الگو:Location map Tuvalu
| نام | تووالو | |||
|---|---|---|---|---|
| مختصات مرزها | ||||
| -5.3 | ||||
| 175.7 | →↕← | -179.8 | ||
| -11.0 | ||||
| وسط نقشه | ۸°۰۹′جنوبی ۱۷۷°۵۷′شرقی / ۸٫۱۵°جنوبی ۱۷۷٫۹۵°شرقی | |||
| x | (100*(({{{3}}} ({{{3}}} < 0)*360) - 175.7)/((-179.8 360) - 175.7)) | |||
| y | (100*({{{2}}} - (-5.3))/((-11.0) - (-5.3))) | |||
| تصویر | Tuvalu location map.svg
| |||
| ||||
Template:Location map Tuvalu is a location map definition used to overlay markers and labels on an equirectangular projection map of تووالو. The markers are placed by عرض جغرافیایی and طول جغرافیایی coordinates on the default map or a similar map image.
Usage
[ویرایش]These definitions are used by the following templates when invoked with parameter "Tuvalu":
{{Location map|Tuvalu |...}}{{Location map many|Tuvalu |...}}{{Location map |Tuvalu |...}}{{Location map~|Tuvalu |...}}
Map definition
[ویرایش]- name
- used in default map caption (تووالو)
- image
- the default map image, without "Image:" or "File:" (Tuvalu location map.svg)
- x
- an expression to calculate a location on the map via its طول جغرافیایی; evaluates as 0 along the left edge and 100 along the right edge
- y
- an expression to calculate a location on the map via its عرض جغرافیایی; evaluates as 0 along the top edge and 100 along the bottom edge
Technical details
[ویرایش]For a map using an equirectangular projection which does not cross /-180 longitude, or /-90 latitude, the following expressions can be used:
x = 100*(long - left)/(right - left)
y = 100*(lat - top)/(bottom - top)
where lat and long are the degrees latitude and longitude respectively. Here, top and bottom are the degrees latitude of the top and bottom edges of the map, left and right are the degrees latitude of the left and right edges of the map.
Things are a bit more complicated when the map crosses /-180 longitude, and some sort of "modulo arithmetic" is required. Here, we add 360 if the longitude is less than 0, then use a mapping based on positive coordinates. The following table can be used to check if the expressions are working as desired:
| location | lat | long | (x,y) test | (x,y) exact |
|---|---|---|---|---|
| top/left | -5.3 | 175.7 | (0,-0) | (0,0) |
| top/right | -5.3 | -179.8 | (100,-0) | (100,0) |
| bottom/left | -11.0 | 175.7 | (0,100) | (0,100) |
| bottom/right | -11.0 | -179.8 | (100,100) | (100,100) |
| center | -8.15 | 177.95 | (50,50) | (50,50) |
Examples
[ویرایش]Location map: Eastern hemisphere, Deg/Min/Sec coordinates
[ویرایش]
{{Location map | Tuvalu
| width = 150
| caption = [[نانومئا]] in Tuvalu
| label = Nanumea
| lat_deg= 05 | lat_min=41 | lat_sec= | lat_dir=S
| lon_deg=176 | lon_min=12 | lon_sec= | lon_dir=E
| background = lightblue
| position = right
}}
Location map: Eastern hemisphere, Decimal coordinates
[ویرایش]{{Location map | Tuvalu
| width = 150
| caption = [[نانومئا]] in Tuvalu
| lat = -5.683
| long = 176.2
| label = Nanumea
| background = lightblue
| position = right
}}
Location map: Western hemisphere, Deg/Min/Sec coordinates
[ویرایش]{{Location map | Tuvalu
| width = 150
| caption = Coordinates on Tuvalu map
| lat_deg= 10 | lat_min=15 | lat_sec= | lat_dir=S
| lon_deg=179 | lon_min=59 | lon_sec= | lon_dir=W
| label = 10°15′S 179°59′W
| background = lightgreen
| position = left
}}
Location map: Western hemisphere, Decimal coordinates
[ویرایش]{{Location map | Tuvalu
| width = 150
| caption = Coordinates on Tuvalu map
| lat = -10.25
| long = -179.983333
| label = -10.25, -179.983333
| background = lightgreen
| position = left
}}