Extract all into file per layer, concatenate to single file

layers/josm/extract.js

@@ -0,0 +1,62 @@
+
+const fs = require('fs');
+const path = require('path');
+const fetch = require('node-fetch');
+
+const outDir = __dirname;
+
+const includeList = [
+    "osmbe",
+    "osmbe-fr",
+    "osmbe-nl",
+    "osmfr-basque",
+    "osmfr-breton",
+    "osmfr-occitan",
+    "OpenStreetMap-turistautak",
+    "hu-hillshade",
+    "Israel_Hiking",
+    "Israel_MTB",
+    "mtbmap-no",
+    "Freemap.sk-Car",
+    "Freemap.sk-Hiking",
+    "Freemap.sk-Cyclo",
+    "opencylemap",
+    "standard",
+    "HDM_HOT",
+    "osmfr",
+    "osm-mapnik-german_style",
+    "OpenTopoMap",
+    "osm-cambodia_laos_thailand_vietnam-bilingual",
+    "Waymarked_Trails-Hiking",
+    "Waymarked_Trails-Cycling",
+    "Waymarked_Trails-MTB",
+    "wikimedia-map"
+];
+
+function extract(layersJosm) {
+    for (let i = 0; i < layersJosm.features.length; i++) {
+        let layer = layersJosm.features[i];
+        let props = layer.properties;
+        let id = props.id;
+        if (includeList.includes(id)) {
+            //console.log(`${id}, ${props.name}, ${props.url}`);
+
+            props.dataSource = 'JOSM';
+
+            const outFileName = path.join(outDir, id + '.geojson');
+            const data = JSON.stringify(layer, null, 2);
+            fs.writeFileSync(outFileName, data);
+
+            includeList.splice(includeList.indexOf(id), 1);
+        }
+    }
+
+    if (includeList.length > 0) {
+        console.warn('Layers not found: ', includeList);
+    }
+}
+
+fetch('https://josm.openstreetmap.de/maps?format=geojson')
+    .then(res => res.json())
+    .then(json => extract(json))
+    .catch(err => console.error(err));