page author and ask them for their source data.