HI, I am having difficulty printing a high resolution, minimum 300 DPI, map. OSM maps are 72 dpi. I have tried working with Photoshop but to get the DPI above 300 the picture becomes enormous. I am looking to map street maps for a book, at most 3" by 5" in size. Thanks

HI, I am having difficulty printing a high resolution, minimum 300 DPI, map. OSM maps are 72 dpi. I have tried working with Photoshop but to get the DPI above 300 the picture becomes enormous. I am looking to map street maps for a book, at most 3" by 5" in size. Thanks