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Merge pull request #2715 from elemoine/tissot

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Add an EPSG:3857 map to Tissot example
This commit is contained in:
Éric Lemoine
2014-09-15 19:44:31 +02:00
parent 0b43183616 83ded37cbc
commit 7e502ac477
2 changed files with 45 additions and 13 deletions
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11
examples/tissot.html
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@@ -23,8 +23,13 @@
<div class="container-fluid">
<div class="row-fluid">
<div class="span12">
<div id="map" class="map"></div>
<div class="span6">
<h4>EPSG:4326</h4>
<div id="map4326" class="map"></div>
</div>
<div class="span6">
<h4>EPSG:3857</h4>
<div id="map3857" class="map"></div>
</div>
</div>
@@ -32,7 +37,7 @@
<div class="span12">
<h4 id="title">Tissot indicatrix example</h4>
<p id="shortdesc">Example of a <a href="http://en.wikipedia.org/wiki/Tissot's_indicatrix">Tissot indicatrix</a> map.</p>
<p id="shortdesc">Example of <a href="http://en.wikipedia.org/wiki/Tissot's_indicatrix">Tissot indicatrix</a> maps. The map on the left is an EPSG:4326 map. The one on the left is EPSG:3857.</p>
<div id="docs">
<p>See the <a href="tissot.js" target="_blank">tissot.js source</a> to see how this is done.</p>
</div>

47
examples/tissot.js
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@@ -8,9 +8,15 @@ goog.require('ol.layer.Vector');
goog.require('ol.source.TileWMS');
goog.require('ol.source.Vector');
var vectorSource = new ol.source.Vector();
var vectorLayer4326 = new ol.layer.Vector({
source: new ol.source.Vector()
});
var map = new ol.Map({
var vectorLayer3857 = new ol.layer.Vector({
source: new ol.source.Vector()
});
var map4326 = new ol.Map({
layers: [
new ol.layer.Tile({
source: new ol.source.TileWMS({
@@ -20,12 +26,10 @@ var map = new ol.Map({
}
})
}),
new ol.layer.Vector({
source: vectorSource
})
vectorLayer4326
],
renderer: 'canvas',
target: 'map',
target: 'map4326',
view: new ol.View({
projection: 'EPSG:4326',
center: [0, 0],
@@ -33,12 +37,35 @@ var map = new ol.Map({
})
});
var map3857 = new ol.Map({
layers: [
new ol.layer.Tile({
source: new ol.source.TileWMS({
url: 'http://demo.opengeo.org/geoserver/wms',
params: {
'LAYERS': 'ne:NE1_HR_LC_SR_W_DR'
}
})
}),
vectorLayer3857
],
renderer: 'canvas',
target: 'map3857',
view: new ol.View({
center: [0, 0],
zoom: 2
})
});
var wgs84Sphere = new ol.Sphere(6378137);
var radius = 800000;
for (var x = -180; x < 180; x += 30) {
for (var y = -90; y < 90; y += 30) {
var circle = ol.geom.Polygon.circular(wgs84Sphere, [x, y], radius, 64);
vectorSource.addFeature(new ol.Feature(circle));
var x, y;
for (x = -180; x < 180; x += 30) {
for (y = -90; y < 90; y += 30) {
var circle4326 = ol.geom.Polygon.circular(wgs84Sphere, [x, y], radius, 64);
var circle3857 = circle4326.clone().transform('EPSG:4326', 'EPSG:3857');
vectorLayer4326.getSource().addFeature(new ol.Feature(circle4326));
vectorLayer3857.getSource().addFeature(new ol.Feature(circle3857));
}
}