Draw Hexagon based on zip code in google map?

Question

I want to draw Hexagon polygon on google map based on zip code (single lat, long). How can I get other lat long so I can pass it to polygon array based on single lat long, It would be also based on any radius e.g. 15 miles or 15 km.

Here is sample google map image.

Answer 1

One option is to use code from Mike Williams' eshapes ported to v3.

proof of concept fiddle

from his documentation for a RegularPoly:

Plots a regular polygon (e.g. pentagon, square, octagon) with a specified centre, radius, number of vertices, and rotation.

Parameters

• latlng Centre of the shape
• radius Length of radius in metres
• vertexCount Number of vertices, e.g. 5 for a pentagon
• rotation Degrees of rotation. When zero or omitted the southern edge of the shape is horizontal
• color Color parameter for polyline
• weight Weight parameter for polyline
• opacity Opacity parameter for polyline
• opts Options parameter for polyline

code snippet:

var geocoder = new google.maps.Geocoder();
var map;

function initialize() {
  map = new google.maps.Map(
    document.getElementById("map_canvas"), {
      center: new google.maps.LatLng(37.4419, -122.1419),
      zoom: 10,
      mapTypeId: google.maps.MapTypeId.ROADMAP
    });

  codeAddress("Atlanta, GA");
}

function codeAddress(address) {
  geocoder.geocode({
    'address': address
  }, function(results, status) {
    if (status == google.maps.GeocoderStatus.OK) {
      map.setCenter(results[0].geometry.location);
      // === Hexagon ===
      var point = results[0].geometry.location;
      var hex1 = google.maps.Polygon.RegularPoly(point, 25000, 6, 60, "#000000", 1, 1, "#ff0000", 0.5);
      hex1.setMap(map);
    } else {
      alert("Geocode was not successful for the following reason: " + status);
    }
  });
}

google.maps.event.addDomListener(window, "load", initialize);

// original code from Mike Williams' eshapes.js
// http://econym.org.uk/gmap/eshapes.htm
// ported to the Google Maps Javascript API v3
google.maps.Polygon.RegularPoly = function(point, radius, vertexCount, rotation, strokeColour, strokeWeight, Strokepacity, fillColour, fillOpacity, opts) {
  rotation = rotation || 0;
  var tilt = !(vertexCount & 1);
  return google.maps.Polygon.Shape(point, radius, radius, radius, radius, rotation, vertexCount, strokeColour, strokeWeight, Strokepacity, fillColour, fillOpacity, opts, tilt)
}
google.maps.Polygon.Shape = function(point, r1, r2, r3, r4, rotation, vertexCount, strokeColour, strokeWeight, Strokepacity, fillColour, fillOpacity, opts, tilt) {
  var rot = -rotation * Math.PI / 180;
  var points = [];
  var latConv = google.maps.geometry.spherical.computeDistanceBetween(point, new google.maps.LatLng(point.lat() + 0.1, point.lng())) * 10;
  var lngConv = google.maps.geometry.spherical.computeDistanceBetween(point, new google.maps.LatLng(point.lat(), point.lng() + 0.1)) * 10;
  var step = (360 / vertexCount) || 10;

  var flop = -1;
  if (tilt) {
    var I1 = 180 / vertexCount;
  } else {
    var I1 = 0;
  }
  for (var i = I1; i <= 360.001 + I1; i += step) {
    var r1a = flop ? r1 : r3;
    var r2a = flop ? r2 : r4;
    flop = -1 - flop;
    var y = r1a * Math.cos(i * Math.PI / 180);
    var x = r2a * Math.sin(i * Math.PI / 180);
    var lng = (x * Math.cos(rot) - y * Math.sin(rot)) / lngConv;
    var lat = (y * Math.cos(rot) + x * Math.sin(rot)) / latConv;

    points.push(new google.maps.LatLng(point.lat() + lat, point.lng() + lng));
  }
  return (new google.maps.Polygon({
    paths: points,
    strokeColor: strokeColour,
    strokeWeight: strokeWeight,
    strokeOpacity: Strokepacity,
    fillColor: fillColour,
    fillOpacity: fillOpacity
  }))
}

function EOffset(point, easting, northing) {
  var latConv = google.maps.geometry.spherical.computeDistanceBetween(point, new google.maps.LatLng(point.lat() + 0.1, point.lng())) * 10;
  var lngConv = google.maps.geometry.spherical.computeDistanceBetween(point, new google.maps.LatLng(point.lat(), point.lng() + 0.1)) * 10;
  return new google.maps.LatLng(point.lat() + northing / latConv, point.lng() + easting / lngConv)
}

function EOffsetBearing(point, dist, bearing) {
  var latConv = google.maps.geometry.spherical.computeDistanceBetween(point, new google.maps.LatLng(point.lat() + 0.1, point.lng())) * 10;
  var lngConv = google.maps.geometry.spherical.computeDistanceBetween(point, new google.maps.LatLng(point.lat(), point.lng() + 0.1)) * 10;
  var lat = dist * Math.cos(bearing * Math.PI / 180) / latConv;
  var lng = dist * Math.sin(bearing * Math.PI / 180) / lngConv;
  return new google.maps.LatLng(point.lat() + lat, point.lng() + lng)
}

html,
body,
#map_canvas {
  height: 500px;
  width: 500px;
  margin: 0px;
  padding: 0px
}

<script src="https://maps.googleapis.com/maps/api/js?libraries=geometry&key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk"></script>
<div id="map_canvas" style="border: 2px solid #3872ac;"></div>