Physical limits
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 Feature: Physical limits
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| Description |
| Tagging the physical restrictions of a feature. |
| Tags |
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Keys ending in *:physical=* represent actual physical limits (as opposed to legally defined limits).
For example, where maxwidth=* represent the legal width limit for a feature (such as the one shown on a traffic sign), maxwidth:physical=* represents the actual maximum width. Both can be tagged on the same feature — the latter tends to have a larger value (except in places with really bad traffic signs) — but *:physical=* occurs on its own as well.
Tags representing physical limitations
| Description | Legal | Physical |
|---|---|---|
| Maximum width | maxwidth=* |
maxwidth:physical=*
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| Maximum height | maxheight=* |
maxheight:physical=*
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| Maximum length | maxlength=* |
maxlength:physical=*
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| Maximum diameter | maxdiameter:physical=*
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Keys like maxwidth:physical=* can in turn be used as a key suffix in combinations like sidewalk:left:maxwidth:physical=* (which describes the physical maximum width for the left-hand sidewalk of a street).