I want to create a 3D model of an OSM map using osm2world. Osm2World can render maps of large regions, for example, there is a 3D map of Austria and Germany (generated from OSM).
I want to do something similar for a smaller region.
Since osm2world cannot handle large maps, I need to
- split the original map into smaller maps,
- transform the smaller maps to several OBJ files and
- combine these OBJ files into one big OBJ file of the entire region.
In order to split the maps, I downloaded splitter-r311 and tried to transform the original map into a small maps with minimum possible number of nodes using following call:
java -Xmx1G -jar splitter.jar --output=xml --output-dir=results --max-nodes=1000
input\RU-PRI.osm > splitter.log
This attempt failed. splitter.log contains following entries:
Warning: No solution found for partition (42.1875,130.341796875) to (48.6474609375,139.21875) with 541.648 nodes
Final solution has 0 tile(s) and a rating of 9223372036854775807. The smallest node count is 9223372036854775807, the worst aspect ratio is near -1.0
Failed to calculate areas.
Sorry. Cannot split the file without creating huge, almost empty, tiles.
Please specify a bounding polygon with the --polygon-file parameter.
Time finished: Sun Oct 06 00:42:21 MSK 2013
Total time taken: 2779s
What can I do in order to convert the original map into partial maps small enough to be processed by osm2world? Can I modify the input file to make it more osm2world-friendly?
I tried to run splitter with --max-nodes=16000, but got OutOfMemoryErrors when I tried to use them in osm2world.
I tried to use MapSplit, but it didn't work due to OutOfMemoryError, either.
Update 1 (13.10.2013 12:12 MSK):
1) I found out that the original file I wanted to convert was too large. Therefore, instead of the original file, I now use a smaller file 03-artyom.osm.
2) When trying to convert this file to OBJ, I had several errors. In order to fix them, I modified the code of OSM2World. Below is the diff and here is the modified source code:
diff --git a/src/org/osm2world/core/math/JTSConversionUtil.java b/src/org/osm2world/core/math/JTSConversionUtil.java
index 81f6fa2..f498a9b 100644
--- a/src/org/osm2world/core/math/JTSConversionUtil.java
+++ b/src/org/osm2world/core/math/JTSConversionUtil.java
@@ -89,7 +89,14 @@ public class JTSConversionUtil {
}
}
- return new PolygonWithHolesXZ(outerPolygon, holes);
+ final PolygonWithHolesXZ polygonWithHolesXZ = new PolygonWithHolesXZ(outerPolygon, holes);
+
+ if (polygonWithHolesXZ.getArea() == 0.0)
+ {
+ return null;
+ }
+
+ return polygonWithHolesXZ;
}
@@ -112,7 +119,12 @@ public class JTSConversionUtil {
if (geometry instanceof Polygon) {
if (geometry.getNumPoints() > 2) {
- result.add(polygonXZFromJTSPolygon((Polygon)geometry));
+ final PolygonWithHolesXZ polygonXZFromJTSPolygon =
+ polygonXZFromJTSPolygon((Polygon)geometry);
+ if (polygonXZFromJTSPolygon != null)
+ {
+ result.add(polygonXZFromJTSPolygon);
+ }
}
} else if (geometry instanceof GeometryCollection) {
GeometryCollection collection = (GeometryCollection)geometry;
diff --git a/src/org/osm2world/core/math/SimplePolygonXZ.java b/src/org/osm2world/core/math/SimplePolygonXZ.java
index 5a9dfa5..8d889d0 100644
--- a/src/org/osm2world/core/math/SimplePolygonXZ.java
+++ b/src/org/osm2world/core/math/SimplePolygonXZ.java
@@ -41,7 +41,7 @@ public class SimplePolygonXZ extends PolygonXZ {
this.area = Math.abs(signedArea);
this.clockwise = signedArea < 0;
- assertNonzeroArea();
+ // assertNonzeroArea();
}
public List<LineSegmentXZ> getSegments() {
diff --git a/src/org/osm2world/core/math/algorithms/Poly2TriTriangulationUtil.java b/src/org/osm2world/core/math/algorithms/Poly2TriTriangulationUtil.java
index 7d2c352..abfb629 100644
--- a/src/org/osm2world/core/math/algorithms/Poly2TriTriangulationUtil.java
+++ b/src/org/osm2world/core/math/algorithms/Poly2TriTriangulationUtil.java
@@ -6,6 +6,7 @@ import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;
+import java.util.LinkedList;
import java.util.List;
import java.util.Set;
@@ -107,7 +108,16 @@ public final class Poly2TriTriangulationUtil {
/* run triangulation */
- Poly2Tri.triangulate(triangulationPolygon);
+ try
+ {
+ Poly2Tri.triangulate(triangulationPolygon);
+ }
+ catch (NullPointerException exception)
+ {
+ // exception.printStackTrace();
+
+ return new LinkedList<TriangleXZ>();
+ }
/* convert the result to the desired format */
3) Now, when I run OSM2World (java org.osm2world.console.OSM2World --input D:\dev\osm2world\primorie\josm-manual\output\03-artyom.osm --output D:\dev\osm2world\primorie\josm-manual\output\04-artyom.osm.obj), I get following errors:
[main] WARN org.poly2tri.triangulation.delaunay.sweep.DTSweep - Skipping edge: Point on constrained edge not supported yet
Exception in thread "main" java.lang.StackOverflowError
at org.poly2tri.triangulation.TriangulationUtil.orient2d(TriangulationUtil.java:195)
at org.poly2tri.triangulation.delaunay.sweep.DTSweep.edgeEvent(DTSweep.java:573)
at org.poly2tri.triangulation.delaunay.sweep.DTSweep.edgeEvent(DTSweep.java:626)
at org.poly2tri.triangulation.delaunay.sweep.DTSweep.edgeEvent(DTSweep.java:604)
at org.poly2tri.triangulation.delaunay.sweep.DTSweep.edgeEvent(DTSweep.java:604)
at org.poly2tri.triangulation.delaunay.sweep.DTSweep.edgeEvent(DTSweep.java:626)
at org.poly2tri.triangulation.delaunay.sweep.DTSweep.edgeEvent(DTSweep.java:583)
at org.poly2tri.triangulation.delaunay.sweep.DTSweep.edgeEvent(DTSweep.java:583)
at org.poly2tri.triangulation.delaunay.sweep.DTSweep.edgeEvent(DTSweep.java:626)
at org.poly2tri.triangulation.delaunay.sweep.DTSweep.edgeEvent(DTSweep.java:604)
