This module is intended to replace the functionality of {{Coord}} and related

templates. It provides several methods, including

coordinate values.

degree values to DMS format.

to decimal degree format.

]]

require('Module:No globals')

local math_mod = require("Module:Math")

local coordinates = {};

local current_page = mw.title.getCurrentTitle()

local page_name = mw.uri.encode( current_page.prefixedText, 'WIKI' );

local coord_link = '//tools.wmflabs.org/geohack/geohack.php?pagename=' .. page_name .. '¶ms='

local function displaytitle(s, notes)

local l = "Coordinates: " .. s

local co = '' .. l .. notes .. '';

return '' .. co .. '';

end

local function displayinline(s, notes)

return s .. notes

end

local function dmsTest(first, second)

if type(first) ~= 'string' or type(second) ~= 'string' then

return nil

end

local s = (first .. second):upper()

return s:find('^[NS][EW]$') or s:find('^[EW][NS]$')

end

local function makeInvokeFunc(funcName)

return function (frame)

local args = require('Module:Arguments').getArgs(frame, {

wrappers = 'Template:Coord'

})

return coordinates[funcName](args, frame)

end

end

local function optionalArg(arg, supplement)

return arg and arg .. supplement or

end

Formats any error messages generated for display

]]

local function errorPrinter(errors)

local result = ""

for i,v in ipairs(errors) do

local errorHTML = 'Coordinates: ' .. v[2] .. ''

result = result .. errorHTML .. "
"

end

return result

end

Determine the required CSS class to display coordinates

Usually geo-nondefault is hidden by CSS, unless a user has overridden this for himself

default is the mode as specificied by the user when calling the {{coord}} template

mode is the display mode (dec or dms) that we will need to determine the css class for

]]

local function displayDefault(default, mode)

if default == "" then

default = "dec"

end

if default == mode then

return "geo-default"

else

return "geo-nondefault"

end

end

specPrinter

Output formatter. Takes the structure generated by either parseDec

or parseDMS and formats it for inclusion on Wikipedia.

]]

local function specPrinter(args, coordinateSpec)

local uriComponents = coordinateSpec["param"]

if uriComponents == "" then

-- RETURN error, should never be empty or nil

return "ERROR param was empty"

end

if args["name"] then

uriComponents = uriComponents .. "&title=" .. mw.uri.encode(coordinateSpec["name"])

end

local geodmshtml = ''

.. '' .. coordinateSpec["dms-lat"] .. ' '

.. '' ..coordinateSpec["dms-long"] .. ''

.. ''

local lat = tonumber( coordinateSpec["dec-lat"] ) or 0

local geodeclat

if lat < 0 then

-- FIXME this breaks the pre-existing precision

geodeclat = tostring(coordinateSpec["dec-lat"]):sub(2) .. "°S"

else

geodeclat = (coordinateSpec["dec-lat"] or 0) .. "°N"

end

local long = tonumber( coordinateSpec["dec-long"] ) or 0

local geodeclong

if long < 0 then

-- FIXME does not handle unicode minus

geodeclong = tostring(coordinateSpec["dec-long"]):sub(2) .. "°W"

else

geodeclong = (coordinateSpec["dec-long"] or 0) .. "°E"

end

local geodechtml = ''

.. geodeclat .. ' '

.. geodeclong

.. ''

local geonumhtml = ''

.. coordinateSpec["dec-lat"] .. '; '

.. coordinateSpec["dec-long"]

.. ''

local inner = '' .. geodmshtml .. ''

.. ' / '

.. '';

if not args["name"] then

inner = inner .. geodechtml

.. ' / ' .. geonumhtml .. ''

else

inner = inner .. '' .. geodechtml

.. ' / ' .. geonumhtml .. ''

.. ' ('

.. args["name"] .. ')'

end

return '' ..

