Question: I am developing an iPhone app. here in my App I have included Google maps.I am showing the highlighted path in map.

Now my Question is how to calculate distance between two point as per path as Apple"s native map App is showing routes with distance. 

Thanks in Advance.

Answer: 
On Ubuntu, [`sf2extract`](http://manpages.ubuntu.com/manpages/bionic/man1/sf2extract.1.html) in the `gigtools` package can extract all the samples from an SF2 file as WAVs.
Import your sf file into audacity as Import>Raw Data.

You can then export it as an audio file such a wav or mp3

I got some new audio patches that were sf2 and my composition software didn't recognise them. Did an internet search and came up with nothing. So I did this audacity thing and it worked for me. Specifically to what you asked, my file was a trumpet playing a scale of notes. I deleted all notes but the first and exported that single note. I copied the export (wav) into my soundbank folder and was able to compose in different pitches with via one small file. And now... about 30 other instruments to apply this to!