Hi Gerd,
I don't observe any significant differences in compilation. But to make
it more optimized, we can put SizeFilter before DouglasPeuckerFilter. I
have attached a second patch here.
There is a difference in results. See pictures with DouglasPeuckerFilter
after RoundCoordsFilter and new version with DouglasPeuckerFilter
before. This is for 22-bit resolution, so effects are probably more clear.
--
Best regards,
Andrzej
Index: src/uk/me/parabola/mkgmap/build/MapBuilder.java
===================================================================
--- src/uk/me/parabola/mkgmap/build/MapBuilder.java (revision 4677)
+++ src/uk/me/parabola/mkgmap/build/MapBuilder.java (working copy)
@@ -1188,10 +1188,10 @@
LayerFilterChain filters = new LayerFilterChain(config);
if (enableLineCleanFilters && (res < 24)) {
- filters.addFilter(new RoundCoordsFilter());
filters.addFilter(new SizeFilter(MIN_SIZE_LINE));
if(reducePointError > 0)
filters.addFilter(new
DouglasPeuckerFilter(reducePointError));
+ filters.addFilter(new RoundCoordsFilter());
}
filters.addFilter(new LineSplitterFilter());
filters.addFilter(new RemoveEmpty());
@@ -1243,7 +1243,6 @@
LayerFilterChain filters = new LayerFilterChain(config);
filters.addFilter(new PolygonSplitterFilter());
if (enableLineCleanFilters && (res < 24)) {
- filters.addFilter(new RoundCoordsFilter());
int sizefilterVal =
getMinSizePolygonForResolution(res);
if (sizefilterVal > 0)
filters.addFilter(new
SizeFilter(sizefilterVal));
@@ -1251,6 +1250,7 @@
//Is there an similar algorithm for polygons?
if(reducePointErrorPolygon > 0)
filters.addFilter(new
DouglasPeuckerFilter(reducePointErrorPolygon));
+ filters.addFilter(new RoundCoordsFilter());
}
filters.addFilter(new RemoveObsoletePointsFilter());
filters.addFilter(new RemoveEmpty());
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