Nodyn:Coord
This is a candidate to have a transwiki guide. Due to the complexity of the project or template, this guide will help editors adapt it to a remote wiki when this cannot be done by simply copying the codes of one single template. If you know this template syntax very well, feel free to start the guide in Nodyn:Coord/Transwiki guide. Once the transwiki guide page is complete, replace this tag by {{Transwiki guide}}. |
Uses Lua: |
Quick guide
[golygu cod]Quick how to
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I ychwanegu 57°18′22.5″N 4°27′32.7″W / 57.306250°N 4.459083°W i frig erthygl, defnyddio
Mae'r cyfesurynnau hyn yn raddau, munudau, ac eiliadau arc. |
I ychwanegu 44°06′43″N 87°54′47″W / 44.112°N 87.913°W i frig erthygl, defnyddio naill ai
neu
Mae'r cyfesurynnau mewn graddau degol. |
|
Optional coordinate parameters follow the longitude and are separated by an underscore ("_"):
Other optional parameters are separated by a pipe ("|"):
Thus:
|
|
Purpose
[golygu cod]{{Coord}} provides a standard notation for encoding locations by their latitude and longitude coordinates. It is primarily for specifying the WGS84 geographic coordinates of locations on Earth, at the same time emitting a machine-readable Geo microformat. However, it can also encode locations on natural satellites, dwarf planets, and planets other than Earth.
- To specify celestial coordinates, use {{Sky}} instead.
- Tag articles which lack coordinates (but need them) with {{Coord missing}}.
- If the subject's location is truly unknown or disputed, note this with {{coord unknown}}.
See also Wikipedia:WikiProject Geographical coordinates.
Features
[golygu cod]Latitude and longitude may be specified (with appropriate precision) either in decimal notation or as degrees/minutes/seconds. By default, coordinates appear in the format used to specify them. However, the format=
parameter can be used to force display in a particular format.
The template displays the formatted coordinates with a hyperlink to GeoHack. GeoHack displays information customized to the location, including links to external mapping services.
For terrestrial locations, a blue globe () appears to the left of the hyperlink. Clicking on the globe activates the WikiMiniAtlas (requires JavaScript).
By default, coordinates appear "in line" with the adjacent text. However, the display=
parameter can be used to move the coordinates up near the page title—or display them in both places at once.
The template outputs coordinates in three formats:
- Degree/minutes/seconds ("DMS", precision is degrees, or degrees/minutes, or degrees/minutes/seconds, based on input precision).
- Decimal degrees (varying the number of decimal places based on input precision)
- A machine readable Geo microformat.
Logged-in users can customize how coordinates appear in their browsers.
Caveats
[golygu cod]The template must not be modified without prior discussion.
Tools which read Wikipedia database dumps (such as Google Earth) often ignore inline coordinates. To ensure that coordinates are seen by these tools, one set should be displayed beside the title. See How do I get my Wikipedia article to show up in the Google Earth Geographic Web layer?. However, if multiple title coordinates appear on a single page, they will overlap, making them illegible.
Superseded templates
[golygu cod]This single template supersedes {{coor d}}, (and others in that family which have since been redirected to it), plus the Geolinks and Mapit templates. Most parameters can be used as before – see Usage.
Examples:
{{coord|10.2|N|-20.3|E|type:city}} | Replaces {{coor d|10.2|N|-20.3|E|city}} |
{{coord|44.4|-111.1|type:city_region:US|display=inline,title}} | Replaces {{Geolinks-US-cityscale|44.4|-111.1}} |
{{coord|51.01234|-1.56789|type:landmark_region:GB|display=inline,title}} | Replaces {{Geolinks-UK-buildingscale|51.01234|-1.56789}} |
{{coord|-35.5|150.1|type:landmark_region:AU|display=inline,title}} | Replaces {{Mapit-AUS-suburbscale|lat=-35.5|long=150.1}} |
{{coord|12|34|12|N|45|33|45|W|display=title}} | Replaces {{CoorHeader|12|34|12|N|45|33|45|W}} |
Usage
[golygu cod]{{coord|latitude|longitude|coordinate parameters|template parameters}} {{coord|dd|N/S|dd|E/W|coordinate parameters|template parameters}} {{coord|dd|mm|N/S|dd|mm|E/W|coordinate parameters|template parameters}} {{coord|dd|mm|ss|N/S|dd|mm|ss|E/W|coordinate parameters|template parameters}}
The hemisphere identifiers (N/S) and (E/W), if used, must be adjacent to the enclosing pipe "|
" characters, and cannot be preceded or succeeded by spaces.
