eesur/README.md

## README.md

      
    Raw
  

              README.md
            
          
    Hexagonal world map, that draws based hexagons on the generated canvas map (comment out display: hidden, in css, to see the canvas rendering)
Reference sources:

Rendering a map as canvas
Hexbin Heightmap based from Heightmap


## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>
    body {
        background: #000;
    }
    canvas {
      display: none;
    }
</style>
<!-- http://www.basscss.com/ -->
<link href="//npmcdn.com/basscss@8.0.1/css/basscss.min.css" rel="stylesheet">
<!-- http://clrs.cc/ -->
<link href="//s3-us-west-2.amazonaws.com/colors-css/2.2.0/colors.min.css" rel="stylesheet">

<section id="vis"></section>

<!-- dependencies -->
<script src="//d3js.org/d3.v3.min.js" charset="utf-8"></script>
<script src="//rawgit.com/mbostock/7833311/raw/27d0f5623105fd8815e1a42b80cbd4d27d292d53/d3.hexbin.min.js"></script>
<script src="//d3js.org/topojson.v1.min.js"></script>
<script src="//d3js.org/d3.geo.projection.v0.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/4.6.1/lodash.min.js" charset="utf-8"></script>
<!-- d3 code -->
<script src="script-compiled.js" charset="utf-8"></script>

<script>
    // call chart
    let chart = hexmap();

    // apply chart to DOM
    d3.select('#vis')
       .call(chart);
</script>


## script-compiled.js
'use strict';

var hexmap = function hexmap() {

    //________________________________________________
    // GET/SET defaults
    //________________________________________________

    // private variables
    var svg = undefined;
    var dispatch = d3.dispatch('customHover');

    // getter setter defaults
    var opts = {
        width: 960,
        height: 500,
        margin: { top: 20, right: 10, bottom: 20, left: 10 }
    };

    var hexbin = d3.hexbin().size([opts.width, opts.height]).radius(5);

    var color = d3.scale.linear().domain([14, 15, 35, 132]).range(['#000', '#bae4b3', '#74c476', '#238b45']).interpolate(d3.interpolateHcl);

    //________________________________________________
    // RENDER
    //________________________________________________

    function exports(_selection) {

        var canvas = _selection.append('canvas').attr('width', opts.width).attr('height', opts.height).attr('id', 'mapCanvas');

        var context = canvas.node().getContext('2d');
        var points = [];
        var hexagons = [];

        var projection = d3.geo.wagner7().rotate([0, 0]).scale(180).center([0, 0]);

        context.fillStyle = 'tomato';
        context.strokeStyle = 'none';

        var path = d3.geo.path().projection(projection).context(context);

        d3.json('world-110m.json', function (error, world) {
            if (error) throw error;
            path(topojson.feature(world, world.objects.land));
            context.fill();

            // use the canvas as the image
            var image = document.getElementById('mapCanvas');;

            context.drawImage(image, 0, 0, opts.width, opts.height);
            image = context.getImageData(0, 0, opts.width, opts.height);

            // rescale the colors
            for (var c, i = 0, n = opts.width * opts.height * 4, d = image.data; i < n; i += 4) {
                points.push([i / 4 % opts.width, Math.floor(i / 4 / opts.width), d[i]]);
            }

            hexagons = hexbin(points);
            hexagons.forEach(function (d) {
                d.mean = d3.mean(d, function (p) {
                    return p[2];
                });
            });

            var svg = _selection.append('svg').attr('width', opts.width).attr('height', opts.height);

            var hexagon = svg.append('g').attr('class', 'hexagons').selectAll('path').data(hexagons).enter().append('path').attr('d', hexbin.hexagon(4.5)).attr('transform', function (d) {
                return 'translate(' + d.x + ',' + d.y + ')';
            }).style('fill', function (d) {
                return color(d.mean);
            });
        });
    } // exports

    function getImage(path, callback) {
        var image = new Image();
        image.onload = function () {
            callback(image);
        };
        image.src = path;
    }

    //________________________________________________
    // GET/SET
    //________________________________________________

    function getSet(option, component) {
        return function (_) {
            if (!arguments.length) {
                return this[option];
            }

            this[option] = _;

            return component;
        };
    }

    // api for chart, all items in `opts` object made into get-set
    for (var key in opts) {
        exports[key] = getSet(key, exports).bind(opts);
    }

    d3.rebind(exports, dispatch, 'on');
    return exports;
};

