title: Create a polygon around each point in geojson from geojson
body: <p>Creating a map similar to the one found here:
  <a href="https://www.plantmaps.com/interactive-california-2012-usda-plant-zone-hardiness-map.php" rel="nofollow noreferrer">https://www.plantmaps.com/interactive-california-2012-usda-plant-zone-hardiness-map.php</a></p>
  
  <p>Have all the data needed.
  Create polygons around each one without distance inbetween. No overlapping or similar.</p>
  
  <p>Drawing it all by hand on geojson.io, seems impossible.</p>