many thanks for the quick reply. I did realize that this blog did not include UTM – but once I got WGS84 geographic I should manage to further convert to UTM. it is the part Web Mercator – WGS84 that I need. I don’t understand what x and y are, i.e. what the units are. The information I get when downloading a bing map is also lat /lon in degrees but x and y seem to be much larger numbers if I convert lat lon from Mercator WGS84 to Web Mercator. ]]>

No part of this article is related to UTM projection – it’s about converting from WGS84 geographic coordinates to Web Mercator projected coordinates. If you want to convert to one of the UTM zones I recommend you use GDAL.

]]>I am one of those users that just need a map transformation as a one off without knowing enough about projections. I need to transform a bing map into utm.

Feeling very stupid – but in the two sets of formulas you provided, what are x and y? they are too large for conversion factors, too large for being lat/long in wgs84, and not correct for being x and y in utm…

Sorry for the stupid question, but your help is much appreciated, thanks! ]]>