Skip to content

Instantly share code, notes, and snippets.

@k9
Last active August 2, 2016 21:37
Show Gist options
  • Star 0 You must be signed in to star a gist
  • Fork 0 You must be signed in to fork a gist
  • Save k9/fade39db6b0d475ee1d6f6bcf1ee2ac9 to your computer and use it in GitHub Desktop.
Save k9/fade39db6b0d475ee1d6f6bcf1ee2ac9 to your computer and use it in GitHub Desktop.
Satellite Projection Test
license: gpl-3.0
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.graticule {
fill: none;
stroke: #777;
}
.country {
fill: #e8eee8;
stroke: #fff;
stroke-width: 2px;
}
.river {
fill: none;
stroke: #aac;
stroke-width: 0.5px;
}
.lake {
fill: #aac;
}
</style>
<body>
<script src='https://cdnjs.cloudflare.com/ajax/libs/d3/4.2.0/d3.min.js'></script>
<script src='https://d3js.org/topojson.v1.min.js'></script>
<script src='https://d3js.org/d3-geo-projection.v1.min.js'></script>
<script>
var width = 960,
height = 480
var latitude = 0,
longitude = 0
var mouseInteraction = false
var distance = 2.0
var projection = d3.geoSatellite()
.distance(distance)
.scale(450)
.clipAngle(Math.acos(1 / distance) * 180 / Math.PI - 1e-6)
.precision(.1);
var path = d3.geoPath()
.projection(projection);
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height)
.on("mouseover", function () { mouseInteraction = true })
.on("mouseout", function () { mouseInteraction = false })
d3.json("vectors.json", function(error, vectors) {
if (error) throw error;
var countries = topojson.feature(vectors, vectors.objects.countries)
var rivers = topojson.feature(vectors, vectors.objects.rivers)
var lakes = topojson.feature(vectors, vectors.objects.lakes)
var countryPaths = this.svg.selectAll('.country')
.data(countries.features)
.enter().insert('path')
.attr('class', 'country')
.attr('d', path);
var riverPaths = this.svg.selectAll('.river')
.data(rivers.features)
.enter().insert('path')
.attr('class', 'river')
.attr('d', path);
var lakePaths = this.svg.selectAll('.lake')
.data(lakes.features)
.enter().insert('path')
.attr('class', 'lake')
.attr('d', path);
svg.on('mousemove', function() {
var position = d3.mouse(this)
latitude = 90 - (position[1] / 480 * 180)
longitude = position[0] / 960 * 360
})
function render () {
if (!mouseInteraction) {
longitude += 1
}
projection.rotate([longitude, latitude, 0])
countryPaths.attr('d', path)
riverPaths.attr('d', path)
lakePaths.attr('d', path)
window.requestAnimationFrame(render)
}
render()
});
d3.select(self.frameElement).style("height", height + "px");
</script>
Display the source blob
Display the rendered blob
Raw
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment