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Batch merge for rc2 of 2.7. 'svn merge -r7967:HEAD from trunk (Closes #1733) (Closes #1489) (Closes #1639) (Closes #1718) (Closes #1723) (Closes #1732) (Closes #1616) (Closes #1722)

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git-svn-id: http://svn.openlayers.org/branches/openlayers/2.7@8012 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
euzuro
2008-09-12 17:24:20 +00:00
parent a43e98762c
commit f7f338e265
51 changed files with 7219 additions and 90 deletions
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examples/measure.html
+35
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@@ -92,6 +92,31 @@
document.getElementById('noneToggle').checked = true;
}
function calcVincenty(geometry) {
/**
* Note: this function assumes geographic coordinates and
* will fail otherwise. OpenLayers.Util.distVincenty takes
* two objects representing points with geographic coordinates
* and returns the geodesic distance between them (shortest
* distance between the two points on an ellipsoid) in *kilometers*.
*
* It is important to realize that the segments drawn on the map
* are *not* geodesics (or "great circle" segments). This means
* that in general, the measure returned by this function
* will not represent the length of segments drawn on the map.
*/
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(
{lon: first.x, lat: first.y},
{lon: second.x, lat: second.y}
);
}
return dist;
}
function handleMeasurements(event) {
var geometry = event.geometry;
@@ -102,6 +127,10 @@
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>";
}
@@ -144,6 +173,12 @@
<label for="polygonToggle">measure area</label>
</li>
</ul>
<p>* Note that the geometries drawn are planar geometries and the
metrics returned by the measure control are planar measures. The
"great circle" distance does not necessarily represent the length
of the segments drawn on the map. Instead, it is a geodesic metric that
represents the cumulative shortest path between all vertices in the
geometry were they projected onto a sphere.</p>
</div>
</body>
</html>