how to give path file to show the path in google maps?

how to give path file to show the path in google maps?

References

Reference NO 1

http://stackoverflow.com/questions/15189163/how-to-give-path-file-to-show-the-path-in-google-maps

Reference NO 2

http://stackoverflow.com/questions/2643993/how-to-display-a-route-between-two-geocoords-in-google-maps

Reference NO 3

http://www.sitepoint.com/find-a-route-using-the-geolocation-and-the-google-maps-api/

Reference NO 4

https://developers.google.com/maps/documentation/javascript/elevation

Reference NO 5

http://www.google.com/earth/outreach/tutorials/custommaps.html

Reference NO 6

http://www.texas811.org/public/userfiles/pdfs/Viewing_and_creating_KMZ_or_KML_files.pdf

Reference NO 7

http://www.daftlogic.com/projects-advanced-google-maps-distance-calculator.htm

Reference NO 8

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