mbostock/.block

## .block
license: gpl-3.0

## README.md

      
        

                
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              README.md
            
          
        
      
      
    Figure 37.—Tilted Perspective projection. Eastern seaboard viewed from a point about 160 km above Newburg, N.Y. Parameters using symbols in text: φ₁ = 41º 30′ N. lat, λ₀ = 74º 00′ W. long., ω = 55º, γ = 210º, P = 1.025. 1º graticule.

  

  

## readme.png

      
        

                
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              readme.png
            
          
        
      
    
    

        
            
        
    

  

## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>

body {
  margin: auto;
  padding: 10px;
  width: 537px;
}

svg {
  background: url(readme.png) no-repeat;
  border: solid 1px #000;
}

.graticule {
  fill: none;
  stroke: red;
}

</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script src="//d3js.org/d3.geo.projection.v0.min.js"></script>
<script>

var width = 537,
    height = 737;

var projection = d3.geo.satellite()
    .distance(1.025)
    .scale(38800)
    .rotate([74, -41.5, 212])
    .tilt(55);

// The reference 74ºW, 41ºN is at 181px, 710px.
var offset = projection.translate([-181, -710])([-74, 41]);
projection.translate([-offset[0], -offset[1]]);

var graticule = d3.geo.graticule()
    .extent([[-74 - 15, 41 - 15], [-74 + 1e-6, 41 + 1e-6]])
    .step([1, 1]);

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

var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height);

svg.append("path")
    .datum(graticule)
    .attr("class", "graticule")
    .attr("d", path);

d3.select(self.frameElement).style("height", height + 20 + "px");

</script>

## thumbnail.png

      
        

                
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              thumbnail.png
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>

	body {
	margin: auto;
	padding: 10px;
	width: 537px;
	}

	svg {
	background: url(readme.png) no-repeat;
	border: solid 1px #000;
	}

	.graticule {
	fill: none;
	stroke: red;
	}

	</style>
	<body>
	<script src="//d3js.org/d3.v3.min.js"></script>
	<script src="//d3js.org/d3.geo.projection.v0.min.js"></script>
	<script>

	var width = 537,
	height = 737;

	var projection = d3.geo.satellite()
	.distance(1.025)
	.scale(38800)
	.rotate([74, -41.5, 212])
	.tilt(55);

	// The reference 74ºW, 41ºN is at 181px, 710px.
	var offset = projection.translate([-181, -710])([-74, 41]);
	projection.translate([-offset[0], -offset[1]]);

	var graticule = d3.geo.graticule()
	.extent([[-74 - 15, 41 - 15], [-74 + 1e-6, 41 + 1e-6]])
	.step([1, 1]);

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

	var svg = d3.select("body").append("svg")
	.attr("width", width)
	.attr("height", height);

	svg.append("path")
	.datum(graticule)
	.attr("class", "graticule")
	.attr("d", path);

	d3.select(self.frameElement).style("height", height + 20 + "px");

	</script>