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path: root/misc/openlayers/examples/simplify-linestring.js
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Diffstat (limited to 'misc/openlayers/examples/simplify-linestring.js')
-rw-r--r--misc/openlayers/examples/simplify-linestring.js599
1 files changed, 0 insertions, 599 deletions
diff --git a/misc/openlayers/examples/simplify-linestring.js b/misc/openlayers/examples/simplify-linestring.js
deleted file mode 100644
index 3f4c6f6..0000000
--- a/misc/openlayers/examples/simplify-linestring.js
+++ /dev/null
@@ -1,599 +0,0 @@
-// global variables
-var map, map2;
-
-// wrap the instanciation code in an anonymous function that gets executed
-// immedeately
-(function(){
- // style the vectorlayer
- var styleMap = new OpenLayers.StyleMap({
- 'default': new OpenLayers.Style({
- strokeColor: "#333333",
- strokeWidth: 1.2,
- strokeOpacity: 1
- })
- });
-
- // the vectorlayer
- var vectorlayer = new OpenLayers.Layer.Vector('Vectorlayer', {
- isBaseLayer: true,
- styleMap: styleMap
- });
-
- var original = OpenLayers.Geometry.fromWKT("LINESTRING(" +
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- );
- vectorlayer.addFeatures([new OpenLayers.Feature.Vector(original)]);
- var maxExtent = vectorlayer.getDataExtent();
- // instanciate the map
- map = new OpenLayers.Map("map", {
- fractionalZoom: true,
- maxExtent: maxExtent,
- layers: [vectorlayer]
- });
- map.zoomToMaxExtent();
- map.events.register('moveend', map, function(){
- map2.setCenter(map.getCenter(), map.getZoom());
- });
-
-
- var vectorlayer2 = new OpenLayers.Layer.Vector('Vectorlayer simplified', {
- isBaseLayer: true,
- styleMap: styleMap
- });
-
- map2 = new OpenLayers.Map("map-simplify", {
- fractionalZoom: true,
- maxExtent: maxExtent,
- controls: [],
- layers: [vectorlayer2]
- });
- map2.zoomToExtent(maxExtent);
-
- // Control behaviour
- var lastValue = 0.1;
- var simplify = function() {
- var min = 0;
- var max = 1;
- var givenVal= parseFloat(document.getElementById('tolerance').value);
- var useVal = lastValue;
- if (!isNaN(givenVal)) {
- if (givenVal >= min && givenVal <= max) {
- useVal = givenVal;
- } else {
- useVal = (givenVal < min) ? min : max;
- }
- }
- document.getElementById('tolerance').value = useVal;
- vectorlayer2.removeFeatures(vectorlayer2.features);
- var newLineString = original.simplify(useVal);
- vectorlayer2.addFeatures([new OpenLayers.Feature.Vector(newLineString)]);
- var originalVerticesCnt = original.getVertices().length;
- var simplifiedVerticesCnt = newLineString.getVertices().length;
- var infotxt = '<ul><li>Original LineString: <strong>';
- infotxt += originalVerticesCnt + ' vertices</strong></li>';
- infotxt += ' <li>Simplified geometry: <strong>' + simplifiedVerticesCnt + ' vertices</strong></li>';
- infotxt += ' <li>Decreased by <strong>' + (((originalVerticesCnt-simplifiedVerticesCnt)/originalVerticesCnt)*100).toFixed(2) + ' per cent</strong></li></ul>';
- document.getElementById('info').innerHTML = infotxt;
- lastValue = useVal;
- };
- document.getElementById('tolerance').value = lastValue;
- document.getElementById('simplify').onclick = simplify;
- simplify();
-
- var animationInterval;
- var animationHandler = function(){
- if (this.value === 'Start animation') {
- document.getElementById('simplify').disabled = true;
- document.getElementById('animation').value = "Stop animation";
- animationInterval = window.setInterval(function(){
- var tolerance = parseFloat(document.getElementById('tolerance').value);
- if (tolerance < 1) {
- tolerance+=0.02;
- } else {
- tolerance = 0.02;
- }
- document.getElementById('tolerance').value = tolerance.toFixed(2);
- simplify();
- }, 500);
- simplify();
- } else {
- if (animationInterval) {
- window.clearInterval(animationInterval);
- }
- document.getElementById('simplify').disabled = false;
- document.getElementById('animation').value = "Start animation";
- }
- };
- document.getElementById('animation').onclick = animationHandler;
-})();
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 22:16:18 +0000