Earth.java

package com.protomaps.basemap.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.geo.GeometryException;
import com.onthegomap.planetiler.reader.SourceFeature;
import com.protomaps.basemap.feature.FeatureId;
import com.protomaps.basemap.names.OsmNames;
import org.locationtech.jts.geom.Point;
import java.util.List;

public class Earth implements ForwardingProfile.LayerPostProcesser {
  @Override
  public String name() {
    return "earth";
  }

  public void processPreparedOsm(SourceFeature ignoredSf, FeatureCollector features) {
    features.polygon(this.name())
      .setAttr("kind", "earth")
      .setZoomRange(6, 15).setBufferPixels(8);
  }

  public void processNe(SourceFeature sf, FeatureCollector features) {
    var sourceLayer = sf.getSourceLayer();
    if (sourceLayer.equals("ne_50m_land")) {
      features.polygon(this.name()).setZoomRange(0, 4).setBufferPixels(8).setAttr("kind", "earth");
    } else if (sourceLayer.equals("ne_10m_land")) {
      features.polygon(this.name()).setZoomRange(5, 5).setBufferPixels(8).setAttr("kind", "earth");
    }
    if (sourceLayer.equals("ne_10m_glaciated_areas")) {
      try {
        Point centroid = (Point) sf.centroid();
        if (centroid.getY() > 0.7) {
          features.polygon("landcover")
            .setAttr("kind", "glacier")
            .setZoomRange(0, 7)
            .setMinPixelSize(0.0);
        }
      } catch (GeometryException e) {
        System.out.println("Error: " + e);
      }
    }
  }

  public void processOsm(SourceFeature sf, FeatureCollector features) {
    if (sf.canBeLine() && !sf.canBePolygon() && sf.hasTag("natural", "cliff")) {
      int minZoom = 12;
      var feat = features.line(this.name())
        .setId(FeatureId.create(sf))
        .setAttr("min_zoom", minZoom + 1)
        .setAttr("kind", "cliff")
        .setZoomRange(minZoom, 15);

      OsmNames.setOsmNames(feat, sf, 0);
    }
  }

  @Override
  public List<VectorTile.Feature> postProcess(int zoom, List<VectorTile.Feature> items) throws GeometryException {
    return FeatureMerge.mergeOverlappingPolygons(items, 1);
  }
}