Vector tiles: order hits by geometry size by default

modules/lang-painless/src/main/resources/org/elasticsearch/painless/spi/org.elasticsearch.txt

@@ -158,6 +158,8 @@ class org.elasticsearch.index.fielddata.ScriptDocValues$Geometry {
   int getDimensionalType()
   org.elasticsearch.common.geo.GeoPoint getCentroid()
   org.elasticsearch.common.geo.GeoBoundingBox getBoundingBox()
+  double getMercatorWidth()
+  double getMercatorHeight()
 }
 
 class org.elasticsearch.index.fielddata.ScriptDocValues$GeoPoints {

modules/lang-painless/src/yamlRestTest/resources/rest-api-spec/test/painless/50_script_doc_values.yml

@@ -182,6 +182,20 @@ setup:
                             source: "doc['geo_point'].getDimensionalType()"
     - match: { hits.hits.0.fields.type.0: 0 }
 
+    - do:
+        search:
+          rest_total_hits_as_int: true
+          body:
+            script_fields:
+              width:
+                script:
+                  source: "doc['geo_point'].getMercatorWidth()"
+              height:
+                script:
+                  source: "doc['geo_point'].getMercatorHeight()"
+    - match: { hits.hits.0.fields.width.0: 0.0 }
+    - match: { hits.hits.0.fields.height.0: 0.0 }
+
 ---
 "ip":
     - do:

x-pack/plugin/vector-tile/src/main/java/org/elasticsearch/xpack/vectortile/feature/SphericalMercatorUtils.java → server/src/main/java/org/elasticsearch/common/geo/SphericalMercatorUtils.java

@@ -1,20 +1,22 @@
 /*
  * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
  * or more contributor license agreements. Licensed under the Elastic License
- * 2.0; you may not use this file except in compliance with the Elastic License
- * 2.0.
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
  */
 
-package org.elasticsearch.xpack.vectortile.feature;
+package org.elasticsearch.common.geo;
 
 import org.elasticsearch.geometry.Rectangle;
 
 /**
  * Utility functions to transforms WGS84 coordinates into spherical mercator.
  */
-class SphericalMercatorUtils {
+public class SphericalMercatorUtils {
 
-    private static double MERCATOR_FACTOR = 20037508.34 / 180.0;
+    public static final double MERCATOR_BOUNDS = 20037508.34;
+    private static final double MERCATOR_FACTOR = MERCATOR_BOUNDS / 180.0;
 
     /**
      * Transforms WGS84 longitude to a Spherical mercator longitude

server/src/main/java/org/elasticsearch/index/fielddata/ScriptDocValues.java

@@ -255,6 +255,10 @@ public abstract static class Geometry<T> extends ScriptDocValues<T> {
         public abstract GeoBoundingBox getBoundingBox();
         /** Returns the centroid of this geometry  */
         public abstract GeoPoint getCentroid();
+        /** Returns the width of the bounding box diagonal in the spherical Mercator projection (meters)  */
+        public abstract double getMercatorWidth();
+        /** Returns the height of the bounding box diagonal in the spherical Mercator projection (meters) */
+        public abstract double getMercatorHeight();
     }
 
     public static final class GeoPoints extends Geometry<GeoPoint> {
@@ -418,6 +422,16 @@ public GeoPoint getCentroid() {
             return size() == 0 ? null : centroid;
         }
 
+        @Override
+        public double getMercatorWidth() {
+            return 0;
+        }
+
+        @Override
+        public double getMercatorHeight() {
+            return 0;
+        }
+
         @Override
         public GeoBoundingBox getBoundingBox() {
           return size() == 0 ? null : boundingBox;

