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Measure includes a great circle distance, to emonstrate the ability to use

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the geometry attached to the event to generate your own length measurement.


git-svn-id: http://svn.openlayers.org/trunk/openlayers@7970 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
crschmidt
2008-09-06 16:09:13 +00:00
parent f935c599d1
commit e301cc2ab0
1 changed files with 17 additions and 0 deletions
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17
examples/measure.html
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@@ -92,6 +92,19 @@
document.getElementById('noneToggle').checked = true;
}
function calcVincenty(geometry) {
var dist = 0;
for (var i = 1; i < geometry.components.length; i++) {
var first = geometry.components[i-1];
var second = geometry.components[i];
dist += OpenLayers.Util.distVincenty(
new OpenLayers.LonLat(first.x, first.y),
new OpenLayers.LonLat(second.x, second.y)
);
}
return dist;
}
function handleMeasurements(event) {
var geometry = event.geometry;
@@ -102,6 +115,10 @@
var out = "";
if(order == 1) {
out += "measure: " + measure.toFixed(3) + " " + units;
if (map.getProjection() == "EPSG:4326") {
out += "<br /> Great Circle Distance: " +
calcVincenty(geometry).toFixed(3) + " km";
}
} else {
out += "measure: " + measure.toFixed(3) + " " + units + "<sup>2</" + "sup>";
}