There are two kinds of parameters, all optional:
- Coordinate parameters are parameters that {{Coord}} passes to the map server. These have the format parameter:value and are separated from each other by the underscore character ( _ ). The supported coordinate parameters are dim:, globe:, region:, scale:, source:, and type:. See coordinate parameters for details and examples.
- Template parameters are parameters used by the {{Coord}} template. These have format parameter=value and are separated from each other by the pipe character ( | ). The supported template parameters are display=, format=, name=, and notes=.
- display= can be one of the following:
display=inline
– Display the coordinate inline (default)display=title
– Display the coordinate at the top of the article, beside the article's title (replaces {{coor title dms}} family)- shortcut:
display=t
- shortcut:
display=inline,title
– Display the coordinate both inline and beside the article's title (replaces {{coor at dms}} family)- shortcut:
display=it
- shortcut:
display=title,inline
has the same effect asdisplay=inline,title
- Note: the
title
attribute indicates that the coordinates apply to the entire article, and not just one of (perhaps many) places mentioned in it — so it should only be omitted in the latter case.
- format= can be used to force dec or dms coordinate display.
format=dec
reformats the coordinates to decimal degrees format.format=dms
reformats the coordinates to degrees | minutes | seconds format.
- name= can be used to annotate inline coordinates for display in map services such as the WikiMiniAtlas. If omitted, the article's title (PAGENAME) is assumed.
- Note: a name= parameter causes {{Coord}} to emit an hCard microformat using that name, even if used within an existing hCard. Do not use when the name is that of a person (e.g for a gravesite), as the generated hCard would be invalid. Also, do not use square brackets in names.
- notes= specifies text to be displayed immediately following the coordinates. This is primarily intended for adding footnotes to coordinates displayed beside the title.
Displaying all coordinate links on one map
[golygu cod]The template {{GeoGroup}} can be used in an article with coordinates. This template creates links to mapping services which display all the coordinates on a single map, and links to other services which allow the coordinates to be used or downloaded in a variety of formats.
Examples
[golygu cod]{{coord|43.651234|-79.383333}}
|
43°39′04″N 79°23′00″W / 43.651234°N 79.383333°W | Toronto – Fully decimal – western hemisphere implied by negation |
{{coord|43.65|-79.38}}
|
43°39′N 79°23′W / 43.65°N 79.38°W | Toronto – low precision decimal |
{{coord|43.6500|-79.3800}}
|
43°39′00″N 79°22′48″W / 43.6500°N 79.3800°W | Toronto – medium precision decimal with trailing zeroes |
{{coord|43.651234|N|79.383333|W}}
|
43°39′04″N 79°23′00″W / 43.651234°N 79.383333°W | Toronto – high precision decimal with explicit hemisphere notation |
{{coord|43|29|N|79|23|W}}
|
43°29′N 79°23′W / 43.483°N 79.383°W | Toronto – degrees & minutes |
{{coord|43|29|4|N|79|23|0|W}}
|
43°29′4″N 79°23′0″W / 43.48444°N 79.38333°W | Toronto – degrees, minutes & seconds |
{{coord|43|29|4.5|N|79|23|0.5|W}}
|
43°29′4.5″N 79°23′0.5″W / 43.484583°N 79.383472°W | Toronto – degrees, minutes, seconds & fractions of seconds |
{{coord|55.752222|N|37.615556|E}}
|
55°45′08″N 37°36′56″E / 55.752222°N 37.615556°E | Moscow – N & E |
{{coord|55.752222|N|37.615556|E|format=dms}}
|
55°45′08″N 37°36′56″E / 55.752222°N 37.615556°E | Convert to dms format |
{{coord|39.098095|-94.587307|format=dms}}
|
39°05′53″N 94°35′14″W / 39.098095°N 94.587307°W | Decimal conversion without N/S/E/W |
{{coord|55.752222|N|37.615556|E|format=dec|name=Moscow}}
|
55°45′08″N 37°36′56″E / 55.752222°N 37.615556°E | Convert to decimal and label on some maps |
{{coord|33|55|S|18|25|E}}
|
33°55′S 18°25′E / 33.917°S 18.417°E | Cape Town – S & E |
{{coord|35|00|N|105|00|E}}
|
35°00′N 105°00′E / 35.000°N 105.000°E | People's Republic of China |
{{coord|22|54|30|S|43|14|37|W}}
|
22°54′30″S 43°14′37″W / 22.90833°S 43.24361°W | Rio – S & W |
{{coord|22|S|43|W}}
|
22°S 43°W / 22°S 43°W | A degree confluence. |
{{coord|52|28|N|1|55|W|region:GB_type:city|notes=<ref>{{cite web|url=http://www.fallingrain.com/world/UK/0/Birmingham.html|title=Birmingham}}</ref>|display=inline,title}}
|
52°28′N 1°55′W / 52.467°N 1.917°W[1]Cyfesurynnau: 52°28′N 1°55′W / 52.467°N 1.917°W[1] | Birmingham – with display, notes, and parameter settings; note that these coordinates are also displayed at the top of this page. |
References
[golygu cod]Coordinate parameters
[golygu cod]The first unnamed parameter following the longitude is an optional string of coordinate parameters, separated by underscores. These parameters help GeoHack select suitable map resources, and they will become more important when Wikimaps becomes fully functional.