'[' .. coord_link .. uriComponents .. ' ' .. inner .. ']' .. ''

end

local function convert_dec2dms_d(coordinate)

local d = math_mod._round( coordinate, 0 ) .. "°"

return d .. ""

end

local function convert_dec2dms_dm(coordinate)

coordinate = math_mod._round( coordinate * 60, 0 );

local m = coordinate % 60;

coordinate = math.floor( (coordinate - m) / 60 );

local d = coordinate % 360 .."°"

return d .. string.format( "%02d′", m )

end

local function convert_dec2dms_dms(coordinate)

coordinate = math_mod._round( coordinate * 60 * 60, 0 );

local s = coordinate % 60

coordinate = math.floor( (coordinate - s) / 60 );

local m = coordinate % 60

coordinate = math.floor( (coordinate - m) / 60 );

local d = coordinate % 360 .."°"

return d .. string.format( "%02d′", m ) .. string.format( "%02d″", s )

end

Helper function, convert decimal latitude or longitude to

degrees, minutes, and seconds format based on the specified precision.

]]

local function convert_dec2dms(coordinate, firstPostfix, secondPostfix, precision)

local coord = tonumber(coordinate)

local postfix

if coord >= 0 then

postfix = firstPostfix

else

postfix = secondPostfix

end

precision = precision:lower();

if precision == "dms" then

return convert_dec2dms_dms( math.abs( coord ) ) .. postfix;

elseif precision == "dm" then

return convert_dec2dms_dm( math.abs( coord ) ) .. postfix;

elseif precision == "d" then

return convert_dec2dms_d( math.abs( coord ) ) .. postfix;

end

end

Convert DMS format into a N or E decimal coordinate

]]

local function convert_dms2dec(direction, degrees_str, minutes_str, seconds_str)

local degrees = tonumber(degrees_str)

local minutes = tonumber(minutes_str) or 0

local seconds = tonumber(seconds_str) or 0

local factor = 1

if direction == "S" or direction == "W" then

factor = -1

end

local precision = 0

if seconds_str then

precision = 5 + math.max( math_mod._precision(seconds_str), 0 );

elseif minutes_str and minutes_str ~= then

precision = 3 + math.max( math_mod._precision(minutes_str), 0 );

else

precision = math.max( math_mod._precision(degrees_str), 0 );

end

local decimal = factor * (degrees+(minutes+seconds/60)/60)

return string.format( "%." .. precision .. "f", decimal ) -- not tonumber since this whole thing is string based.

end

Checks input values to for out of range errors.

]]

local function validate( lat_d, lat_m, lat_s, long_d, long_m, long_s, source, strong )

local errors = {};

lat_d = tonumber( lat_d ) or 0;

lat_m = tonumber( lat_m ) or 0;

lat_s = tonumber( lat_s ) or 0;

long_d = tonumber( long_d ) or 0;

long_m = tonumber( long_m ) or 0;

long_s = tonumber( long_s ) or 0;

if strong then

if lat_d < 0 then

table.insert(errors, {source, "latitude degrees < 0 with hemisphere flag"})

end

if long_d < 0 then

table.insert(errors, {source, "longitude degrees < 0 with hemisphere flag"})

end

--[[

#coordinates is inconsistent about whether this is an error. If globe: is

specified, it won't error on this condition, but otherwise it will.

For not simply disable this check.

if long_d > 180 then

table.insert(errors, {source, "longitude degrees > 180 with hemisphere flag"})

end

]]

end

if lat_d > 90 then

table.insert(errors, {source, "latitude degrees > 90"})

end

if lat_d < -90 then

table.insert(errors, {source, "latitude degrees < -90"})

end

if lat_m >= 60 then

table.insert(errors, {source, "latitude minutes >= 60"})

end

if lat_m < 0 then

table.insert(errors, {source, "latitude minutes < 0"})

end

if lat_s >= 60 then

table.insert(errors, {source, "latitude seconds >= 60"})

end

if lat_s < 0 then

table.insert(errors, {source, "latitude seconds < 0"})

end

if long_d >= 360 then

table.insert(errors, {source, "longitude degrees >= 360"})

end

if long_d <= -360 then

table.insert(errors, {source, "longitude degrees <= -360"})

end

if long_m >= 60 then

table.insert(errors, {source, "longitude minutes >= 60"})

end

if long_m < 0 then

table.insert(errors, {source, "longitude minutes < 0"})

