scalebar – Create scalebars for maps, diagrams or photos

This is a small pack­age to cre­ate scale­bars for maps, di­a­grams or pho­tos. It was de­signed for use with cave maps but can be used for any­thing from show­ing a scale­bar in kilo­me­tres for to­po­graphic maps to a scale­bar in mi­crome­tres for an elec­tron mi­cro­scope im­age.