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WP:OGC

This page lists ways to obtain and add geographic coordinates to articles.

Obtaining

There are various ways to obtain geographic coordinates. Note that regardless of the source of coordinates, it is a good practice to evaluate whether they appear reasonable at first glance.

From maps

From printed maps

Looking at a printed map or atlas, either those you own or at a library.

From online maps

Wikipedia compatible geotagging metadata generators

List of services, directly providing Wikipedia/Wikimedia Commons compatible geotagging metadata.

Currently preferred geotagging templates are: {{coord...}} for English Wikipedia and {{location...}} or {{location dec..}} for Wikimedia Commons.

Tool	Type	Metadata types	Coordinate parameters	Description	Licensing
GeoLocator (project page)	Google Maps based	`{{coord}}`, `{{location}}`, `{{location dec}}`, microformats, custom editable template	type, scale, region, heading	Coordinate picker and online metadata authoring tool. Features: visual heading (camera direction) picker, GeoTemplate/GeoHack compatibility, flexible coordinate parser, URL integration, configurable degree/arcsec precision. Metadata roundtrip support – pasting of existing geotag, updating its location or parameters and encoding new one.
Coordinates tool	Google Maps based	`{{Coor title dms (NL)}}`, `{{Coördinaten (NL)}}`, `{{Location (Commons)}}`, `{{Object location (Commons)}}`, `{{Coord (EN))}}`, `{{Infobox decimaal}}`, `{{Infobox)}}`	type, scale, region	Coordinate picker and online metadata authoring tool. Features: GeoTemplate/GeoHack compatibility.

Generic web-based services

These services are web based, and provide online methods for obtaining coordinates.

Be sure to read the licensing information carefully so that data providers receive an appropriate attribution.

Tool	Type	Description
Getlatlong	Map to coordinates	Move a marker on a Google Maps map (map or satellite view) and get Latitude, Longitude for the location. User interface in English language.
Mapcoordinates	Map to coordinates	Move a marker on a Google Maps map (map or satellite view) and get Latitude, Longitude and Elevation for the location. User interface in German language.
NASA World Wind	Maps	Open source 3D interactive world viewer. See also: online version Licensing: NOSA
Bing Maps	Maps	Provides geographical coordinates of a location when a "Pushpin" has been created. Find the feature or the location you want to know the geographical coordinates of, either by manually using the map and zooming in, or by entering a place name or address into the search field. Right-click on the map at the site where you want the pushpin to appear. A pop-up tab will appear. Select Add a Pushpin and save it. Several icons are found to the lower left of the map, including a star for "My Places" and also an email icon. Click the Star to open "My Places". Select the most recent place which you have just saved. Click the email icon. The geographical coordinates are embedded in the email link which is then displayed. The coordinates are the two numbers displayed immediately after the letters "cp=". The latitude and longitude are separated by a tilde ( ~ ). The latitude is displayed first, and both coordinates are displayed in decimal degrees format. (in degrees only). Alternatively, any of the locations in My Places can be exported either as a KML file or GPX file, both of which embed the coordinates. Export is done by clicking the Actions tab at the top of the My Places box. The degrees-only geographical coordinates can be entered into Wikipedia's {{coord}} template. In the preview, click on the template and you will get to the Map sources page. There, the degrees-only geographical coordinates are converted into degrees-minutes-seconds anyway and displayed automatically at the top of the page, so you can still decide if you want to convert the degrees-only-geographical coordinates into the degree-minutes-seconds-format (alternatively, you can also use the website http://id.mind.net/~zona/mmts/trigonometryRealms/degMinSec/degMinSec.htm for the conversion from degrees-only into degree-minutes-seconds). Licensing: Proprietary EULA
WikiMapia	Global browser	The latitude and longitude of the crosshairs are given at the bottom left of the screen and are constantly updated as the map is moved. Clicking on them will bring up a dialog box from which they can be copied in decimal or deg/min/sec form. Licensing: Arieal imagery provided is from Google Earth Terms of use and one can switch to Bing Maps and OpenStreetMap as needed
Calculators	Conversion	Many scientific calculators (including the one that comes with Windows, use dms and inv dms) can convert coordinates.
The Getty Thesaurus of Geographic Names	Name search	Allows you to find coordinates with a place name search. Licensing: [1]
Geonet Names Server (GNS)	Name search	U.S. National Geospatial-Intelligence Agency (NGA) maintains a comprehensive database of non-U.S. place data.
The Libre Map Project		The purpose of the project is to aggregate and make digital maps and related GIS data available for free. Licensing: CC-BY-SA 2.0
GPSies.com	Google Maps tool	Gives coordinates for places, names, elevation/height above sea level on Google Maps (reverse geocoding). You can download the coordinate as GPX Waypoint, PCX5 Waypoint, LOC Geocache or Google Earth KML.
GeocodeFarm	Address & coordinate search	Look up address by coordinates or coordinates by address. Forward and Reverse Geocoding Service. Web Form or API Available. API is free for 2,500 queries per day, more are paid. Web Form is free for unlimited queries. International Coverage in most countries. Licensing: [2]
Great Circle Mapper	Name search	Has geographic coordinates for airports, heliports, and other facilities which have an IATA or ICAO code. You can also search by location name.
Plexscape WS	Google Maps tool – Coordinate converter	Online application to acquire coordinates for any place on Earth. Supports more than 3,000 coordinate systems and 400 datums worldwide. Place pushpins on the map and calculates automatically the coordinates in the selected coordinate system or datum. Perform transformation between coordinate systems and/or datums. Extended units list available for calculations (meters, feet etc.)