end

if long_s >= 60 then

table.insert(errors, {source, "longitude seconds >= 60"})

end

if long_s < 0 then

table.insert(errors, {source, "longitude seconds < 0"})

end

return errors;

end

parseDec

Transforms decimal format latitude and longitude into the

structure to be used in displaying coordinates

]]

local function parseDec( lat, long, format )

local coordinateSpec = {}

local errors = {}

if not long then

return nil, {{"parseDec", "Missing longitude"}}

elseif not tonumber(long) then

return nil, {{"parseDec", "Longitude could not be parsed as a number: " .. long}}

end

errors = validate( lat, nil, nil, long, nil, nil, 'parseDec', false );

coordinateSpec["dec-lat"] = lat;

coordinateSpec["dec-long"] = long;

local mode = coordinates.determineMode( lat, long );

coordinateSpec["dms-lat"] = convert_dec2dms( lat, "N", "S", mode) -- {{coord/dec2dms|{{{1}}}|N|S|{{coord/prec dec|{{{1}}}|{{{2}}}}}}}

coordinateSpec["dms-long"] = convert_dec2dms( long, "E", "W", mode) -- {{coord/dec2dms|{{{2}}}|E|W|{{coord/prec dec|{{{1}}}|{{{2}}}}}}}

if format then

coordinateSpec.default = format

else

coordinateSpec.default = "dec"

end

return coordinateSpec, errors

end

parseDMS

Transforms degrees, minutes, seconds format latitude and longitude

into the a structure to be used in displaying coordinates

]]

local function parseDMS( lat_d, lat_m, lat_s, lat_f, long_d, long_m, long_s, long_f, format )

local coordinateSpec, errors, backward = {}, {}

lat_f = lat_f:upper();

long_f = long_f:upper();

-- Check if specified backward

if lat_f == 'E' or lat_f == 'W' then

lat_d, long_d, lat_m, long_m, lat_s, long_s, lat_f, long_f, backward = long_d, lat_d, long_m, lat_m, long_s, lat_s, long_f, lat_f, true;

end

errors = validate( lat_d, lat_m, lat_s, long_d, long_m, long_s, 'parseDMS', true );

if not long_d then

return nil, {{"parseDMS", "Missing longitude" }}

elseif not tonumber(long_d) then

return nil, {{"parseDMS", "Longitude could not be parsed as a number:" .. long_d }}

end

if not lat_m and not lat_s and not long_m and not long_s and #errors == 0 then

if math_mod._precision( lat_d ) > 0 or math_mod._precision( long_d ) > 0 then

if lat_f:upper() == 'S' then

lat_d = '-' .. lat_d;

end

if long_f:upper() == 'W' then

long_d = '-' .. long_d;

end

return parseDec( lat_d, long_d, format );

end

end

coordinateSpec["dms-lat"] = lat_d.."°"..optionalArg(lat_m,"′") .. optionalArg(lat_s,"″") .. lat_f

coordinateSpec["dms-long"] = long_d.."°"..optionalArg(long_m,"′") .. optionalArg(long_s,"″") .. long_f

coordinateSpec["dec-lat"] = convert_dms2dec(lat_f, lat_d, lat_m, lat_s) -- {{coord/dms2dec|{{{4}}}|{{{1}}}|0{{{2}}}|0{{{3}}}}}

coordinateSpec["dec-long"] = convert_dms2dec(long_f, long_d, long_m, long_s) -- {{coord/dms2dec|{{{8}}}|{{{5}}}|0{{{6}}}|0{{{7}}}}}

if format then

coordinateSpec.default = format

else

coordinateSpec.default = "dms"

end

return coordinateSpec, errors, backward

end

Check the input arguments for coord to determine the kind of data being provided

and then make the necessary processing.

