Convert pixel location to latitude/longitude & vise versa

Question

I need to convert latitude longitude values into pixel positions as well as do the opposite. I\'ve found many solutions to go from lat/lng->pixel, but can\'t find anything on th

Answer 1

var y = Math.round(((-1 * lat) + 90) * (this.MAP_HEIGHT / 180));
var x = Math.round((lng + 180) * (this.MAP_WIDTH / 360));

Use some algebra and I came out with:

var lat=(y/(this.MAP_HEIGHT/180)-90)/-1
var lng = x/(this.MAP_WIDTH/360)-180

Not completely confident in that math since it was done in my head, but those should work, just make sure to test them first.