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Optimize tile sizes (#112)

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This commit is contained in:
Michael Barry
2023-09-25 05:10:51 -04:00
committed by GitHub
parent 210c8fee67
commit fef4424bc2
10 changed files with 72 additions and 24 deletions
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29
src/main/java/org/openmaptiles/layers/Landuse.java
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@@ -48,10 +48,10 @@ import com.onthegomap.planetiler.stats.Stats;
import com.onthegomap.planetiler.util.Parse;
import com.onthegomap.planetiler.util.Translations;
import com.onthegomap.planetiler.util.ZoomFunction;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
import org.openmaptiles.OpenMapTilesProfile;
import org.openmaptiles.generated.OpenMapTilesSchema;
import org.openmaptiles.generated.Tables;
@@ -126,19 +126,20 @@ public class Landuse implements
@Override
public List<VectorTile.Feature> postProcess(int zoom,
List<VectorTile.Feature> items) throws GeometryException {
if (zoom < 6 || zoom > 12) {
return items;
} else {
// merging only merges polygons with class "residential" for z6-z12
Map<Boolean, List<VectorTile.Feature>> splitLists =
items.stream().collect(Collectors.partitioningBy(
i -> FieldValues.CLASS_RESIDENTIAL.equals(i.attrs().get(Fields.CLASS)))
);
List<VectorTile.Feature> result = splitLists.get(Boolean.FALSE);
List<VectorTile.Feature> toMerge = splitLists.get(Boolean.TRUE);
var merged = FeatureMerge.mergeNearbyPolygons(toMerge, 1, 1, 0.1, 0.1);
result.addAll(merged);
return result;
List<VectorTile.Feature> toMerge = new ArrayList<>();
List<VectorTile.Feature> result = new ArrayList<>();
for (var item : items) {
if (FieldValues.CLASS_RESIDENTIAL.equals(item.attrs().get(Fields.CLASS))) {
toMerge.add(item);
} else {
result.add(item);
}
}
var merged = zoom <= 12 ?
FeatureMerge.mergeNearbyPolygons(toMerge, 1, 1, 0.1, 0.1) :
// reduces size of some heavy z13-14 tiles with lots of small polygons
FeatureMerge.mergeMultiPolygon(toMerge);
result.addAll(merged);
return result;
}
}