Extension:GeoData

The GeoData extension allows articles to specify their geographical coordinates and publishes these coordinates via the HTTP API.

Usage
This extension adds a new parser function,  , that saves coordinates to the database. Function's input format is made as compatible as possible with GeoHack.

Glossary

 * Coordinates - see here
 * Globe - terrestrial body on which the coordinate resides. By default, Earth is assumed. Internally, globe is represented as lowercase strings. The following globes are supported: earth, mercury, venus, moon, mars, phobos, deimos, ganymede, callisto, io, europa, mimas, enceladus, tethys, dione, rhea, titan, hyperion, iapetus, phoebe, miranda, ariel, umbriel, titania, oberon, triton and pluto. Globes not mentioned in this list will be assumed to have generic characteristics: longitude range 0-360°, Eastern longitude is positive. Longitude sign for known globes is taken according to IAU's conventions.
 * dim - approximate size (or size's order of magnitude) of an object. Used by GeoData to restrict search and by Geohack for determining appropriate map zoom.
 * Primary vs. secondary coordinates: primary coordinates define article subject's location, while secondary coordinates are other coordinates mentioned in the article. There can be only one primary coordinate per article, but as many secondaries as you like barring technical restrictions.

Parser function
Function format:
 *  


 * latitude and longitude can be specified in several formats:
 * Direct signed input in degrees, e.g. 37.786971|-122.399677, which corresponds to 37° 47′ 13.1″ N, 122° 23′ 58.84″ W.
 * Degrees/minutes or degrees/minutes/seconds, e.g. 37|47.2183|-122|23.9807 or 37|47|13.1|-122|23|58.84.
 * Either of the above, but with sign specified by N/E/S/W letters:
 * 37.786971|N|122.399677|W
 * 37|47.2183|N|122|23.9807|W
 * 37|47|13.1|N|-122|23|58.84|W


 * primary keyword specifies that these coordinates are primary (see ).
 * Extra parameters are any combination of the following named parameters:
 * dim: approximate size of the object.
 * scale: Scale of map display for this object, e.g. scale of 300 is 1:300. Gets converted into dim internally using formula dim = scale / 10. If both scale and dim are set, dim has precendence.
 * globe, see.
 * name: name of this point, up to 255 bytes (UTF-8).
 * region: ISO 3166-1 alpha-2 country code (e.g. US or RU) or an ISO 3166-2 region code (e.g. US-FL or RU-MOS). This parameter is always capitalised internally.
 * type: type of object with these coordinates, can be one of the following: country, satellite, state, adm1st, adm2nd, adm3rd, city, isle, mountain, river, waterbody, event, forest, glacier, airport, railwaystation, edu, pass, camera, landmark.


 * GeoHack parameters: one or more pairs in format parameter:value, delimited by underscores (_) or spaces (e.g. dim:1000_type:city</tt>). No spaces are allowed between parameter and colon or between colon and value. The parameters are the same as extra parameters above. If a parameter exists in both GeoHack parameters and extra parameters, extra parameters always have precendence. This input is needed only for compatibilty with preexisting templates - if your wiki is only designing a geographical coordinates template, it is best if you not used raw GeoHack parameters at all.

Usage
This extension adds a new parser function,

API
GeoData has two API modules that perform search around a given point and coordinates for a given article(s).

list=geosearch
Searches for articles around the given point (determined either by coordinates or by article name).

Parameters:


 * gscoord: Coordinate around which to search: two floating-point values separated by pipe (|)
 * gspage: Title of page around which to search
 * gsradius: Search radius in meters (10-10000). This parameter is required.
 * gsmaxdim: Restrict search to objects no larger than this, in meters
 * gslimit: Maximum number of pages to return. No more than 500 (5000 for bots) allowed. Default: 10.
 * gsglobe: Globe to search on (by default earth</tt>).
 * gsnamespace: Namespace(s) to search. Default: main namespace.
 * gsprop: What additional coordinate properties to return. Values (separate with '|'): type, name, country, region.
 * gsprimary: Whether to return only primary coordinates (yes</tt>), secondary (no</tt>) or both (yes|no</tt>). Default: yes</tt>.

Example:
 * Search around the point with coordinates 37° 47′ 13.1″ N, 122° 23′ 58.84″ W:
 * api.php?action=query&list=geosearch&gsradius=10000&gscoord=37.786971|-122.399677

prop=coordinates
Returns coordinates of the given page(s)

Parameters:
 * colimit: How many coordinates to return.
 * cocontinue: When more results are available, use this to continue.
 * coprop: What additional coordinate properties to return. Values (separate with '|'): type, name, country, region.
 * coprimary: Whether to return only primary coordinates (yes</tt>), secondary (no</tt>) or both (yes|no</tt>). Default: yes</tt>.

Examples:
 * Get a list of coordinates of the Wikimedia Foundation article:
 * api.php?action=query&prop=coordinates&titles=Wikimedia%20Foundation

Enumerating pages with or without coordinates
GeoData extends two core API modules, list=allpages</tt> and list=categorymembers</tt>. The extended modules are called geopages</tt> and geopagesincategory</tt>. It adds two mutually exclusive parameters, withcoordinates</tt> and withoutcoordinates</tt>.

Installation

 * 1) Download the files from SVN or download a snapshot (select your version of MediaWiki) and place the files under <tt>$IP/extensions/GeoData</tt>
 * 2) Add to the end of LocalSettings.php:
 * 3) Add the required tables to the database; on the command line, enter:  (Note: Your designated database user needs to have CREATE rights on your MediaWiki database.)
 * 4) Installation can now be verified through Special:Version on your wiki