Add time data to KML output

main.py

@@ -98,7 +98,8 @@ def buildGPX(data):
 
 def buildKML(data):
  output = """<?xml version="1.0" encoding="UTF-8"?>
-<kml xmlns="http://www.opengis.net/kml/2.2">
+<kml xmlns="http://www.opengis.net/kml/2.2"
+     xmlns:gx="http://www.google.com/kml/ext/2.2">
  <Document>
   <Placemark>
    <ExtendedData>
@@ -110,16 +111,15 @@ def buildKML(data):
     <Data name="fill"><value>#00ff00</value></Data>
     <Data name="fill-opacity"><value>0.4980392156862745</value></Data>
    </ExtendedData>
-<LineString>
-<coordinates>
-"""
+   <gx:Track>"""
 
  for row in data:
-  output += "%s,%s,%s " % (row["lon"], row["lat"], row["alt"] or "0")
+  output += """
+    <when>%s</when>
+    <gx:coord>%s %s %s</gx:coord>""" % (row["ts"].isoformat(), row["lon"], row["lat"], row["alt"] or "0")
 
  output += """
-</coordinates>
-</LineString>
+   </gx:Track>
   </Placemark>
  </Document>
 </kml>