type:T
[golygu cod]The type:
parameter specifies the type of location for reverse mapping (for instance, to select a marker icon in the WikiMiniAtlas).
It also sets the map scale, which can however be overridden by dim: or scale:.
Valid types are:
T | Description | Map scale |
---|---|---|
adm1st | Administrative unit of country, 1st level (province, state), see table, e.g. U.S. states | 1:1,000,000 |
adm2nd | Administrative unit of country, 2nd level, see table, e.g. county (United States) | 1:300,000 |
adm3rd | Administrative unit of country, 3rd level, see table | 1:100,000 |
airport | airports and airbases | 1:30,000 |
city(pop) | cities, towns, villages, hamlets, suburbs, subdivisions, neighborhoods, and other human settlements (including unincorporated and/or abandoned ones) with known population Please replace pop with a number. Commas in pop will be ignored. There should be no blanks. |
1:30,000 ... 1:300,000 |
city | cities, towns, villages, hamlets, suburbs, subdivisions, neighborhoods, and other human settlements (including unincorporated and/or abandoned ones) with unspecified population These are treated as minor cities. |
1:100,000 |
country | (e.g. "type:country") | 1:10,000,000 |
edu | schools, colleges, and universities | 1:10,000 |
event | one-time or regular events and incidents that occurred at a specific location, including battles, earthquakes, festivals, and shipwrecks | 1:50,000 |
forest | forests and woodlands | 1:50,000 |
glacier | glaciers and icecaps | 1:50,000 |
isle | islands and isles | 1:100,000 |
landmark | buildings (including churches, factories, museums, theatres, and power plants but excluding schools and railway stations), caves, cemeteries, cultural landmarks, geologic faults, headlands, intersections, mines, ranches, roads, structures (including antennas, bridges, castles, dams, lighthouses, monuments, and stadiums), tourist attractions, valleys, and other points of interest | 1:10,000 |
mountain | peaks, mountain ranges, hills, submerged reefs, and seamounts | 1:100,000 |
pass | mountain passes | 1:10,000 |
railwaystation | stations, stops, and maintenance areas of railways and trains, including railroad, metro, rapid transit, underground, subway, elevated railway, etc. | 1:10,000 |
river | rivers, canals, creeks, brooks, and streams, including intermittent ones | 1:100,000 |
satellite | geo-stationary satellites | 1:10,000,000 |
waterbody | bays, fjords, lakes, reservoirs, ponds, lochs, loughs, meres, lagoons, estuaries, inland seas, and waterfalls | 1:100,000 |
camera | To indicate the location of where a specific image was taken. This type is used by coordinate templates on File pages. | 1:10,000 |
Default scale: if no type is used or the type is not defined in the GeoHack extension | 1:300,000 |
T | Markup | Result |
---|---|---|
waterbody | {{coord|46|43|N|7|58|E|type:waterbody}} | 46°43′N 7°58′E / 46.717°N 7.967°E |
scale:N
[golygu cod]The scale:
parameter specifies the desired map scale as 1:N, overriding the scale implied by any type: parameter.
