fix(lambda-tiler): ensure wmts limits extent to the bounding box of the tile matrix extent BM-1012

packages/lambda-tiler/src/__tests__/wmts.capability.test.ts

@@ -229,6 +229,86 @@ describe('WmtsCapabilities', () => {
     );
   });
 
+  it('should limit a bounding box to the tileMatrix extent WebMercatorQuad', () => {
+    const wmts = new WmtsCapabilities({ httpBase: 'https://basemaps.test', apiKey });
+
+    const bigImagery = new Map();
+    bigImagery.set(Imagery3857.id, {
+      ...Imagery3857,
+      bounds: {
+        // These bounds are slightly outside the extent bounds of 3857 (approx 0.3m offset)
+        // expected bounds: {x: -20037508.34 y:-20037508.34, width: 40075016.6855784 , height: 40075016.6855784 }
+        x: -20037508.6276,
+        y: -20037508.6276,
+        width: 40075016.9626,
+        height: 40075014.197799996,
+      },
+    });
+
+    wmts.fromParams({
+      provider: Provider,
+      tileMatrix: [GoogleTms],
+      tileSet: TileSetAerial,
+      imagery: bigImagery,
+      formats: ['png'],
+    });
+    const raw = wmts.toVNode();
+
+    const wgs84 = raw.find('Contents', 'Layer', 'ows:WGS84BoundingBox');
+    const epsg3857 = raw.find('Contents', 'Layer', 'ows:BoundingBox');
+
+    assert.equal(
+      epsg3857?.find('ows:LowerCorner')?.toString(),
+      `<ows:LowerCorner>-20037508.3428 -20037508.3428</ows:LowerCorner>`,
+    );
+    assert.equal(
+      epsg3857?.find('ows:UpperCorner')?.toString(),
+      `<ows:UpperCorner>20037508.3428 20037508.3428</ows:UpperCorner>`,
+    );
+
+    assert.equal(wgs84?.find('ows:LowerCorner')?.toString(), '<ows:LowerCorner>-180 -85.051129</ows:LowerCorner>');
+    assert.equal(wgs84?.find('ows:UpperCorner')?.toString(), '<ows:UpperCorner>180 85.051129</ows:UpperCorner>');
+  });
+
+  it('should limit a bounding box to the tileMatrix extent NZTM2000Quad', () => {
+    const wmts = new WmtsCapabilities({ httpBase: 'https://basemaps.test', apiKey });
+    const bigImagery = new Map();
+
+    bigImagery.set(Imagery2193.id, {
+      ...Imagery2193,
+      bounds: {
+        // These bounds are slightly outside the extent bounds of NZTM2000Quad (approx 0.3m offset)
+        x: -3260586.9214,
+        y: 419435.7552,
+        width: 10018754.086099999,
+        height: 10018754.086099999,
+      },
+    });
+
+    wmts.fromParams({
+      provider: Provider,
+      tileMatrix: [Nztm2000QuadTms],
+      tileSet: TileSetAerial,
+      imagery: bigImagery,
+      formats: ['png'],
+    });
+    const raw = wmts.toVNode();
+
+    const wgs84 = raw.find('Contents', 'Layer', 'ows:WGS84BoundingBox');
+    const crsBounds = raw.find('Contents', 'Layer', 'ows:BoundingBox');
+    assert.equal(
+      crsBounds?.find('ows:LowerCorner')?.toString(),
+      `<ows:LowerCorner>419435.9938 -3260586.7284</ows:LowerCorner>`,
+    );
+    assert.equal(
+      crsBounds?.find('ows:UpperCorner')?.toString(),
+      `<ows:UpperCorner>10438190.1652 6758167.443</ows:UpperCorner>`,
+    );
+
+    assert.equal(wgs84?.find('ows:LowerCorner')?.toString(), '<ows:LowerCorner>-180 -49.929855</ows:LowerCorner>');
+    assert.equal(wgs84?.find('ows:UpperCorner')?.toString(), '<ows:UpperCorner>180 2.938603</ows:UpperCorner>');
+  });
+
   it('should include output the correct TileMatrix', () => {
     const wmts = new WmtsCapabilities({
       httpBase: 'https://basemaps.test',
@@ -512,11 +592,12 @@ describe('WmtsCapabilities', () => {
         .split('\n')
         .map((c) => c.trim()),
     );
+
     assert.deepEqual(boundingBox[0][1], '<ows:LowerCorner>-180 -85.0511</ows:LowerCorner>');
-    assert.equal(boundingBox[0][2], '<ows:UpperCorner>180 0</ows:UpperCorner>');
+    assert.equal(boundingBox[0][2], '<ows:UpperCorner>180 85.0511</ows:UpperCorner>');
 
     assert.deepEqual(boundingBox[1][1], '<ows:LowerCorner>-180 -85.0511</ows:LowerCorner>');
-    assert.equal(boundingBox[1][2], '<ows:UpperCorner>180 0</ows:UpperCorner>');
+    assert.equal(boundingBox[1][2], '<ows:UpperCorner>180 85.0511</ows:UpperCorner>');
   });
 
