Idea: making bat-detector surveys visible on a map, using software for reducing time consuming work on the data. Minimal costs should make it possible for everyone to create such maps.
Implementation: a software for an obsolete (but still working) Palm PDA allows it to store observations with just a single touch. During the survey a GPS receiver is writing an automatic track-log. A PC-based software later combines the observer-log and the track-log, interpolating the GPS position of each observation.
<Placemark> <name>pnat</name> <description>fp, 2.4.11 18:26:23, hunt, 1</description> <Point><coordinates>10.0659890379757, 54.3437119759619</coordinates> </Point></Placemark> <Placemark> <name>ppip</name> <description>fp, 2.4.11 18:27:19, hunt, 1</description> <Point><coordinates>10.0678700208664, 54.3447950016707</coordinates> </Point></Placemark>
KML-file data being displayed on a map
the Palm application
Windows-software with sample files: otl-windows.zip
- otl-demo.txt – sample data (recorded by Palm application)
- demo.gpx – track-log (recorded by Garmin GPS)
- parsegpx.rb – conversion software (ruby source)
- parsegpx.exe – executable conversion software
- demo.kml – resulting KML-file
Command line call: parsegpx.exe -o otl-demo.txt -t demo.gpx -k demo.kml
Without Google Maps the data can be viewed in a browser by visiting this website: http://display-kml.appspot.com/
Update: I figured out how to display the data as overlay on Open Street Map (and will publish the software soon). Example: OSM-Karte