Add gpx2geojson.sh

1 files changed, 48 insertions, 0 deletions

diff --git a/tools/gpx/gpx2geojson.sh b/tools/gpx/gpx2geojson.sh
new file mode 100755
index 0000000..eefcf5e
--- /dev/null
+++ b/tools/gpx/gpx2geojson.sh
@@ -0,0 +1,48 @@
+#! /bin/bash
+
+<$1 xq '.gpx |
+  (
+    label $out |
+    if .wpt != null then [.wpt] else break $out end |
+    flatten[] |
+    {
+      type: "Feature",
+      properties: { name: .name },
+      geometry: {
+        type: "Point",
+        coordinates: [
+          (.["@lon"]|tonumber),
+          (.["@lat"]|tonumber),
+          (.ele | if . == null then null else tonumber end)
+        ]
+      }
+    }
+  ),
+  (
+    label $out |
+    if .trk != null then [.trk] else break $out end |
+    flatten[] |
+    {
+      type: "Feature",
+      properties: { name: .name },
+      geometry: {
+        type: "MultiLineString",
+        coordinates:
+          [.trkseg] | flatten | map(
+            .trkpt | map(
+              [
+                (.["@lon"]|tonumber),
+                (.["@lat"]|tonumber),
+                (.ele | if . == null then null else tonumber end)
+              ]
+            )
+          )
+      }
+    }
+  )
+' | jq -s '
+  {
+    type: "FeatureCollection",
+    features: .
+  }
+'