SVG and Google/Mapbox/Yandex Maps

    Hi all,
    I am developing a vehicle tracking system with svg and various maps like google maps, mapbox etc. as background image. I am stuck at some point and can not get any progress. At start, due to i have not enough knowledge about cartography i thought projection was unimportant and even if i do not take projection of lat/long i would get similar values. So i skipped this process and did zoom in feature with changing viewport parameters then put google maps as background image. Program does zoom in with a some error. I mean my lat/long values does not match with google maps. First i thought it was because of precision but i think i have more serious problems like scaling the svg canvas. I know google maps take lat/long projecton automatically but i can not make connection this information with my project. At this point i am confused about steps that i should fallow about this particular problem and about further progress. Can you guided me if you had similar problems or any ideas about this situation? Any piece of information would be very helpful.
    Thanks for your help.