]]

local function formatTest(args)

local result, errors

local backward, primary = false, false

local function getParam(args, lim)

local ret = {}

for i = 1, lim do

ret[i] = args[i] or

end

return table.concat(ret, '_')

end

if not args[1] then

-- no lat logic

return errorPrinter( {{"formatTest", "Missing latitude"}} )

elseif not tonumber(args[1]) then

-- bad lat logic

return errorPrinter( {{"formatTest", "Unable to parse latitude as a number:" .. args[1]}} )

elseif not args[4] and not args[5] and not args[6] then

-- dec logic

result, errors = parseDec(args[1], args[2], args.format)

if not result then

return errorPrinter(errors);

end

-- formatting for geohack: geohack expects D_N_D_E notation or D;D notation

-- wikiminiatlas doesn't support D;D notation

-- #coordinates parserfunction doesn't support negative decimals with NSWE

result.param = table.concat({

math.abs(tonumber(args[1])),

((tonumber(args[1]) or 0) < 0) and 'S' or 'N',

math.abs(tonumber(args[2])),

((tonumber(args[2]) or 0) < 0) and 'W' or 'E',

args[3] or }, '_')

elseif dmsTest(args[4], args[8]) then

-- dms logic

result, errors, backward = parseDMS(args[1], args[2], args[3], args[4],

args[5], args[6], args[7], args[8], args.format)

if args[10] then

table.insert(errors, {'formatTest', 'Extra unexpected parameters'})

end

if not result then

return errorPrinter(errors)

end

result.param = getParam(args, 9)

elseif dmsTest(args[3], args[6]) then

-- dm logic

result, errors, backward = parseDMS(args[1], args[2], nil, args[3],

args[4], args[5], nil, args[6], args['format'])

if args[8] then

table.insert(errors, {'formatTest', 'Extra unexpected parameters'})

end

if not result then

return errorPrinter(errors)

end

result.param = getParam(args, 7)

elseif dmsTest(args[2], args[4]) then

-- d logic

result, errors, backward = parseDMS(args[1], nil, nil, args[2],

args[3], nil, nil, args[4], args.format)

if args[6] then

table.insert(errors, {'formatTest', 'Extra unexpected parameters'})

end

if not result then

return errorPrinter(errors)

end

result.param = getParam(args, 5)

else

-- Error

return errorPrinter({{"formatTest", "Unknown argument format"}})

end

result.name = args.name

local extra_param = {'dim', 'globe', 'scale', 'region', 'source', 'type'}

for _, v in ipairs(extra_param) do

if args[v] then

table.insert(errors, {'formatTest', 'Parameter: "' .. v .. '=" should be "' .. v .. ':"' })

end

end

local ret = specPrinter(args, result)

if #errors > 0 then

ret = ret .. ' ' .. errorPrinter(errors) ..

end

return ret, backward

end

Generate Wikidata tracking categories.

]]

local function makeWikidataCategories(qid)

local ret

if mw.wikibase and current_page.namespace == 0 then

local entity = qid and mw.wikibase.getEntityObject(qid) or mw.wikibase.getEntityObject()

if entity and entity.claims and entity.claims.P625 and entity.claims.P625[1] then

local snaktype = entity.claims.P625[1].mainsnak.snaktype

if snaktype == 'value' then

-- coordinates exist both here and on Wikidata, and can be compared.

ret = 'Coordinates on Wikidata'

elseif snaktype == 'somevalue' then

ret = 'Coordinates on Wikidata set to unknown value'

elseif snaktype == 'novalue' then

ret = 'Coordinates on Wikidata set to no value'

end

else

-- We have to either import the coordinates to Wikidata or remove them here.

ret = 'Coordinates not on Wikidata'

end

end

if ret then

return string.format(, ret)

else

return

end

end

link

Simple function to export the coordinates link for other uses.

Usage:

{{#invoke:Coordinates | link }}

]]

function coordinates.link(frame)

return coord_link;

end

dec2dms

Wrapper to allow templates to call dec2dms directly.

Usage:

{{#invoke:Coordinates | dec2dms | decimal_coordinate | positive_suffix |

negative_suffix | precision }}

decimal_coordinate is converted to DMS format. If positive, the positive_suffix

is appended (typical N or E), if negative, the negative suffix is appended. The

specified precision is one of 'D', 'DM', or 'DMS' to specify the level of detail

to use.