Google Maps

Google Maps can be used to find coordinates 3 different ways, although many other sites make use of Google imagery with specialist overlays.

The simplest way to get coordinates from Google Maps is to right-click on the desired location and click "What's here?". The coordinates are now shown in the search box.
Coordinates can also be extracted from generated links with the following procedure. First locate the place you require coordinates for, and double click on it to centre the map around that point. Then click "Link" at the top of the map, and the coordinates (in degrees and parts of a degree in decimals) appear in the address bar, e.g. "https://maps.google.co.uk/?ll=51.455558,-2.605047&spn=0.032304,0.069523". In this case the latitude is 51.455558, and the longitude is -2.605047. The reverse is possible by entering the lat and long into the search bar, with a space between them.
Copying the coordinates from the URL can be made easier with a Javascript-supporting browser, by adding any of the following bookmarklets (create a new bookmark with this code as the URL):
- There is a wiki-coords bookmarklet, maintained in GitHub.
- The following bookmarklet will create an output such as {{coord|51.5030515|-0.1281352}}:
  javascript: (function () { var matches = location.toString().match("\/maps\/.*@([0-9.-]+),([0-9.-]+)"); prompt('',"{{coord|" + matches[1] + "|" + matches[2] + "}}"); }());
- The following bookmarklet will create an output such as {{coord|51|30|10.99|N|0|07|41.29|W|display=title}}:
  javascript:var matches = location.toString().match("\/maps\/.*@([0-9.-]+),([0-9.-]+)");coord=[matches[1],matches[2]];output='{{coord|';for(x in [0,1]){neg=(coord[x]<0);coord[x]=Math.abs(coord[x]);deg=Math.floor(coord[x]);minr=(coord[x]-deg)*60;min=Math.floor(minr);sec=Math.floor((minr - min)*60*100000)/100000;output+=deg+"|"+(min<10?'0':'')+min+"|"+(sec<10?'0':'')+sec.toFixed(2)+'|'+(x==0?(neg?'S|':'N|'):(neg?'W|':'E|')+"display=title}}");};void(prompt('Coordinates for Wikipedia',output));

To use these bookmarklets, centre the map on the desired point and then open the newly created bookmark. A coordinate template text will appear, ready to be pasted to Wikipedia.

