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JavaScript: Convert GeoJSON to WKT I
Raw
index.html
<!DOCTYPE html>
<html>
<head>
<link type="text/css" rel="stylesheet" href="stylesheet.css"/>
<title>Convert GeoJSON</title>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script src="route.js"></script>
</head>
<body>
<h1>Convert <a href="http://geojson.org/geojson-spec.html#appendix-a-geometry-examples">GeoJSON-LineString</a> to <a href="http://en.wikipedia.org/wiki/Well-known_text">WKT-LINESTRING</a></h1>
<div class='block'>
<div>
<h1>Input: GeoJSON</h1>
<textarea id="geojson-input" placeholder="Paste GeoJSON here"></textarea>
<p class = 'convert' id='convert'>Convert</p>
</div>
</div>
<div class='block'>
<div>
<h1>Output: GeoJSON</h1>
<textarea id="geojson-output" placeholder="Resulting WKT will be displayed here"></textarea>
<p class = 'convert' id='revert'>Convert</p>
</div>
</div>
</body>
<script>
d3.select('#convert').on('mouseup',function(){convert();})
d3.select('#revert').on('mouseup',function(){revert();})
//initialise input of textarea
d3.select('#geojson-input').text(JSON.stringify(LineString, null, 4));
function convert(){
console.log('hey')
//initialize json-textarea-input
var input = $('#geojson-input').val();
//get the input as json-object
var input_json = JSON.parse(input);
//console.log(input_json)
//convert the json-input to WKT
var wkt_str = 'LINESTRING(';
input_json.coordinates.forEach(function(p,i){
// console.log(p)
if(i<input_json.coordinates.length-1)wkt_str = wkt_str + p[0] + ' ' + p[1] + ', ';
else wkt_str = wkt_str + p[0] + ' ' + p[1] + ')';
})
//console.log(wkt_str)
//fill the resulting WKT-Linestring to output textarea
d3.select('#geojson-output').text(wkt_str);
}
function revert(){
console.log('hu')
//initialize wkt-textarea-input
var input2 = $('#geojson-output').val();
var input_cache = input2.replace('LINESTRING(','');
input_cache = input_cache.replace(')','');
var input_array = input_cache.split(',')
var output_json = {"type":"LineString", "coordinates":[]}
input_array.forEach(function (p,i){
if(i==0) var p_cache = p;
else var p_cache = p.slice(1,p.length);
var p_array = p_cache.split(' ');
output_json.coordinates.push([Number(p_array[0]), Number(p_array[1])])
})
var json_str = JSON.stringify(output_json, null, 4)
d3.select('#geojson-input').text(json_str);
}
</script>
</html>
Raw
route.js
var LineString = {
"type": "LineString",
"coordinates": [
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2.32986,
48.86005
],
[
2.35093,
48.863411
],
[
2.43115,
48.940418
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],
[
2.77004,
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],
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],
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],
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],
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],
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],
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],
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],
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