In your case for doupling the resotution you must first request more pixels by using the same BBOX but &width=200&height=200. Now without using the DPI setting printing softwares would print a bigger image for you and keep the default resolotion. By doubling the DPI setting a DPI aware program will print the image in the original size but with double resolution.
-Jukka Rahkonen-
krwoloq
I'm running the latest nightly build and I can't get the format_options=DPI working. No matter what I input, I always get the same image size...
Yeah I totally missinterpreted the meaning. I though if I use a bigger DPI, the image would automatically be resized. But the DPI is actually used, as far as I can see - for styling, labeling, etc…To keep them coherent with the image size. So I have to increase the image size manually through a request. My mistake…
In your case for doupling the resotution you must first request more pixels by using the same BBOX but &width=200&height=200. Now without using the DPI setting printing softwares would print a bigger image for you and keep the default resolotion. By doubling the DPI setting a DPI aware program will print the image in the original size but with double resolution.