GeoHack uses scale:
to select a map scale for a 72 dpi computer monitor. If no dim:
, type:
, or scale:
parameters are provided, GeoHack uses its default scale of 1:300,000.
Subject | Scale | Markup | Result |
---|---|---|---|
Big Ben | 1:500 | {{coord|51.500611|N|0.124611|W|scale:500}} | 51°30′02″N 0°07′29″W / 51.500611°N 0.124611°W |
Palace of Westminster | 1:5,000 | {{coord|51.5006|N|0.1246|W|scale:5000}} | 51°30′02″N 0°07′29″W / 51.5006°N 0.1246°W |
City of Westminster | 1:50,000 | {{coord|51.501|N|0.125|W|scale:50000}} | 51°30′04″N 0°07′30″W / 51.501°N 0.125°W |
Greater London | 1:500,000 | {{coord|51.50|N|0.12|W|scale:500000}} | 51°30′N 0°07′W / 51.50°N 0.12°W |
dim:D
[golygu cod]The dim:
parameter defines the diameter of a viewing circle centered on the coordinate. While the default unit of measurement is metres, the km
suffix may be appended to indicate kilometres.
GeoHack uses
dim:
to select a map scale such that the viewing circle appears roughly 10 centimetr (4 mod) in diameter on a 72 dpi computer monitor. If no dim:
, type:
, or scale:
parameters are provided, GeoHack uses its default viewing circle of 30 cilometr (19 mi).
Samples
Subject
View diameter
Markup
Result
Western Hemisphere
10,000 cilometr (6,200 mi)
{{coord|0|N|90|W|dim:10000km}}
0°N 90°W / 0°N 90°W
Ohio
400 cilometr (250 mi)
{{coord|40.5|-82.5|dim:400km}}
40°30′N 82°30′W / 40.5°N 82.5°W
Dresden
20,000 metr (12 mi)
{{coord|51.033|13.73|dim:20000}}
51°01′59″N 13°43′48″E / 51.033°N 13.73°E
Statue of Liberty
100 metr (330 tr)
{{coord|40.6892|-74.0445|dim:100}}
40°41′21″N 74°02′40″W / 40.6892°N 74.0445°W
region:R
[golygu cod]
The region:
parameter specifies the political region for terrestrial coordinates. It is used to select appropriate map resources. If no region:
parameter is provided, GeoHack attempts to determine the region from the coordinates.
The region should be supplied as either a two character ISO 3166-1 alpha-2 country code or an ISO 3166-2 region code.
Examples of ISO 3166-1 alpha-2 codes:
- AQ Antarctica
- AU Australia
- BR Brazil
- DE Germany
- GB United Kingdom
- HK Hong Kong
- IN India
- LK Sri Lanka
- RU Russia
- US United States
Examples of ISO 3166-2 region codes:
- DE-TH Thuringia, Germany
- GB-BIR Birmingham, England
- NO-03 Oslo, Norway
- US-NY New York state, US
The oceans have the following Wiki assigned code elements per de:Vorlage:Coordinate#Ozeane.
- XN Arctic Ocean
- XA Atlantic Ocean
- XI Indian Ocean
- XP Pacific Ocean
- XS Southern Ocean
In addition, two Wiki assigned code elements can be used with {{coord}}:
- XZ for objects in or above international waters (similar to UN/LOCODE).
- ZZ for use in examples.
Samples
Focus region
Region
Markup
Result
Switzerland
CH
{{coord|46.9524|N|7.4396|E|region:CH}}
46°57′09″N 7°26′23″E / 46.9524°N 7.4396°E
Berlin, Germany
DE-BE
{{coord|52.5164|N|13.3775|E|region:DE-BE}}
52°30′59″N 13°22′39″E / 52.5164°N 13.3775°E
globe:G
[golygu cod]
The globe:
parameter specifies the planet, dwarf planet, asteroid, or natural satellite upon which the coordinates reside. Apart from earth (the default), recognized values are: mercury, venus, moon, mars, phobos, deimos, ceres, vesta, ganymede, callisto, io, europa, mimas, enceladus, tethys, dione, rhea, titan, hyperion, iapetus, phoebe, miranda, ariel, umbriel, titania, oberon, triton, and pluto.
