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Tuesday, August 24, 2021

How To Work Grid Maps - Purpose Two


Creating hexagon grid maps is real straightforward amongst Leaflet. What follows is a quick tutorial explaining how to exercise this expiry penalty Grid Map.

We tin flame brand a quick starting fourth dimension to the map past times next the Leaflet Choropleth Map tutorial. Once y'all bring the Leaflet Choropleth map, from the Leaflet tutorial, upward together with running all y'all bring to exercise is exercise the hexagon shaped polygons for the US states together with salvage it equally a GeoJSON file.

Again y'all tin flame cheat hither together with exactly pick out handgrip of the field polygon information from the CartoDB Bee Loss map. The information is provided inwards a table view amongst a slap-up niggling push to download the information equally a GeoJSON file. Download the information together with betoken your Leaflet Choropleth Map to your novel GeoJSON file instead of the 'states.js' file inwards the master copy tutorial map.

We don't desire the underlying map tile to seem on our map. So exactly delete the next business office of the html (which loads the map tiles):
L.tileLayer('http://{s}.tiles.mapbox.com/{id}/{z}/{x}/{y}.png', {     id: 'examples.map-20v6611k',     attribution: ... }).addTo(map);
Essentially that's all at that topographic point is to it.

However it would hold upward dainty to truly visualize unopen to information on our hexagon grid map. This is slow for a elementary true or false field map.

In my event Grid Map I've created a map which shows which states bring an enforceable expiry penalty. To exercise this I exactly created ii dissever GeoJSON files; i including the hexagon shaped polygons for states amongst the expiry penalization together with unopen to other amongst the polygons for the states without the expiry penalty. It is hence a elementary affair of applying a dissimilar means to each fix of polygons (green for states without the expiry penalization together with cerise for those states amongst the expiry penalty).

It is would besides hold upward dainty to add together labels to our polygons hence that the map's users tin flame easily run into which polygon represents each field on the map. To exercise this I used the leaflet-label plug-in. It is hence exactly a affair of creating a label at the pump of each polygon (to salvage doing this yourself y'all tin flame exactly re-create & glue the label variables from my event map).

That's it - y'all should straight off bring a elementary hexagon grid map of the United States, showing which states bring an enforceable expiry penalization statute together with which states don't.