Wikipedia:Using maps and analogous media: Difference between revisions
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*It is not uncommon for companies that publish a yearly edition of a map to use a year for an edition number that is a year ahead of when the map was actually drafted. In such cases, it is not uncommon for cartographers to draw projects as completed that were still under construction or being proposed when the map was drafted, as an effort to compensate for the discrepancy in the dates. This can introduce another source of error in an otherwise reliable map, should a project be cancelled or significantly changed. Such errors can be detected by comparing multiple editions of the same map.
*Any cultural bias apparent in a map (such as a disputed boundary or a territory claimed by two entities) should be clearly explained in a neutral fashion.
*Editors who use maps should be aware that maps covering large areas almost always have one type of distortion or another, depending on the [[map projection]] used. Care should be taken to select a map whose projection is appropriate for the purpose to which it is being put
==Illustration==
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