diff options
Diffstat (limited to 'misc/openlayers/examples/measure.html')
| -rw-r--r-- | misc/openlayers/examples/measure.html | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/misc/openlayers/examples/measure.html b/misc/openlayers/examples/measure.html new file mode 100644 index 0000000..1cf61ad --- /dev/null +++ b/misc/openlayers/examples/measure.html @@ -0,0 +1,203 @@ +<!DOCTYPE html> +<html> + <head> + <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> + <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0"> + <meta name="apple-mobile-web-app-capable" content="yes"> + <link rel="stylesheet" href="../theme/default/style.css" type="text/css"> + <link rel="stylesheet" href="style.css" type="text/css"> + <style type="text/css"> + #controlToggle li { + list-style: none; + } + p { + width: 512px; + } + #options { + position: relative; + width: 512px; + } + #output { + float: right; + } + + /* avoid pink tiles */ + .olImageLoadError { + background-color: transparent !important; + } + </style> + <script src="../lib/OpenLayers.js"></script> + <script type="text/javascript"> + var map, measureControls; + function init(){ + map = new OpenLayers.Map('map'); + + var wmsLayer = new OpenLayers.Layer.WMS( "OpenLayers WMS", + "http://vmap0.tiles.osgeo.org/wms/vmap0?", {layers: 'basic'}); + + map.addLayers([wmsLayer]); + map.addControl(new OpenLayers.Control.LayerSwitcher()); + map.addControl(new OpenLayers.Control.MousePosition()); + + // style the sketch fancy + var sketchSymbolizers = { + "Point": { + pointRadius: 4, + graphicName: "square", + fillColor: "white", + fillOpacity: 1, + strokeWidth: 1, + strokeOpacity: 1, + strokeColor: "#333333" + }, + "Line": { + strokeWidth: 3, + strokeOpacity: 1, + strokeColor: "#666666", + strokeDashstyle: "dash" + }, + "Polygon": { + strokeWidth: 2, + strokeOpacity: 1, + strokeColor: "#666666", + fillColor: "white", + fillOpacity: 0.3 + } + }; + var style = new OpenLayers.Style(); + style.addRules([ + new OpenLayers.Rule({symbolizer: sketchSymbolizers}) + ]); + var styleMap = new OpenLayers.StyleMap({"default": style}); + + // allow testing of specific renderers via "?renderer=Canvas", etc + var renderer = OpenLayers.Util.getParameters(window.location.href).renderer; + renderer = (renderer) ? [renderer] : OpenLayers.Layer.Vector.prototype.renderers; + + measureControls = { + line: new OpenLayers.Control.Measure( + OpenLayers.Handler.Path, { + persist: true, + handlerOptions: { + layerOptions: { + renderers: renderer, + styleMap: styleMap + } + } + } + ), + polygon: new OpenLayers.Control.Measure( + OpenLayers.Handler.Polygon, { + persist: true, + handlerOptions: { + layerOptions: { + renderers: renderer, + styleMap: styleMap + } + } + } + ) + }; + + var control; + for(var key in measureControls) { + control = measureControls[key]; + control.events.on({ + "measure": handleMeasurements, + "measurepartial": handleMeasurements + }); + map.addControl(control); + } + + map.setCenter(new OpenLayers.LonLat(0, 0), 3); + + document.getElementById('noneToggle').checked = true; + } + + function handleMeasurements(event) { + var geometry = event.geometry; + var units = event.units; + var order = event.order; + var measure = event.measure; + var element = document.getElementById('output'); + var out = ""; + if(order == 1) { + out += "measure: " + measure.toFixed(3) + " " + units; + } else { + out += "measure: " + measure.toFixed(3) + " " + units + "<sup>2</" + "sup>"; + } + element.innerHTML = out; + } + + function toggleControl(element) { + for(key in measureControls) { + var control = measureControls[key]; + if(element.value == key && element.checked) { + control.activate(); + } else { + control.deactivate(); + } + } + } + + function toggleGeodesic(element) { + for(key in measureControls) { + var control = measureControls[key]; + control.geodesic = element.checked; + } + } + + function toggleImmediate(element) { + for(key in measureControls) { + var control = measureControls[key]; + control.setImmediate(element.checked); + } + } + </script> + </head> + <body onload="init()"> + <h1 id="title">OpenLayers Measure Example</h1> + <div id="tags"> + measuring, geodesic, area, length, distance + </div> + <p id="shortdesc"> + Demonstrates the measure control to measure distances and areas. + </p> + <div id="map" class="smallmap"></div> + <div id="options"> + <div id="output"> + </div> + <ul id="controlToggle"> + <li> + <input type="radio" name="type" value="none" id="noneToggle" + onclick="toggleControl(this);" checked="checked" /> + <label for="noneToggle">navigate</label> + </li> + <li> + <input type="radio" name="type" value="line" id="lineToggle" onclick="toggleControl(this);" /> + <label for="lineToggle">measure distance</label> + </li> + <li> + <input type="radio" name="type" value="polygon" id="polygonToggle" onclick="toggleControl(this);" /> + <label for="polygonToggle">measure area</label> + </li> + <li> + <input type="checkbox" name="geodesic" id="geodesicToggle" onclick="toggleGeodesic(this);" /> + <label for="geodesicToggle">use geodesic measures</label> + </li> + <li> + <input type="checkbox" name="immediate" id="immediateToggle" onclick="toggleImmediate(this);" /> + <label for="immediateToggle">use immediate measures</label> + </li> + </ul> + <p>Note that the geometries drawn are planar geometries and the + metrics returned by the measure control are planar measures by + default. If your map is in a geographic projection or you have the + appropriate projection definitions to transform your geometries into + geographic coordinates, you can set the "geodesic" property of the control + to true to calculate geodesic measures instead of planar measures. + Also you have the possibility to set the "immediate" property to true + to get a new calculated value once the mouse has been mooved.</p> + </div> + </body> +</html> |