server/src/test/java/org/elasticsearch/common/geo/SphericalMercatorUtilTests.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+package org.elasticsearch.common.geo;
+
+import org.elasticsearch.geo.GeometryTestUtils;
+import org.elasticsearch.geometry.Rectangle;
+import org.elasticsearch.search.aggregations.bucket.geogrid.GeoTileUtils;
+import org.elasticsearch.test.ESTestCase;
+import org.hamcrest.Matchers;
+
+import static org.elasticsearch.common.geo.SphericalMercatorUtils.MERCATOR_BOUNDS;
+import static org.elasticsearch.common.geo.SphericalMercatorUtils.lonToSphericalMercator;
+import static org.elasticsearch.common.geo.SphericalMercatorUtils.latToSphericalMercator;
+import static org.elasticsearch.common.geo.SphericalMercatorUtils.recToSphericalMercator;
+
+public class SphericalMercatorUtilTests extends ESTestCase {
+
+    public void testLon() {
+        assertThat(lonToSphericalMercator(180.0), Matchers.equalTo(MERCATOR_BOUNDS));
+        assertThat(lonToSphericalMercator(-180.0), Matchers.equalTo(-MERCATOR_BOUNDS));
+        assertThat(lonToSphericalMercator(0.0), Matchers.equalTo(0.0));
+        final double lon = lonToSphericalMercator(GeometryTestUtils.randomLon());
+        assertThat(lon, Matchers.greaterThanOrEqualTo(-MERCATOR_BOUNDS));
+        assertThat(lon, Matchers.lessThanOrEqualTo(MERCATOR_BOUNDS));
+    }
+
+    public void testLat() {
+        assertThat(latToSphericalMercator(GeoTileUtils.LATITUDE_MASK), Matchers.closeTo(MERCATOR_BOUNDS, 1e-7));
+        assertThat(latToSphericalMercator(-GeoTileUtils.LATITUDE_MASK), Matchers.closeTo(-MERCATOR_BOUNDS, 1e-7));
+        assertThat(latToSphericalMercator(0.0), Matchers.closeTo(0, 1e-7));
+        final double lat = latToSphericalMercator(randomValueOtherThanMany(
+            l -> l >= GeoTileUtils.LATITUDE_MASK || l <= -GeoTileUtils.LATITUDE_MASK,
+            GeometryTestUtils::randomLat
+        ));
+        assertThat(lat, Matchers.greaterThanOrEqualTo(-MERCATOR_BOUNDS));
+        assertThat(lat, Matchers.lessThanOrEqualTo(MERCATOR_BOUNDS));
+    }
+
+    public void testRectangle() {
+        Rectangle rect = GeometryTestUtils.randomRectangle();
+        Rectangle mercatorRect = recToSphericalMercator(rect);
+        assertThat(mercatorRect.getMinX(), Matchers.equalTo(lonToSphericalMercator(rect.getMinX())));
+        assertThat(mercatorRect.getMaxX(), Matchers.equalTo(lonToSphericalMercator(rect.getMaxX())));
+        assertThat(mercatorRect.getMinY(), Matchers.equalTo(latToSphericalMercator(rect.getMinY())));
+        assertThat(mercatorRect.getMaxY(), Matchers.equalTo(latToSphericalMercator(rect.getMaxY())));
+    }
+}

x-pack/plugin/spatial/src/main/java/org/elasticsearch/xpack/spatial/index/fielddata/plain/AbstractAtomicGeoShapeShapeFieldData.java

@@ -19,6 +19,9 @@
 import java.util.Collection;
 import java.util.Collections;
 
+import static org.elasticsearch.common.geo.SphericalMercatorUtils.latToSphericalMercator;
+import static org.elasticsearch.common.geo.SphericalMercatorUtils.lonToSphericalMercator;
+
 public abstract class AbstractAtomicGeoShapeShapeFieldData implements LeafGeoShapeFieldData {
 
     @Override
@@ -88,6 +91,16 @@ public GeoPoint getCentroid() {
             return value == null ? null : centroid;
         }
 
+        @Override
+        public double getMercatorWidth() {
+            return lonToSphericalMercator(boundingBox.right()) - lonToSphericalMercator(boundingBox.left());
+        }
+
+        @Override
+        public double getMercatorHeight() {
+            return latToSphericalMercator(boundingBox.top()) - latToSphericalMercator(boundingBox.bottom());
+        }
+
         @Override
         public GeoBoundingBox getBoundingBox() {
             return value == null ? null : boundingBox;

x-pack/plugin/spatial/src/yamlRestTest/resources/rest-api-spec/test/70_script_doc_values.yml

@@ -91,3 +91,19 @@ setup:
                 source: "doc['geo_shape'].get(0)"
 
   - match: { error.root_cause.0.reason: "cannot write xcontent for geo_shape doc value" }
+
+---
+"diagonal length":
+  - do:
+      search:
+        rest_total_hits_as_int: true
+        body:
+          script_fields:
+            width:
+              script:
+                source: "doc['geo_shape'].getMercatorWidth()"
+            height:
+              script:
+                source: "doc['geo_shape'].getMercatorHeight()"
+  - match: { hits.hits.0.fields.width.0: 389.62170283915475 }
+  - match: { hits.hits.0.fields.height.0: 333.37976840604097 }

x-pack/plugin/vector-tile/src/javaRestTest/java/org/elasticsearch/xpack/vectortile/VectorTileRestIT.java

