Sizing of Road Symbols
Posted 06 November 2006 - 09:06 AM
I am making a sketch map covering a few hundred square miles at 54"x72". My client, thinking out loud, wondered if there is a standard sizing for road symbols in proportion to page size. My thought is to make them easily readable, but not clutter or distract from other features - in other words, apply standard cart design principles & personal judgement.
Posted 06 November 2006 - 09:23 AM
Posted 07 November 2006 - 12:07 AM
I think their size is dictated by the text within them, which in turn is dictated by the regular text conventions (i.e. not too small, not too big).
I second Hans. Also depends on application: larger type for a wall display with a heavy senior citizen component, smaller for a hand-held laminate designed for college students on spring break. My rule of thumb for hand-held maps is no smaller than 5 pt for highway shield type. And I have been known to break that rule down to 4 pt...
Posted 08 November 2006 - 06:19 PM
I usually use 5 pt Helvetica Bold for road symbol numbers, and allow about .013" of space around the number before the the outer shield line. The outer shield line is usually .006". The boldface is especially important if it is a reverse (white) against a darker shield for ink creep on printed maps.
Another aspect is: how many of them do you put on? My guideline is to make sure there is no confusion as to what route is what. So if there is a fork in the routes at the edge of a page, each tine gets a symbol, even if I have to arrow them in. Typically, on a 8" x 10" map I will have three symbols on vertical routes and two horizontally, and add more for clarity if the routes jump around.
Posted 08 November 2006 - 08:44 PM
mike [at] purplelizard.com
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