Module:Location map/data/Kiribati/doc

Template:Location map Kiribati is a location map definition used to overlay markers and labels on an equirectangular projection map of Kiribati. It is used by "Template:Location map" when invoked with parameter "Kiribati": {{Location map | Kiribati | ...}}. The markers are placed by latitude and longitude coordinates on the default map or a similar map image.

[[Image:Template:Location map/data/Kiribati|left|thumb|300px|Location map for Template:Location map/data/Kiribati]]

Map parameters
name	Template:Location map/data/Kiribati	name used in default map caption
image	Template:Location map/data/Kiribati	file name of map image, without "Image:" or "File:"
x	Template:Location map/data/Kiribati	an expression which evaluates as 0 along the left edge of the map, and 100 along the right edge of the map, where {{{2}}} and {{{3}}} are the degrees latitude and longitude respectively.
y	Template:Location map/data/Kiribati	an expression which evaluates as 0 along the top edge of the map, and 100 along the bottom edge of the map, where {{{2}}} and {{{3}}} are the degrees latitude and longitude respectively.

Usage

For a description of the parameters, see {{Location map}} and {{Location map many}}.

Location map: Eastern hemisphere, Deg/Min/Sec coordinates

South Tarawa

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Location of South Tarawa in Kiribati

{{Location map | Kiribati
| width = 250 | float = right
| caption = Location of [[South Tarawa]] in Kiribati
| label = South Tarawa
| background = lightblue
| position = right
| lat_deg= 01 | lat_min=19 | lat_sec=32 | lat_dir=N
| lon_deg=172 | lon_min=59 | lon_sec=00 | lon_dir=E
}}

Location map: Eastern hemisphere, Decimal coordinates

South Tarawa

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Location of South Tarawa in Kiribati

{{Location map | Kiribati
| width = 250 | float = right
| caption = Location of [[South Tarawa]] in Kiribati
| label = South Tarawa
| background = lightblue
| position = right
| lat = 1.32556
| long = 172.9833333
}}

Location map: Western hemisphere, Deg/Min/Sec coordinates

Kiritimati

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Location of Kiritimati in Kiribati

{{Location map | Kiribati
| width = 250 | float = right
| caption = Location of [[Kiritimati]] in Kiribati
| label = Kiritimati
| background = lightgreen
| position = bottom
| lat_deg= 01 | lat_min=52 | lat_sec= | lat_dir=N
| lon_deg=157 | lon_min=24 | lon_sec= | lon_dir=W
}}

Location map: Western hemisphere, Decimal coordinates

Kiritimati

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Location of Kiritimati in Kiribati

{{Location map | Kiribati
| width = 250 | float = right
| caption = Location of [[Kiritimati]] in Kiribati
| label = Kiritimati
| background = lightgreen
| position = bottom
| lat = 1.867
| long = -157.4
}}

Location map many: Deg/Min/Sec coordinates

South Tarawa

Kiritimati

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South Tarawa and Kiritimati in Kiribati

{{Location map many | Kiribati
| width = 250 | float = right
| caption = [[South Tarawa]] and [[Kiritimati]] in Kiribati
| label = South Tarawa | label_size = 90
| bg = lightblue | pos = right
| lat_deg= 01 | lat_min=19 | lat_sec=32 | lat_dir=N
| lon_deg=172 | lon_min=59 | lon_sec=00 | lon_dir=E
| label2 = Kiritimati | label2_size = 90
| bg2 = lightgreen | pos2 = bottom
| lat2_deg= 01 | lat2_min=52 | lat2_sec= | lat2_dir=N
| lon2_deg=157 | lon2_min=24 | lon2_sec= | lon2_dir=W
}}

Location map many: Decimal coordinates

South Tarawa

Kiritimati

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South Tarawa and Kiritimati in Kiribati

{{Location map many | Kiribati
| width = 250 | float = right
| caption = [[South Tarawa]] and [[Kiritimati]] in Kiribati
| label = South Tarawa | label_size = 90
| bg = lightblue | pos = right
| lat = 1.32556
| long = 172.9833333
| label2 = Kiritimati | label2_size = 90
| bg2 = lightgreen | pos2 = bottom
| lat2 = 1.867
| long2 = -157.4
}}

Technical details

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	6	169	(,)	(0,0)
top/right	6	-149	(,)	(100,0)
bottom/left	-13	169	(,)	(100,0)
bottom/right	-13	-149	(,)	(100,100)
center	-3.5	-170	(,)	(50,50)