Factor out ‘resolutions’ array.

And limit it to 8 meter / pixel since that's the highest resolution of
Lantmäteriet's “Topografisk Webbkarta Visning, översiktlig” (open data)
product.

https://www.lantmateriet.se/globalassets/geodata/geodatatjanster/tb_twk_visning-oversiktlig_v1.0.3.pdf

1 files changed, 5 insertions, 4 deletions

diff --git a/main.js b/main.js
index c0d0dfb..f5cf41a 100644
--- a/main.js
+++ b/main.js
@@ -92,11 +92,11 @@ const baseMapSource = new WMTS({
   format: 'image/png',
   tileGrid: new WMTSTileGrid({
     extent: extent,
-    // https://www.lantmateriet.se/globalassets/geodata/geodatatjanster/tb_twk_visning_cache_v1.1.0.pdf
+    // https://www.lantmateriet.se/globalassets/geodata/geodatatjanster/tb_twk_visning-oversiktlig_v1.0.3.pdf
     tileSize: 256,
     origin: [-1200000, 8500000],
-    resolutions: [4096, 2048, 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 1, .5],
-    matrixIds: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13],
+    resolutions: [4096, 2048, 1024, 512, 256, 128, 64, 32, 16, 8],
+    matrixIds: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9],
   }),
   projection: projection,
   wrapX: false,
@@ -104,6 +104,7 @@ const baseMapSource = new WMTS({
 });
 
 
+const resolutions = [1024, 512, 256, 128, 64, 32, 16, 8];
 const view = new View({
   projection: projection,
   extent: extent,
@@ -112,7 +113,7 @@ const view = new View({
   center: [694767.48, 7338176.57],
   zoom: 1,
   enableRotation: false,
-  resolutions: [1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 1, .5],
+  resolutions: resolutions,
   constrainResolution: false,
 });