   it('should work with NZTM2000Quad', () => {

packages/lambda-tiler/src/wmts.capability.ts

@@ -94,18 +94,25 @@ export class WmtsBuilder {
   }
 
   buildWgs84BoundingBox(tms: TileMatrixSet, layers: Bounds[]): VNodeElement {
-    let bbox: BBox;
+    let bbox: BBox | null = null;
+
     if (layers.length > 0) {
       let bounds = layers[0];
       for (let i = 1; i < layers.length; i++) {
         bounds = bounds.union(layers[i]);
       }
-      bbox = wgs84Extent(tms, bounds.toJson());
-    } else {
-      // No layers provided assume extent is the size of the tile matrix set :shrug: ?
-      bbox = wgs84Extent(tms, tms.extent);
+
+      // If imagery is outside of the bounds of the tileMatrix, fall back to the tileMatrix extent for the bounds
+      if (!tms.extent.containsBounds(bounds)) {
+        bbox = wgs84Extent(tms, tms.extent);
+      } else {
+        bbox = wgs84Extent(tms, bounds);
+      }
     }
 
+    // No layers provided assume extent is the size of the tile matrix set :shrug: ?
+    if (bbox == null) bbox = wgs84Extent(tms, tms.extent);
+
     // If east is less than west, then this has crossed the anti meridian, so cover the entire globe
     if (bbox[2] < bbox[0]) {
       bbox[0] = -180;
@@ -120,7 +127,7 @@ export class WmtsBuilder {
 
   /** Combine all the bounds of the imagery inside the layers into a extent for the imagery set */
   buildBoundingBoxFromImagery(tms: TileMatrixSet, layers: ConfigLayer[]): VNodeElement | null {
-    let bounds;
+    let bounds: Bounds | null = null;
     for (const layer of layers) {
       const imgId = layer[tms.projection.code];
       if (imgId == null) continue;
@@ -131,7 +138,11 @@ export class WmtsBuilder {
     }
     if (bounds == null) return null;
 
+    // If imagery is outside of the bounds of the tileMatrix, fall back to the tileMatrix extent for the bounds
+    if (!tms.extent.containsBounds(bounds)) bounds = tms.extent;
+
     const bbox = bounds.toBbox();
+
     return V('ows:BoundingBox', { crs: tms.projection.toUrn() }, [
       V('ows:LowerCorner', formatBbox(bbox[tms.indexX], bbox[tms.indexY], MeterPrecision)),
       V('ows:UpperCorner', formatBbox(bbox[tms.indexX + 2], bbox[tms.indexY + 2], MeterPrecision)),

packages/smoke/src/base.ts

@@ -30,7 +30,19 @@ async function req(path: string, opts?: RequestInit): Promise<Response> {
   const res = await fetch(target, opts);
 
   // eslint-disable-next-line no-console
-  console.log({ url: target.href, status: res.status, ...opts, duration: performance.now() - startTime }, 'Fetch:Done');
+  console.log(
+    // Create a fake log line approximating the pino log format
+    JSON.stringify({
+      pid: 0,
+      time: new Date().toISOString(),
+      level: 30,
+      msg: 'Fetch:Done',
+      url: target.href,
+      status: res.status,
+      ...opts,
+      duration: performance.now() - startTime,
+    }),
+  );
   return res;
 }
 

packages/smoke/src/wmts.test.ts

@@ -28,13 +28,23 @@ test(`GET /v1/tiles/aerial/WebMercatorQuad/WMTSCapabilities.xml`, async () => {
 
   assert.ok(
     xml.includes(
-      `<ows:BoundingBox crs="urn:ogc:def:crs:EPSG::3857"><ows:LowerCorner>-20037508.3428 -20037508.3428</ows:LowerCorner><ows:UpperCorner>20037508.3428 20037508.3428</ows:UpperCorner></ows:BoundingBox>`,
+      [
+        `<ows:BoundingBox crs="urn:ogc:def:crs:EPSG::3857">`,
+        `<ows:LowerCorner>-20037508.3428 -20037508.3428</ows:LowerCorner>`,
+        `<ows:UpperCorner>20037508.3428 20037508.3428</ows:UpperCorner>`,
+        `</ows:BoundingBox>`,
+      ].join(''),
     ),
   );
 
   assert.ok(
     xml.includes(
-      `<ows:WGS84BoundingBox crs="urn:ogc:def:crs:OGC:2:84"><ows:LowerCorner>-180 -85.051129</ows:LowerCorner><ows:UpperCorner>180 85.051129</ows:UpperCorner></ows:WGS84BoundingBox>`,
+      [
+        `<ows:WGS84BoundingBox crs="urn:ogc:def:crs:OGC:2:84">`,
+        `<ows:LowerCorner>-180 -85.051129</ows:LowerCorner>`,
+        `<ows:UpperCorner>180 85.051129</ows:UpperCorner>`,
+        `</ows:WGS84BoundingBox>`,
+      ].join(''),
     ),
   );