@@ -165,7 +165,7 @@ public void testBasicGet() throws Exception {
         assertThat(tile.getLayersCount(), Matchers.equalTo(3));
         assertLayer(tile, HITS_LAYER, 4096, 33, 1);
         assertLayer(tile, AGGS_LAYER, 4096, 1, 1);
-        assertLayer(tile, META_LAYER, 4096, 1, 14);
+        assertLayer(tile, META_LAYER, 4096, 1, 13);
     }
 
     public void testExtent() throws Exception {
@@ -175,7 +175,7 @@ public void testExtent() throws Exception {
         assertThat(tile.getLayersCount(), Matchers.equalTo(3));
         assertLayer(tile, HITS_LAYER, 256, 33, 1);
         assertLayer(tile, AGGS_LAYER, 256, 1, 1);
-        assertLayer(tile, META_LAYER, 256, 1, 14);
+        assertLayer(tile, META_LAYER, 256, 1, 13);
     }
 
     public void testExtentURL() throws Exception {
@@ -188,7 +188,7 @@ public void testExtentURL() throws Exception {
         assertThat(tile.getLayersCount(), Matchers.equalTo(3));
         assertLayer(tile, HITS_LAYER, 512, 33, 1);
         assertLayer(tile, AGGS_LAYER, 512, 1, 1);
-        assertLayer(tile, META_LAYER, 512, 1, 14);
+        assertLayer(tile, META_LAYER, 512, 1, 13);
     }
 
     public void testExactBounds() throws Exception {
@@ -244,7 +244,7 @@ public void testGridPrecision() throws Exception {
             assertThat(tile.getLayersCount(), Matchers.equalTo(3));
             assertLayer(tile, HITS_LAYER, 4096, 33, 1);
             assertLayer(tile, AGGS_LAYER, 4096, 1, 1);
-            assertLayer(tile, META_LAYER, 4096, 1, 14);
+            assertLayer(tile, META_LAYER, 4096, 1, 13);
         }
         {
             final Request mvtRequest = new Request(getHttpMethod(), INDEX_POINTS + "/_mvt/location/" + z + "/" + x + "/" + y);
@@ -262,7 +262,7 @@ public void testGridType() throws Exception {
             assertThat(tile.getLayersCount(), Matchers.equalTo(3));
             assertLayer(tile, HITS_LAYER, 4096, 33, 1);
             assertLayer(tile, AGGS_LAYER, 4096, 1, 1);
-            assertLayer(tile, META_LAYER, 4096, 1, 14);
+            assertLayer(tile, META_LAYER, 4096, 1, 13);
             assertFeatureType(tile, AGGS_LAYER, VectorTile.Tile.GeomType.POINT);
         }
         {
@@ -272,7 +272,7 @@ public void testGridType() throws Exception {
             assertThat(tile.getLayersCount(), Matchers.equalTo(3));
             assertLayer(tile, HITS_LAYER, 4096, 33, 1);
             assertLayer(tile, AGGS_LAYER, 4096, 1, 1);
-            assertLayer(tile, META_LAYER, 4096, 1, 14);
+            assertLayer(tile, META_LAYER, 4096, 1, 13);
             assertFeatureType(tile, AGGS_LAYER, VectorTile.Tile.GeomType.POLYGON);
         }
         {
@@ -293,7 +293,7 @@ public void testGridTypeURL() throws Exception {
         assertThat(tile.getLayersCount(), Matchers.equalTo(3));
         assertLayer(tile, HITS_LAYER, 4096, 33, 1);
         assertLayer(tile, AGGS_LAYER, 4096, 1, 1);
-        assertLayer(tile, META_LAYER, 4096, 1, 14);
+        assertLayer(tile, META_LAYER, 4096, 1, 13);
         assertFeatureType(tile, AGGS_LAYER, VectorTile.Tile.GeomType.POLYGON);
     }
 
@@ -303,7 +303,7 @@ public void testNoAggLayer() throws Exception {
         final VectorTile.Tile tile = execute(mvtRequest);
         assertThat(tile.getLayersCount(), Matchers.equalTo(2));
         assertLayer(tile, HITS_LAYER, 4096, 33, 1);
-        assertLayer(tile, META_LAYER, 4096, 1, 9);
+        assertLayer(tile, META_LAYER, 4096, 1, 8);
     }
 
     public void testNoAggLayerURL() throws Exception {
@@ -315,7 +315,7 @@ public void testNoAggLayerURL() throws Exception {
         final VectorTile.Tile tile = execute(mvtRequest);
         assertThat(tile.getLayersCount(), Matchers.equalTo(2));
         assertLayer(tile, HITS_LAYER, 4096, 33, 1);
-        assertLayer(tile, META_LAYER, 4096, 1, 9);
+        assertLayer(tile, META_LAYER, 4096, 1, 8);
     }
 
     public void testNoHitsLayer() throws Exception {
@@ -336,6 +336,31 @@ public void testNoHitsLayerURL() throws Exception {
         assertLayer(tile, META_LAYER, 4096, 1, 13);
     }
 