## thumbnail.png

      
    Raw
  

              thumbnail.png
            
          
## world-110m.json

      
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              world-110m.json
            
          
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	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>
	body {
	background: #000;
	}
	canvas {
	display: none;
	}
	</style>
	<!-- http://www.basscss.com/ -->
	<link href="//npmcdn.com/basscss@8.0.1/css/basscss.min.css" rel="stylesheet">
	<!-- http://clrs.cc/ -->
	<link href="//s3-us-west-2.amazonaws.com/colors-css/2.2.0/colors.min.css" rel="stylesheet">

	<section id="vis"></section>

	<!-- dependencies -->
	<script src="//d3js.org/d3.v3.min.js" charset="utf-8"></script>
	<script src="//rawgit.com/mbostock/7833311/raw/27d0f5623105fd8815e1a42b80cbd4d27d292d53/d3.hexbin.min.js"></script>
	<script src="//d3js.org/topojson.v1.min.js"></script>
	<script src="//d3js.org/d3.geo.projection.v0.min.js"></script>
	<script src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/4.6.1/lodash.min.js" charset="utf-8"></script>
	<!-- d3 code -->
	<script src="script-compiled.js" charset="utf-8"></script>

	<script>
	// call chart
	let chart = hexmap();

	// apply chart to DOM
	d3.select('#vis')
	.call(chart);
	</script>
	'use strict';

	var hexmap = function hexmap() {

	//________________________________________________
	// GET/SET defaults
	//________________________________________________

	// private variables
	var svg = undefined;
	var dispatch = d3.dispatch('customHover');

	// getter setter defaults
	var opts = {
	width: 960,
	height: 500,
	margin: { top: 20, right: 10, bottom: 20, left: 10 }
	};

	var hexbin = d3.hexbin().size([opts.width, opts.height]).radius(5);

	var color = d3.scale.linear().domain([14, 15, 35, 132]).range(['#000', '#bae4b3', '#74c476', '#238b45']).interpolate(d3.interpolateHcl);

	//________________________________________________
	// RENDER
	//________________________________________________

	function exports(_selection) {

	var canvas = _selection.append('canvas').attr('width', opts.width).attr('height', opts.height).attr('id', 'mapCanvas');

	var context = canvas.node().getContext('2d');
	var points = [];
	var hexagons = [];

	var projection = d3.geo.wagner7().rotate([0, 0]).scale(180).center([0, 0]);

	context.fillStyle = 'tomato';
	context.strokeStyle = 'none';

	var path = d3.geo.path().projection(projection).context(context);

	d3.json('world-110m.json', function (error, world) {
	if (error) throw error;
	path(topojson.feature(world, world.objects.land));
	context.fill();

	// use the canvas as the image
	var image = document.getElementById('mapCanvas');;

	context.drawImage(image, 0, 0, opts.width, opts.height);
	image = context.getImageData(0, 0, opts.width, opts.height);

	// rescale the colors
	for (var c, i = 0, n = opts.width * opts.height * 4, d = image.data; i < n; i += 4) {
	points.push([i / 4 % opts.width, Math.floor(i / 4 / opts.width), d[i]]);
	}

	hexagons = hexbin(points);
	hexagons.forEach(function (d) {
	d.mean = d3.mean(d, function (p) {
	return p[2];
	});
	});

	var svg = _selection.append('svg').attr('width', opts.width).attr('height', opts.height);

	var hexagon = svg.append('g').attr('class', 'hexagons').selectAll('path').data(hexagons).enter().append('path').attr('d', hexbin.hexagon(4.5)).attr('transform', function (d) {
	return 'translate(' + d.x + ',' + d.y + ')';
	}).style('fill', function (d) {
	return color(d.mean);
	});
	});
	} // exports

	function getImage(path, callback) {
	var image = new Image();
	image.onload = function () {
	callback(image);
	};
	image.src = path;
	}

	//________________________________________________
	// GET/SET
	//________________________________________________

	function getSet(option, component) {
	return function (_) {
	if (!arguments.length) {
	return this[option];
	}

	this[option] = _;

	return component;
	};
	}

	// api for chart, all items in `opts` object made into get-set
	for (var key in opts) {
	exports[key] = getSet(key, exports).bind(opts);
	}

	d3.rebind(exports, dispatch, 'on');
	return exports;
	};