[Maps] Use maximum grid_precision for super fine grid-resolution (#118625) (#118873)

Co-authored-by: Thomas Neirynck <[email protected]>

Author: kibanamachine

x-pack/plugins/maps/server/mvt/get_grid_tile.ts

@@ -38,7 +38,7 @@ export async function getEsGridTile({
     const path = `/${encodeURIComponent(index)}/_mvt/${geometryFieldName}/${z}/${x}/${y}`;
     const body = {
       size: 0, // no hits
-      grid_precision: 7,
+      grid_precision: 8,
       exact_bounds: false,
       extent: 4096, // full resolution,
       query: requestBody.query,

x-pack/test/api_integration/apis/maps/get_grid_tile.js

@@ -37,7 +37,7 @@ export default function ({ getService }) {
       expect(clusterFeature.id).to.be(undefined);
       expect(clusterFeature.properties).to.eql({
         _count: 1,
-        _key: '10/258/404',
+        _key: '11/517/809',
         'avg_of_bytes.value': 9252,
       });
       expect(clusterFeature.loadGeometry()).to.eql([[{ x: 87, y: 667 }]]);
@@ -97,16 +97,16 @@ export default function ({ getService }) {
       expect(gridFeature.id).to.be(undefined);
       expect(gridFeature.properties).to.eql({
         _count: 1,
-        _key: '10/258/404',
+        _key: '11/517/809',
         'avg_of_bytes.value': 9252,
       });
       expect(gridFeature.loadGeometry()).to.eql([
         [
-          { x: 64, y: 672 },
+          { x: 80, y: 672 },
           { x: 96, y: 672 },
-          { x: 96, y: 640 },
-          { x: 64, y: 640 },
-          { x: 64, y: 672 },
+          { x: 96, y: 656 },
+          { x: 80, y: 656 },
+          { x: 80, y: 672 },
         ],
       ]);
 

x-pack/test/functional/apps/maps/mvt_geotile_grid.js

@@ -98,27 +98,27 @@ export default function ({ getPageObjects, getService }) {
               'case',
               ['==', ['get', '_count'], null],
               0,
-              ['max', ['min', ['to-number', ['get', '_count']], 10], 1],
+              ['max', ['min', ['to-number', ['get', '_count']], 8], 1],
             ],
             0,
           ],
           0,
           'rgba(0,0,0,0)',
           1,
           '#ecf1f7',
-          2.125,
+          1.875,
           '#d9e3ef',
-          3.25,
+          2.75,
           '#c5d5e7',
-          4.375,
+          3.625,
           '#b2c7df',
-          5.5,
+          4.5,
           '#9eb9d8',
-          6.625,
+          5.375,
           '#8bacd0',
-          7.75,
+          6.25,
           '#769fc8',
-          8.875,
+          7.125,
           '#6092c0',
         ],
         'fill-opacity': 0.75,