Add MN Adventure Trails

layers/index.js

@@ -19,6 +19,7 @@ import trips from './trips/index.js';
 import dot_cams from './dot-cams/index.js';
 import survey_markers from './survey-markers/index.js';
 import tjx from './tjx/index.js';
+import minnesotaAdventureTrails from './minnesota-adventure-trails/index.js';
 
 const layerCategories = [
     { // Base maps
@@ -90,6 +91,7 @@ const layerCategories = [
             },
         ]
     },
+    minnesotaAdventureTrails,
     survey_markers,
     dot_cams,
     trips,

layers/minnesota-adventure-trails/.gitignore

@@ -0,0 +1,2 @@
+*.kmz
+routes.js

layers/minnesota-adventure-trails/get_data.sh

@@ -0,0 +1,28 @@
+#!/bin/sh
+
+# SEMAT: https://www.google.com/maps/d/u/0/viewer?mid=1fd5DwCNSTNyd2ijSa3FcKTXfn85wFD8
+# NEMAT: https://www.google.com/maps/d/u/0/viewer?mid=19EWOYHcIlO9HX3Xwc6peFxMwdhsEt78
+# NCMAT: https://www.google.com/maps/d/u/0/viewer?mid=1qtnoqH2w_E4QT8rDYStKw_S1TWI-cRw
+
+cd $(dirname $0)
+
+for file in *.kmz; do
+    zcat "$file" | ogr2ogr -f GeoJSON "$(basename "$file" .kmz).geojson" /vsistdin/ -skipfailures
+done
+
+# hack hack hack
+truncate -s 0 routes.js
+i=0
+for file in ./*.geojson; do
+    echo "import _file$i from '$file?url';" >> routes.js
+    i=$((i+1))
+done
+echo >> routes.js
+echo "export default {" >> routes.js
+i=0
+for file in ./*.geojson; do
+    basename=$(basename "$file" .geojson)
+    echo "    \"$basename\": _file$i," >> routes.js
+    i=$((i+1))
+done
+echo "};" >> routes.js

layers/minnesota-adventure-trails/index.js

@@ -0,0 +1,40 @@
+import VectorLayer from 'ol/layer/Vector';
+import {Vector as VectorSource} from 'ol/source.js';
+import GeoJSON from 'ol/format/GeoJSON.js';
+
+import {Style, Stroke} from 'ol/style.js';
+
+import data from './routes.js';
+
+const trails = {
+    name: "Minnesota Adventure Trails",
+    details: `<a href="https://minnesotaadventuretrails.com/">https://minnesotaadventuretrails.com/</a>`,
+    layers: [],
+};
+
+for (let [chain, url] of Object.entries(data)) {
+    const colors = '0,0,0';
+    const vectorLayer = new VectorLayer({
+        source: new VectorSource({
+            url: url,
+            format: new GeoJSON,
+        }),
+        style: function(feature, resolution){
+            return new Style({
+                stroke: new Stroke({
+                    color: `rgba(${colors},${Math.min(1, Math.pow(resolution/10, 1/4))})`,
+                    width: 10/Math.pow(resolution, 1/4),
+                })
+            });
+        },
+    });
+
+    trails.layers.push({
+        name: chain,
+        layer: vectorLayer,
+    });
+}
+
+trails.layers.sort((a, b) => a.name > b.name ? 1 : -1); // Names are always unique
+
+export default trails;