Android-builders-club/OsmAnd
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

Add method

Browse source
This commit is contained in:
vshcherb 2013-09-02 21:31:31 +02:00
parent 7075f10737
commit 74061ebb4f
1 changed files with 21 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

21
OsmAnd-java/src/net/osmand/osm/edit/OsmMapUtils.java
View file

@ -307,6 +307,27 @@ public class OsmMapUtils {
}
}
/**
* Get the area in pixels
* @param nodes
* @return
*/
public static double polygonAreaPixels(List<Node> nodes, int zoom) {
double area = 0.;
double mult = 1 / MapUtils.getPowZoom(Math.max(31 - (zoom + 8), 0));
int j = nodes.size() - 1;
for (int i = 0; i < nodes.size(); i++) {
Node x = nodes.get(i);
Node y = nodes.get(j);
if(x != null && y != null) {
area += (MapUtils.get31TileNumberX(y.getLongitude()) + (double)MapUtils.get31TileNumberX(x.getLongitude()))*
(MapUtils.get31TileNumberY(y.getLatitude()) - (double)MapUtils.get31TileNumberY(x.getLatitude()));
}
j = i;
}
return Math.abs(area) * mult * mult * .5;
}
/**
* Get the area (in m²) of a closed way, represented as a list of nodes
*