bash scipt to execute gpsbabel simplifyy on all .gpx files in directory

place script.sh in same directory as gpx files to be simplified

then run

bash script.sh

uses gpsbabel to simplify and thus reduce the number of trackpoints of a track in gpx files.

to-dos:

• include a security hook for very small files.
• add more gpsbabel manipulations: eg remove duplicates, merge segements,
• allow enter key for confirmation
• make sure that fraction userinput is an integer
• allow for spaces in filenames