+    public void testDefaultSort() throws Exception {
+        {
+            final Request mvtRequest = new Request(getHttpMethod(), INDEX_ALL + "/_mvt/location/" + z + "/" + x + "/" + y);
+            mvtRequest.setJsonEntity("{\"size\": 100 }");
+            final VectorTile.Tile tile = execute(mvtRequest);
+            assertThat(tile.getLayersCount(), Matchers.equalTo(3));
+            assertLayer(tile, HITS_LAYER, 4096, 34, 1);
+            final VectorTile.Tile.Layer layer = getLayer(tile, HITS_LAYER);
+            assertThat(layer.getFeatures(0).getType(), Matchers.equalTo(VectorTile.Tile.GeomType.POLYGON));
+            assertLayer(tile, AGGS_LAYER, 4096, 256 * 256, 1);
+            assertLayer(tile, META_LAYER, 4096, 1, 13);
+        }
+        {
+            final Request mvtRequest = new Request(getHttpMethod(), INDEX_ALL + "/_mvt/location/" + z + "/" + x + "/" + y);
+            mvtRequest.setJsonEntity("{\"size\": 100, \"sort\" : []}"); // override default sort
+            final VectorTile.Tile tile = execute(mvtRequest);
+            assertThat(tile.getLayersCount(), Matchers.equalTo(3));
+            assertLayer(tile, HITS_LAYER, 4096, 34, 1);
+            final VectorTile.Tile.Layer layer = getLayer(tile, HITS_LAYER);
+            assertThat(layer.getFeatures(0).getType(), Matchers.equalTo(VectorTile.Tile.GeomType.POINT));
+            assertLayer(tile, AGGS_LAYER, 4096, 256 * 256, 1);
+            assertLayer(tile, META_LAYER, 4096, 1, 14);
+        }
+    }
+
     public void testRuntimeFieldWithSort() throws Exception {
         String runtimeMapping = "\"runtime_mappings\": {\n"
             + "  \"width\": {\n"
@@ -415,7 +440,7 @@ public void testBasicQueryGet() throws Exception {
         assertThat(tile.getLayersCount(), Matchers.equalTo(3));
         assertLayer(tile, HITS_LAYER, 4096, 1, 1);
         assertLayer(tile, AGGS_LAYER, 4096, 1, 1);
-        assertLayer(tile, META_LAYER, 4096, 1, 14);
+        assertLayer(tile, META_LAYER, 4096, 1, 13);
     }
 
     public void testBasicShape() throws Exception {
@@ -424,7 +449,7 @@ public void testBasicShape() throws Exception {
         assertThat(tile.getLayersCount(), Matchers.equalTo(3));
         assertLayer(tile, HITS_LAYER, 4096, 1, 1);
         assertLayer(tile, AGGS_LAYER, 4096, 256 * 256, 1);
-        assertLayer(tile, META_LAYER, 4096, 1, 14);
+        assertLayer(tile, META_LAYER, 4096, 1, 13);
     }
 
     public void testWithFields() throws Exception {
@@ -434,7 +459,7 @@ public void testWithFields() throws Exception {
         assertThat(tile.getLayersCount(), Matchers.equalTo(3));
         assertLayer(tile, HITS_LAYER, 4096, 1, 3);
         assertLayer(tile, AGGS_LAYER, 4096, 256 * 256, 1);
-        assertLayer(tile, META_LAYER, 4096, 1, 14);
+        assertLayer(tile, META_LAYER, 4096, 1, 13);
     }
 
     public void testMinAgg() throws Exception {
@@ -454,7 +479,7 @@ public void testMinAgg() throws Exception {
         assertThat(tile.getLayersCount(), Matchers.equalTo(3));
         assertLayer(tile, HITS_LAYER, 4096, 1, 1);
         assertLayer(tile, AGGS_LAYER, 4096, 256 * 256, 2);
-        assertLayer(tile, META_LAYER, 4096, 1, 19);
+        assertLayer(tile, META_LAYER, 4096, 1, 18);
     }
 
     private String getHttpMethod() {

x-pack/plugin/vector-tile/src/main/java/org/elasticsearch/xpack/vectortile/feature/FeatureFactory.java

@@ -15,6 +15,7 @@
 import com.wdtinc.mapbox_vector_tile.build.MvtLayerParams;
 import com.wdtinc.mapbox_vector_tile.build.MvtLayerProps;
 
+import org.elasticsearch.common.geo.SphericalMercatorUtils;
 import org.elasticsearch.geometry.Circle;
 import org.elasticsearch.geometry.Geometry;
 import org.elasticsearch.geometry.GeometryCollection;

x-pack/plugin/vector-tile/src/main/java/org/elasticsearch/xpack/vectortile/feature/SimpleFeatureFactory.java

@@ -8,6 +8,7 @@
 package org.elasticsearch.xpack.vectortile.feature;
 
 import org.apache.lucene.util.BitUtil;
+import org.elasticsearch.common.geo.SphericalMercatorUtils;
 import org.elasticsearch.common.io.stream.BytesStreamOutput;
 import org.elasticsearch.geometry.Point;
 import org.elasticsearch.geometry.Rectangle;