Thanks Kevin,
I ended up using the expression below. I modified the source.
Thank you for your help
Nabeel
eval("var state=" + footage("map.json").sourceText);
latitude = location[0]. latitude;
longitude = location[0]. longitude;
y = linear( latitude, -90, 90, 1080, 0 ) ;
x = linear( longitude, -180, 180, 0, 1920 ) ;
[ x, y ]