undropped caves code -> GPX

templates/cavesundropped.html

@@ -10,7 +10,8 @@
 
 <p>
 See <em><a href="/caves">All Caves</a></em> for all the caves in areas 1623, 1626, 1624, 1627 <br />
-See <em><a href="/caves_recent">Recent Caves</a></em> for a full list of recent caves.
+See <em><a href="/caves_recent">Recent Caves</a></em> for a full list of recent caves.<br />
+Download <em><a href="/caves_undropped_gpx" download="undropped.gpx">Undropped GPX file</a></em> (This is only the subset which are fully located.)
 
     <p style="text-align:right">
     <a href="{% url "newcave" %}">New Cave</a><br>

templates/cavesundroppedgpx.html

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gpx version="1.0" creator="troggle https://expo.survex.com/troggle" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.topografix.com/GPX/1/0" xsi:schemaLocation="http://www.topografix.com/GPX/1/0 http://www.topografix.com/GPX/1/0/gpx.xsd">
+<name>Expo undropped caves</name>
+<time>{{now}}</time>
+{% for e in ent_locations %}{{e|safe}}{% endfor %}</gpx>