Take the 2-minute tour ×
Geographic Information Systems Stack Exchange is a question and answer site for cartographers, geographers and GIS professionals. It's 100% free, no registration required.

I'm quite new to GDAL and to the remote sensing world so sorry in advance if I say something silly :-) What I would like to do is to assign from scratch the EPSG 3857 System Of Reference to a Bing tile (a not georeferenced jpg) downloaded from the Bing server. I've already computed the coordinates [x, y] this tile should have in the 3857 SoR and create a world file from them, but how can I now project my tile to 3857 by using this .tfw?

enter image description here

Thank you so much in advance!

Martina

share|improve this question
add comment

1 Answer

If you have the tfw calculated thats 90% of your work done. You should simply rename tfw to jgw (which is what its supposed to be called when its put together with jpg file), and the software should be able to recognize it.

Theres no need for further reprojection because bing i think also uses spherical mercator projection, which is also known as google projection (hence the other EPSG code for it: 900913) or as you know it, under EPSG: 3857

share|improve this answer
    
thank you for your answer! The problem is that I need to project the tile to 3857 because I shall match this tile on a source image which is in the Google/Bing 3857 projection; the tile orientation changes in the Bing system of reference (it is tilted). Unfortunately I do not only need to read the coordinates.. help! :-) –  user123892 Oct 10 '12 at 10:44
    
can you post a screenshot, just so we're sure we are on the same page :) –  U2ros Oct 10 '12 at 11:09
    
? Did I miss something? –  user123892 Oct 10 '12 at 12:54
    
No, im just curious, because you say you have a tile from bing maps. You georeferenced it (created tfw file) and now you have some mismatch. –  U2ros Oct 10 '12 at 12:55
    
unfortunately I cant upload images to the answer because I dont have 10 reputation.. Anyway the screenshot shall be visible here postimage.org/image/3nsha0kt1 tell me if anything goes wrong! –  user123892 Oct 10 '12 at 13:13
show 7 more comments

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.