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Merge overlapping water polygons (#235)

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This commit is contained in:
Michael Barry
2022-05-28 11:40:17 +02:00
committed by lazaa32
parent 07a660b18f
commit 9aaef36358
1 changed files with 14 additions and 1 deletions
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15
src/main/java/com/onthegomap/planetiler/openmaptiles/layers/Water.java
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@@ -36,15 +36,20 @@ See https://github.com/openmaptiles/openmaptiles/blob/master/LICENSE.md for deta
package com.onthegomap.planetiler.openmaptiles.layers;
import com.onthegomap.planetiler.FeatureCollector;
import com.onthegomap.planetiler.FeatureMerge;
import com.onthegomap.planetiler.ForwardingProfile;
import com.onthegomap.planetiler.VectorTile;
import com.onthegomap.planetiler.openmaptiles.OpenMapTilesProfile;
import com.onthegomap.planetiler.openmaptiles.generated.OpenMapTilesSchema;
import com.onthegomap.planetiler.openmaptiles.generated.Tables;
import com.onthegomap.planetiler.openmaptiles.util.Utils;
import com.onthegomap.planetiler.config.PlanetilerConfig;
import com.onthegomap.planetiler.expression.MultiExpression;
import com.onthegomap.planetiler.geo.GeometryException;
import com.onthegomap.planetiler.reader.SourceFeature;
import com.onthegomap.planetiler.stats.Stats;
import com.onthegomap.planetiler.util.Translations;
import java.util.List;
/**
* Defines the logic for generating map elements for oceans and lakes in the {@code water} layer from source features.
@@ -56,7 +61,8 @@ public class Water implements
OpenMapTilesSchema.Water,
Tables.OsmWaterPolygon.Handler,
OpenMapTilesProfile.NaturalEarthProcessor,
OpenMapTilesProfile.OsmWaterPolygonProcessor {
OpenMapTilesProfile.OsmWaterPolygonProcessor,
ForwardingProfile.FeaturePostProcessor {
/*
* At low zoom levels, use natural earth for oceans and major lakes, and at high zoom levels
@@ -66,9 +72,11 @@ public class Water implements
*/
private final MultiExpression.Index<String> classMapping;
private final PlanetilerConfig config;
public Water(Translations translations, PlanetilerConfig config, Stats stats) {
this.classMapping = FieldMappings.Class.index();
this.config = config;
}
@Override
@@ -116,4 +124,9 @@ public class Water implements
.setAttr(Fields.CLASS, clazz);
}
}
@Override
public List<VectorTile.Feature> postProcess(int zoom, List<VectorTile.Feature> items) throws GeometryException {
return items.size() > 1 ? FeatureMerge.mergeOverlappingPolygons(items, config.minFeatureSize(zoom)) : items;
}
}