Update default view.

Use Lantmäteriet's 'topowebb_nedtonad' basemap, and show some layers.
This is more or less what's being linked to at
https://www.klimatanalysnorr.se/kartor-2/ .

For existing links to the old non-hierarchical names, we simply use the
default view instead of trying to map layer names to the new ones.

2 files changed, 29 insertions, 2 deletions

diff --git a/example.html b/example.html
index 5dd0e01..67e8300 100644
--- a/example.html
+++ b/example.html
@@ -15,7 +15,7 @@
         man välja lager, ladda ner kartan som PNG-fil, och få information om
         de olika föremålen.</p>
       </div>
-      <iframe id="map" src="/#z=0&basemap=topowebb_nedtonad&layers=svk_lines+svk_pylons+svk_stations+svk_planned+mrr_appr_ec+mrr_appl_ec+mrr_appr_ogd+mrr_appl_ogd+mrr_appr_met+mrr_appl_met+mrr_appr_dl+mrr_appr_pc+vbk_area_current+vbk_station_completed+vbk_station_processed+vbk_station_approved+gigafactories" title="Webbkarta"></iframe>
+      <iframe id="map" src="/" title="Webbkarta"></iframe>
     </div>
   </body>
 </html>
diff --git a/main.js b/main.js
index 4c424db..d857899 100644
--- a/main.js
+++ b/main.js
@@ -119,7 +119,7 @@ const view = new View({
   constrainResolution: false,
 });
 
-let baseMapLayer = 'topowebb';
+let baseMapLayer = 'topowebb_nedtonad';
 (function() {
   const params = new URLSearchParams(window.location.hash.substring(1));
   const x = parseFloat(params.get('x'));
@@ -131,6 +131,33 @@ let baseMapLayer = 'topowebb';
   if (!isNaN(z)) {
     view.setZoom(z);
   }
+  if (params.has('layers')) {
+    const layers = params.get('layers').split(' ');
+    if (layers.length > 0 && !layers.some((l) => l.includes('.'))) {
+      /* compat redirect/layer subst for old non-hierachical names */
+      params.delete('layers');
+    }
+  }
+  if (!params.has('layers')) {
+    params.set('layers', [
+        'svk.ledningar',
+        'svk.stolpar',
+        'svk.stationer',
+        'svk.transmissionsnatsprojekt',
+        'misc.gigafactories',
+        'misc.dammar',
+        'mrr.appr_ec',
+        'mrr.appl_ec',
+        'mrr.appr_ogd',
+        'mrr.appl_ogd',
+        'mrr.appr_met',
+        'mrr.appl_met',
+        'mrr.appr_dl',
+        'vbk.area_current',
+        'vbk.area_notcurrent',
+      ].join(' '));
+    location.hash = '#' + params.toString();
+  }
 
   if (params.has('basemap')) {
     baseMapLayer = params.get('basemap');