xiaoyan159/vtm
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Mapsforge: reduce points on-the-fly while reading from map files (improvements) #757

Browse Source
This commit is contained in:
Emux
2019-12-13 19:14:33 +02:00
parent 412cacd1c2
commit 766b0d9914
3 changed files with 10 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
vtm/src/org/oscim/tiling/source/mapfile/MapDatabase.java
View File

@@ -263,15 +263,13 @@ public class MapDatabase implements ITileDataSource {
mTileProjection.setTile(tile);
//mTile = tile;
if (tile.zoomLevel < SIMPLIFICATION_MIN_ZOOM || tile.zoomLevel > SIMPLIFICATION_MAX_ZOOM) {
minDeltaLat = 0;
minDeltaLon = 0;
} else {
if (Parameters.SIMPLIFICATION_TOLERANCE > 0
&& tile.zoomLevel >= SIMPLIFICATION_MIN_ZOOM && tile.zoomLevel <= SIMPLIFICATION_MAX_ZOOM) {
/* size of tile in map coordinates; */
double size = 1.0 / (1 << tile.zoomLevel);
/* simplification tolerance */
int pixel = 2;
int pixel = Parameters.SIMPLIFICATION_TOLERANCE;
int simplify = Tile.SIZE / pixel;
@@ -281,6 +279,9 @@ public class MapDatabase implements ITileDataSource {
- MercatorProjection.toLatitude(tile.y)) * 1e6) / simplify;
minDeltaLon = (int) (Math.abs(MercatorProjection.toLongitude(tile.x + size)
- MercatorProjection.toLongitude(tile.x)) * 1e6) / simplify;
} else {
minDeltaLat = 0;
minDeltaLon = 0;
}
QueryParameters queryParameters = new QueryParameters();
@@ -815,7 +816,7 @@ public class MapDatabase implements ITileDataSource {
} else if (lat == pLat && lon == pLon) {
/* drop small distance intermediate nodes */
//log.debug("drop zero delta ");
} else if (!Parameters.SIMPLIFICATION
} else if (Parameters.SIMPLIFICATION_TOLERANCE == 0
|| (e.tags.contains(TAG_ISSEA)
|| e.tags.contains(TAG_SEA)
|| e.tags.contains(TAG_NOSEA)

3
vtm/src/org/oscim/utils/Parameters.java
View File

@@ -64,8 +64,9 @@ public final class Parameters {
/**
* Reduce points on-the-fly while reading from map files.
* e.g. 0 (no simplification), 2, 4, ...
*/
public static boolean SIMPLIFICATION = false;
public static int SIMPLIFICATION_TOLERANCE = 0;
/**
* Texture atlas in themes.