در حال ویرایش الگو:روی نقشه/توضیحات (بخش)

==Design issues==
Each of the mapper templates named as "Location_map_XX" (such as {{tl|Location_map_Africa}}) contains a map-image name, latitude range, longitude range, or x/y skew factors, as the details hidden by data [[encapsulation (computer science)]]. Some mapper templates treat latitude/longitude as straight lines ([[Mercator projection]]s), whereas other mappers have skew factors for maps with curved lines. Hence, each of those templates is not a "fork" of {{tl|Location map}} but instead, they are [[accessor function]]s which access the map-border coordinates or skew-factors as shared data, rather than being repeated data in each article using {{tl|Location map Italy}}. If Italy officially changes its map borders, then only that one mapper template need be changed, and only those Italy-related articles will be reformatted. The total of 20,000+ articles using {Location_map} will NOT be reformatted when someone updates each particular "Location_map_XX" and so the impact on Wikipedia server work is reduced, as roughly 450 times faster, by having 450 separate mapper templates.