A complete, automatic and flexible orthographic localisator for Wikipedia maps.
var bb = { "item":"India", "W": 67.0, "N":37.5, "E": 99.0, "S": 5.0 },
localisator("body", 200, bb.item, bb.W, bb.N, bb.E, bb.S);It take as input :
- a JS selector: a target html element’s selector such as
"body","#hook", to be appended to, - a width (px),
- the item name (string),
- four geocoordinates (decimal degrees), representing the bounding box ordered as West, North, East, South.
The style approximate most recent Wikipedia localisator map guidelines.
-en.svg){kind=link}
The first issue was to move away from straight lines to correctly curved lines.
The second issue was to support bounding boxes upon the 180⁰ meridians. Boxes upon the 180th meridian need special management. By example, localising a set of pacific islands between 155⁰ East and -155 West initially gives….
…with correct rotation (+180⁰) :
… and with correct boxing:
Localisator now perfect, enjoy !
![enter image description here][7] [7]: http://i.stack.imgur.com/Vc0qK.png
For technical details, see code and D3.geo : Spherical arcs rather than straight lines for paralles?. For deeper documentation, see D3.geo and bounding boxes.