Samples
Subject
G
Markup
Result
Kittu Crater
ganymede
{{coord|0.4|N|334.6|W|globe:ganymede}}
0°24′N 334°36′W / 0.4°N 334.6°W
Viking 2 lander
mars
{{coord|48.269|N|225.990|W|globe:mars}}
48°16′08″N 225°59′24″W / 48.269°N 225.990°W
Mozart Crater
mercury
{{coord|8|N|190.5|W|globe:mercury}}
8°00′N 190°30′W / 8°N 190.5°W
Apollo 11 lander
moon
{{coord|0|40|26.69|N|23|28|22.69|E|globe:moon}}
0°40′26.69″N 23°28′22.69″E / 0.6740806°N 23.4729694°E
Ksa Crater
titan
{{coord|14.0|N|65.4|W|globe:titan}}
14°00′N 65°24′W / 14.0°N 65.4°W
Venera 13 lander
venus
{{coord|7.5|S|303|E|globe:venus}}
7°30′S 303°00′E / 7.5°S 303°E
Stickney Crater
phobos
{{coord|1|N|49|W|globe:phobos}}
1°N 49°W / 1°N 49°W
For globes other than Earth, {{coord}} does not assume a specific reference system (in contrast with Earth's WGS84). Since the template defaults to east longitude, the |W|
direction must be specified for globes that measure longitude westward. At the present time, only limited mapping is available for Mars and the Moon and none for other extraterrestrial bodies. For celestial coordinates, use {{Sky}} instead.
source:S
[golygu cod]
Specifies, where present, the data source and data source format/datum, and optionally the original data, presented in parentheses. This is initially primarily intended for use by geotagging robots, so that data is not blindly repeatedly copied from format to format and Wikipedia to Wikipedia, with progressive loss of precision and attributability.
Examples:
- A lat/long geotag derived from an Ordnance Survey National Grid Reference NM 435 355 found in the English-language Wikipedia would be tagged as "source:enwiki-osgb36(NM435355)"
- A latitude-longitude location sourced from data taken from the German-language Wikipedia would be tagged as "source:dewiki" – and so on, for other language codes;
- A location sourced from the public domain GeoNet Names Server database would be tagged as "source:GNS". No datum or format information is needed, since by default all Wikipedia coordinates are in latitude/longitude format based on the WGS84 datum. Similarly, US locations sourced from the similar public domain GNIS database would be tagged as "source:GNIS".
Per-user display customization
[golygu cod]
To always display coordinates as DMS values, add this to your common.css:
.geo-default { display: inline }
.geo-nondefault { display: inline }
.geo-dec { display: none }
.geo-dms { display: inline }
To always display coordinates as decimal values, add this to your common.css:
.geo-default { display: inline }
.geo-nondefault { display: inline }
.geo-dec { display: inline }
.geo-dms { display: none }
To display coordinates in both formats, add this to your common.css:
.geo-default { display: inline }
.geo-nondefault { display: inline }
.geo-dec { display: inline }
.geo-dms { display: inline }
.geo-multi-punct { display: inline }
If CSS is disabled, or you have an old copy of MediaWiki:Common.css cached, you will see both formats. (You can either clear your cache or manually refresh this URL: [1].)
To disable display of the blue globe adjacent to coordinates, add this to your common.js:
var wma_settings = {enabled:false}
Note that this will disable WikiMiniAtlas.
See also Wikipedia:Manual of Style (dates and numbers)#Geographical coordinates.
Incorrect uses and maintenance category
[golygu cod]
The template has some input checks built in. Most errors display a bold, red message inline and categorize the article in the hidden maintenance category Pages with malformed coordinate tags. There are currently 2 pages in that category. See the category description for further instructions.
A more thorough daily report of coordinates needing repair is at tools:~dispenser/view/File viewer#log:coord-enwiki.log.
See also: WT:GEO#To do
Internals
[golygu cod]
See Template:Coord/doc/internals and Category:Coord template.