Google Earth

Google Earth makes it easy to search for the coordinates of any location and zooming in on them. The coordinate format can be chosen via Tools → Options → 3D View → Show Lat/Long. There are many ways to obtain coordinates:

Move the mouse pointer to where you want, then use the keyboard to select the Menu item Edit → Copy View Location to copy the coordinates to the clipboard. More convenient is the associated keyboard shortcut. If it is not provided in the currently chosen language of Google Earth, change it to English (UK) (Tools → Options → General → Language settings).
Move the mouse pointer to where you want, and note the coordinates displayed on the bottom of the earth display window. The numbers will have to be written from the screen manually, but this does let you choose an appropriately rounded value, without excess precision, for the location you're capturing.
Center the screen on your location by double-clicking on it, then use the View in Google Maps button at the top (Google Earth 4.1 and newer). This will open Google Maps within Google Earth. You can see the center coordinates in decimal format in the address bar, but unfortunately you cannot copy them directly. To do so, use the button Open this page in your default web browser to display the same Google Maps page in your browser with unrestricted access to its address bar. Of course, all the methods listed above for Google Maps are also available.
Center the screen on your location by double-clicking on it, then create a placemark (Add Placemark-button or Menu Add → Placemark. The "New Placemark" window displays the coordinates.
For the coordinates of an existing placemark, right click on it on the sidebar and select "Copy". This makes the clipboard hold a KML ("Keyhole Markup Language") description of the placemark. Since KML is XML, it's easily manipulable. Towards the bottom of the placemark is a tag <coordinates>...</coordinates> which contains the long/lat coordinates in decimal degrees. Note that the order of the coordinates is lon/lat; you may want to swap the both in order to get the more common lat/lon notation. Also note that the precision is ridiculously high; you'll probably want to trim it down.
Install the Google Earth version of the hjl_get_Coor tool: Ald-Hjl-Koord-en.kmz. Once it's installed, a crosshair icon appears in the middle of the Google Earth screen. Move the view so that the crosshair is on your desired location, and then click on it. There is a link to the hjl_get_Coor tool, which gives the coordinates back in your chosen wiki markup that can be copied and pasted to an article.
The exported kml or kmz file can also be converted to templates using the kmlconvert tool.

OpenStreetMap

OpenStreetMap can be used. For convenience, close any open sidebar (to allow a simpler URL format like the one below). Simply navigate to the desired point by right-clicking on it, then select the "Centre map here" option from the dialog. Finally, extract the coordinate values from the browser URL (N.B. not the shortlink).

For example, https://www.openstreetmap.org/#map=17/10.79375/122.00671 includes a latitude of 10.79375 and a longitude of 122.00671.

A quicker alternative to extract coordinates is to right click on a desired point in the map and select "Show address". From the sidebar search results, copy the coordinates (in latitude, longitude format).

World Wind

NASA World Wind can access a large online database of U.S. and global placenames (cities, villages and other geographic & anthropogenic features). Street addresses can be found using Yahoo and Virtual Earth geocoders (works for the US, Australia, UK, Japan... and maybe some other countries). (Offline search requires this pack http://www.worldwindcentral.com/wiki/Add-on:Classic_Placenames_cache_pack) Press Ctrl-F, enter the official place name, click Search, you will probably find the place you're looking for. Click Go. (of course you can navigate to the desired spot with your mouse; select View->Show Position to see the coordinates) Press Ctrl-C to copy the decimal coordinates. Paste it into Wikipedia. Example: For Tucson International Airport → worldwind://goto/world=Earth&lat=32.11611&lon=-110.94109&alt=24389"

From directories/databases

For the US

The United States Geological Survey's public domain Geographical Names Information Service database service is extremely extensive, although riddled with errors. It also provides linkouts to topozone and terraserver so that you can tweak the results to your liking. Most of these coordinates use
US Census TIGER
US Census Boundary and Annexation Survey
Find Longitude and Latitude coordinates by US Zip Code
Search engine for GPS coordinates of latitude and longitude of the United States of America

