Add MN sales tax layers

layers/mn-sales-tax/index.js

@@ -0,0 +1,45 @@
+import GeoJSON from 'ol/format/GeoJSON.js';
+import VectorLayer from 'ol/layer/Vector.js';
+import VectorSource from 'ol/source/Vector.js';
+
+import history from './data/history.js';
+
+import { Fill, Stroke, Style, Text } from 'ol/style.js';
+
+
+function style(feature){
+    return new Style({
+        text: new Text({
+            text: feature.get('NameLabel') + ': ' + feature.get('TotalFrmal'),
+        }),
+        fill: new Fill({
+            color: 'rgba(255,255,255,0.4)',
+        }),
+        stroke: new Stroke({
+            color: '#008800',
+            width: 1.25,
+        }),
+    });
+}
+
+const layers = {
+    name: "Minnesota Sales Tax",
+    layers: [],
+};
+
+for (let [name, url] of Object.entries(history)) {
+    const layer = new VectorLayer({
+        source: new VectorSource({
+            url,
+            format: new GeoJSON,
+        }),
+        style: style,
+    });
+
+    layers.layers.push({
+        name,
+        layer,
+    });
+}
+
+export default layers;