Subtemplates
[golygu cod]
The following templates are "subroutines" of {{Coord}}. Separating them out drastically reduces the pre-expand size of {{Coord}}. They shouldn't be invoked directly.
name
function
{{Coord/display/inline}}
displays coordinates inline
{{Coord/display/inline,title}}
displays coordinates inline and above the article
{{Coord/display/title}}
displays coordinates above the article (generally to the right of the article's title)
{{Coord/link}}
generates microformats and link to GeoHack
{{Coord/input/dec}}
reads coordinates in decimal degrees {{coord|12|-12}}
{{Coord/input/d}}
reads coordinates in decimal degrees with directional letters {{coord|12|N|12|W}}
{{Coord/input/dm}}
reads coordinates in degrees/minutes format {{coord|12|12|N|12|12|W}}
{{Coord/input/dms}}
reads coordinates in degrees/minutes/seconds format {{coord|12|12|12|N|12|12|12|W}}
{{Coord/input/ERROR}}
generates error message if the inputs do not match any of the above formats
{{Coord/input/error2}}
generates error message for range checks and such
{{Coord/input/nolat}}
generates error message for missing latitude
{{Coord/negzeropad}}
pads a positive number with trailing zeroes until it matches the precision of a negative number
{{Coord/prec dec}}
selects a format for converting decimal degrees, based on the precision of the inputs
Coordinates in PDF
[golygu cod]
For generating PDF, printed books, and Open Office export format, two templates are substituted for the regular templates:
- Template:Coord/display/title/Print for {{Coord/display/title}}
- Template:Coord/link/Print for {{Coord/link}}
- Template:Coord/display/inline,title/Print for {{Coord/display/inline,title}}
Samples are available at:
Class names
[golygu cod]
The class names geo, latitude and longitude are used to generate the microformat and MUST NOT be changed.
Template Data
[golygu cod]
This template uses overloading which does not work well with the VisualEditor/TemplateData. Consider using "Edit source" instead of the visual editor until this defect is corrected. To facilitate visual editing in the mean time, consider using {{coordDec}} for signed decimal degrees, {{coordDMS}} when degrees minutes and seconds are specified, and {{coordDM}} when just degrees and minutes are given.
This is the TemplateData documentation for the template used by the new VisualEditor.
Coord
Encodes the latitude and longitude coordinates of a location, provides a link to map of the location. This template does not work well with the Visual Editor, consider using {{coordDec}} for signed decimal degrees, {{coordDMS}} when degrees minutes and seconds are specified {{coordDM}} when only degrees and minutes are specified. To use this template you will need to use positional parameter following one of these schemes: {{coord | D | M | S | NS | D | M | S | EW | geo | opts}}, {{coord | D | M | NS | D | M | EW | geo | opts}}, {{coord | D| NS | D| EW | geo | opts}} {{coord | sD | sD | geo | opts}} where D is degrees, M is minutes, S seconds, sD signed decimal degrees, NS is N or S, EW is E or W, opts are named parameter and geo are the coordinate parameters described on the main doc page.
Paramedr Disgrifiad Math Statws 1 1
Either degrees latitude or a signed decimal degrees latitude
Rhif angenrheidiol 2 2
Either: minutes latitude, signed decimal degrees longitude or 'N' or 'S'.
Llinyn angenrheidiol 3 3
Either: second latitude, degrees longitude, 'N' or 'S' or GeoHack parameters
Llinyn dewisol 4 4
Either: degrees longitude, 'N', 'S', 'E' or 'W' or GeoHack parameters
Llinyn dewisol 5 5
Either: degrees longitude, minutes longitude or GeoHack parameters
Llinyn dewisol 6 6
Either: minutes longitude, 'E' or 'W' or GeoHack parameters
Llinyn dewisol 7 7
Either second longitude, or GeoHack parameters
Llinyn dewisol 8 8
'E' or 'W'.
Llinyn dewisol 9 9
GeoHack parameters. Example: dim:30_region:US-WI_type:event
Llinyn dewisol Display display
Where it is displayed. Can be one of: 'inline' in the body of the article, 'title' at the top of the article or 'inline,title' both
- Yn ddiofyn
- inline
Llinyn dewisol Name name
a label to place on maps (default is PAGENAME)
Llinyn dewisol Notes notes
text displayed immediately following the coordinates
Llinyn dewisol Format format
How the coordinates are displayed, either 'dec' or 'dms'
Llinyn dewisol
Mae'r ddogfennaeth uchod wedi ei thrawsgynnwys o Nodyn:Coord/doc. (golygu | hanes) Gall golygyddion arbrofi yn y tudalennau pwll tywod (creu | drych) a testcases (creu). Os gwelwch yn dda, ychwanegwch gategorïau a rhyngwicis at yr is-dudalen /doc. Is-dudalennau'r nodyn hwn. |