For other regions

For placenames in Antarctica, try Geographic Names Information System, Antarctica
For placenames in Australia, try Geoscience Australia Place Name Search
For placenames in Canada, try the Canadian Geographical Names Data Base (CGNDB) Querying Canadian Geographical Names
For placenames in the UK, Streetmap.co.uk is very useful for clicking on a precise point to show the coordinates. Near the foot of a page displaying a map is a link "Click here to convert/measure coordinates" which takes you to a "Grid Conversion Results" page with the WGS84 latitude and longitude amongst other useful values.

From other sources

Using a GPS receiver with a clear view of the sky.

Looking for "Waypoint" files on sites for GPS users, e.g.

Googling for a city name together with "latitude", "longitude" will usually yield a plethora of useful results (example)

Wikidata has geocoordinates for many objects

Formats and formatting

UK places and Irish places traditionally use grid references, and a latitude /longitude system tied to an OSGB36 datum. This gives a 112 m (367 ft) difference.
The NAD83 map datum is sufficiently close to WGS84 for initial use. It is best to double check on a mapping site such as WikiMapia.
Cordinates obtained in China from commercial sources (Google, Bing, Baidu, etc.) may be obfuscated with GCJ-02 or BD-09. Vector sources are more frequently affected than satellite sources. Use this gadget to obtain deobfuscated coordinates, then double check on OpenStreetMap.

Add to article

Finally, add the coordinates to the relevant article:

To add 57°18′22″N 4°27′32″W / 57.30611°N 4.45889°W / 57.30611; -4.45889 to the top of an article, use {{Coord}}, thus:

{{Coord|57|18|22|N|4|27|32|W|display=title}}

These coordinates are in degrees, minutes, and seconds of arc.

"title" means that the coordinates will be displayed next to the article's title at the top of the page (in desktop view only; title coordinates do not display in mobile view) and before any other text or images. It also records the coordinates as the primary location of the page's subject in Wikipedia's geosearch API.

To add 44°06′45″N 87°54′47″W / 44.1124°N 87.9130°W / 44.1124; -87.9130 to the top of an article, use either

{{Coord|44.1124|N|87.9130|W|display=title}}

(which does not require minutes or seconds but does require the user to specify north/ south and east/west) or

{{Coord|44.1124|-87.9130|display=title}}

(in which the north and east are presumed by positive values while the south and west are negative ones). These coordinates are in decimal degrees.

Degrees, minutes and seconds, when used, must each be separated by a pipe ("|").
Map datum must be WGS84 if possible (except for off-Earth bodies).
Avoid excessive precision (0.0001° is <11 m, 1″ is <31 m).
Maintain consistency of decimal places or minutes/seconds between latitude and longitude.
Latitude (N/S) must appear before longitude (E/W).

Optional coordinate parameters follow the longitude and are separated by an underscore ("_"):

dim: dim:N (viewing diameter in metres)
region: region:R (ISO 3166-1 alpha-2 or ISO 3166-2 code)
type: type:T (landmark or city(30,000), for example)

Other optional parameters are separated by a pipe ("|"):

display
|display=inline (the default) to display in the body of the article only,

|display=title to display at the top of the article only (in desktop view only; title coordinates do not display in mobile view), or

|display=inline,title to display in both places.
name
name=X to label the place on maps (default is PAGENAME)

Thus: {{Coord|44.1172|-87.9135|dim:30_region:US-WI_type:event

|display=inline,title|name=accident site}}

Use |display=title (or |display=inline,title) once per article, for the subject of the article, where appropriate.

Per WP:ORDER, the template is placed at the bottom of the article in the 'end matter', after any navigation templates, but before all categories, including the {{DEFAULTSORT}} template. The {{coord}} template may also be placed within an infobox, instead of at the bottom of the article.
For full details, refer to {{Coord/doc}}.
Additional guidance is available at obtaining coordinates and converting coordinates.