Fyrimynd:Location map Fiji/doc
Hetta er ein dokumentatión undirsíða til Fyrimynd:Location map Fiji. Hon inniheldur kunning um nýtsluna, bólkar og um annað innihald, ið ikki er við í uppruna fyrimynd síðuni. |
Template:Location map Fiji is a location map definition used to overlay markers and labels on an equirectangular projection map of Fiji. The markers are placed by latitude and longitude coordinates on the default map or a similar map image.
Usage
[rætta wikitekst]These definitions are used by the following templates when invoked with parameter "Fiji":
{{Location map | Fiji | ...}}
{{Location map many | Fiji | ...}}
{{Location map+ | Fiji | ...}}
{{Location map~ | Fiji | ...}}
Map definition
[rætta wikitekst]- name
- used in default map caption (Fiji)
- image
- the default map image, without "Image:" or "File:" (Fiji location map.svg)
- x
- an expression to calculate a location on the map via its longitude; 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 latitude; evaluates as 0 along the top edge and 100 along the bottom edge
Technical details
[rætta wikitekst]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 | -12.3 | 174.4 | (0,-0) | (0,0) |
top/right | -12.3 | -177.9 | (100,-0) | (100,0) |
bottom/left | -21.8 | 174.4 | (0,100) | (0,100) |
bottom/right | -21.8 | -177.9 | (100,100) | (100,100) |
center | -17.05 | 178.25 | (50,50) | (50,50) |
Examples
[rætta wikitekst]Location map: Eastern hemisphere, Deg/Min/Sec coordinates
[rætta wikitekst]{{Location map | Fiji | width = 150 | caption = Location of [[Eori]] in Fiji | label = Eori | background = lightblue | position = left | lat_deg= 17 | lat_min=26 | lat_sec=17 | lat_dir=S | lon_deg=177 | lon_min=03 | lon_sec=48 | lon_dir=E }}
Location map: Eastern hemisphere, Decimal coordinates
[rætta wikitekst]{{Location map | Fiji | width = 150 | caption = Location of [[Eori]] in Fiji | label = Eori | background = lightblue | position = left | lat = -17.43806 | long = 177.06333 }}
Location map: Western hemisphere, Deg/Min/Sec coordinates
[rætta wikitekst]{{Location map | Fiji | width = 150 | caption = Location of [[Batiki]] in Fiji | label = Batiki | background = lightgreen | position = bottom | lat_deg = 17 | lat_min = 47 | lat_sec = | lat_dir = S | lon_deg = 179 | lon_min = 09 | lon_sec = | lon_dir = W }}
Location map: Western hemisphere, Decimal coordinates
[rætta wikitekst]{{Location map | Fiji | width = 150 | caption = Location of [[Batiki]] in Fiji | label = Batiki | background = lightgreen | position = bottom | lat = -17.783 | long = -179.15 }}
Location map many: Deg/Min/Sec coordinates
[rætta wikitekst]{{Location map many | Fiji | width = 150 | caption = [[Eori]] and [[Batiki]] in Fiji | label = Eori | label_size = 90 | bg = lightblue | pos = left | lat_deg = 17 | lat_min = 26 | lat_sec = 17 | lat_dir = S | lon_deg =177 | lon_min = 03 | lon_sec = 48 | lon_dir = E | label2 = Batiki | label2_size = 90 | bg2 = lightgreen | pos2 = bottom | lat2_deg = 17 | lat2_min = 47 | lat2_sec = | lat2_dir = S | lon2_deg =179 | lon2_min = 09 | lon2_sec = | lon2_dir = W }}
Location map many: Decimal coordinates
[rætta wikitekst]{{Location map many | Fiji | width = 150 | caption = [[Eori]] and [[Batiki]] in Fiji | label = Eori | label_size = 90 | bg = lightblue | pos = left | lat = -17.43806 | long = 177.06333 | label2 = Batiki | label2_size = 90 | bg2 = lightgreen | pos2 = bottom | lat2 = -17.783 | long2 = -179.15 }}