diff --git a/GPS/geojson2csv.rb b/GPS/geojson2csv.rb
new file mode 100755
index 0000000..8551fb9
--- /dev/null
+++ b/GPS/geojson2csv.rb
@@ -0,0 +1,23 @@
+#!/usr/bin/env ruby
+# Usage: $0 data/*.geojson
+
+require 'json'
+require 'csv'
+
+header = "name,lon1,lat1,lon2,lat2,lon3,lat3\n"
+csv = CSV.generate(header, headers: true) do |c|
+  ARGV.each do |file|
+    json = JSON.parse(open(file){|f|f.read})
+    name = json["_umap_options"]["name"]
+    coords = []
+    json["features"].each do |f|
+      g = f["geometry"]
+      if g["type"] == "Point"
+        coord = g["coordinates"]
+        coords += coord
+      end
+    end
+    c << [name] + coords
+  end
+end
+puts csv