Handle NaN nodata

test/rendering/cases/cog-f32-nodata-explicit-nan/main.js

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+import GeoTIFF from '../../../../src/ol/source/GeoTIFF.js';
+import Map from '../../../../src/ol/Map.js';
+import TileLayer from '../../../../src/ol/layer/WebGLTile.js';
+
+const source = new GeoTIFF({
+  sources: [{url: '/data/raster/elevation-f32.tif', nodata: NaN}],
+});
+
+new Map({
+  layers: [
+    new TileLayer({
+      source: source,
+    }),
+  ],
+  target: 'map',
+  view: source.getView(),
+});
+
+render({
+  message: 'normalize i16 data with nan nodata based on GDAL stats',
+});

test/rendering/cases/cog-f32-nodata/main.js

@@ -0,0 +1,21 @@
+import GeoTIFF from '../../../../src/ol/source/GeoTIFF.js';
+import Map from '../../../../src/ol/Map.js';
+import TileLayer from '../../../../src/ol/layer/WebGLTile.js';
+
+const source = new GeoTIFF({
+  sources: [{url: '/data/raster/elevation-f32.tif'}],
+});
+
+new Map({
+  layers: [
+    new TileLayer({
+      source: source,
+    }),
+  ],
+  target: 'map',
+  view: source.getView(),
+});
+
+render({
+  message: 'normalize i16 data with nan nodata based on GDAL stats',
+});

test/rendering/cases/cog-i16-nodata/main.js

@@ -0,0 +1,21 @@
+import GeoTIFF from '../../../../src/ol/source/GeoTIFF.js';
+import Map from '../../../../src/ol/Map.js';
+import TileLayer from '../../../../src/ol/layer/WebGLTile.js';
+
+const source = new GeoTIFF({
+  sources: [{url: '/data/raster/elevation-i16.tif'}],
+});
+
+new Map({
+  layers: [
+    new TileLayer({
+      source: source,
+    }),
+  ],
+  target: 'map',
+  view: source.getView(),
+});
+
+render({
+  message: 'normalize i16 data with -9999 nodata based on GDAL stats',
+});