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4

From the url documentation: You can allow some spacing around the breakable characters by assigning \Urlmuskip = 0mu plus 1mu (with mu units because of math mode). In your case it seems to don't suffice, so you can try with: \Urlmuskip=0mu plus 2mu MWE: \documentclass[a4paper,11pt]{book} \usepackage[T1]{fontenc} ...

3

This was done on a smaller scale for a map of Hawaii using a 20x20 grid. For the final version you set the opacity of the map to 1. I find using a checkerboard background helps when aligning links to the map. Using a \parbox instead of tikz \matrix is much faster. I stole the map from http://www.enchantedlearning.com/usa/states/hawaii/map.GIF and ...

3

\url comes from package url (loaded by hyperref). \urlstyle configures the font. The same font: \urlstyle{same} This means, no special font is set and the current font is used for the URL. Other pre-defined styles: \urlstyle{rm}: The font \rmfamily is used. \urlstyle{sf}: The font \sffamily is used. \urlstyle{tt}: This is the default: \ttfamily. See ...

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