]]

coordinates.dec2dms = makeInvokeFunc('_dec2dms')

function coordinates._dec2dms(args)

local coordinate = args[1]

local firstPostfix = args[2] or

local secondPostfix = args[3] or

local precision = args[4] or

return convert_dec2dms(coordinate, firstPostfix, secondPostfix, precision)

end

Helper function to determine whether to use D, DM, or DMS

format depending on the precision of the decimal input.

]]

function coordinates.determineMode( value1, value2 )

local precision = math.max( math_mod._precision( value1 ), math_mod._precision( value2 ) );

if precision <= 0 then

return 'd'

elseif precision <= 2 then

return 'dm';

else

return 'dms';

end

end

dms2dec

Wrapper to allow templates to call dms2dec directly.

Usage:

{{#invoke:Coordinates | dms2dec | direction_flag | degrees |

minutes | seconds }}

Converts DMS values specified as degrees, minutes, seconds too decimal format.

direction_flag is one of N, S, E, W, and determines whether the output is

positive (i.e. N and E) or negative (i.e. S and W).

]]

coordinates.dms2dec = makeInvokeFunc('_dms2dec')

function coordinates._dms2dec(args)

local direction = args[1]

local degrees = args[2]

local minutes = args[3]

local seconds = args[4]

return convert_dms2dec(direction, degrees, minutes, seconds)

end

coord

Main entry point for Lua function to replace {{coord}}

Usage:

{{#invoke:Coordinates | coord }}

{{#invoke:Coordinates | coord | lat | long }}

{{#invoke:Coordinates | coord | lat | lat_flag | long | long_flag }}

...

Refer to {{coord}} documentation page for many additional parameters and

configuration options.

Note: This function provides the visual display elements of {{coord}}. In

order to load coordinates into the database, the {{#coordinates:}} parser

function must also be called, this is done automatically in the Lua

version of {{coord}}.

]]

coordinates.coord = makeInvokeFunc('_coord')

function coordinates._coord(args)

if (not args[1] or not tonumber(args[1])) and not args[2] and mw.wikibase.getEntityObject() then

args[3] = args[1]; args[1] = nil

local entity = args.qid and mw.wikibase.getEntityObject(args.qid) or mw.wikibase.getEntityObject()

if entity

and entity.claims

and entity.claims.P625

and entity.claims.P625[1].mainsnak.snaktype == 'value'

then

local precision = entity.claims.P625[1].mainsnak.datavalue.value.precision

args[1]=entity.claims.P625[1].mainsnak.datavalue.value.latitude

args[2]=entity.claims.P625[1].mainsnak.datavalue.value.longitude

if precision then

precision=-math_mod._round(math.log(precision)/math.log(10),0)

args[1]=math_mod._round(args[1],precision)

args[2]=math_mod._round(args[2],precision)

end

end

end

local contents, backward = formatTest(args)

local Notes = args.notes or

local Display = args.display and args.display:lower() or 'inline'

local function isInline(s)

-- Finds whether coordinates are displayed inline.

return s:find('inline') ~= nil or s == 'i' or s == 'it' or s == 'ti'

end

local function isInTitle(s)

-- Finds whether coordinates are displayed in the title.

return s:find('title') ~= nil or s == 't' or s == 'it' or s == 'ti'

end

local function coord_wrapper(in_args)

-- Calls the parser function {{#coordinates:}}.

return mw.getCurrentFrame():callParserFunction('#coordinates', in_args) or

end

local text =

if isInline(Display) then

text = text .. displayinline(contents, Notes)

end

if isInTitle(Display) then

text = text

.. displaytitle(contents, Notes)

.. makeWikidataCategories(args.qid)

end

if not args.nosave then

local page_title, count = mw.title.getCurrentTitle(), 1

if backward then

local tmp = {}

while not string.find((args[count-1] or ), '[EW]') do tmp[count] = (args[count] or ); count = count+1 end

tmp.count = count; count = 2*(count-1)

while count >= tmp.count do table.insert(tmp, 1, (args[count] or )); count = count-1 end

for i, v in ipairs(tmp) do args[i] = v end

else

while count <= 9 do args[count] = (args[count] or ); count = count+1 end

end

if isInTitle(Display) and not page_title.isTalkPage and page_title.subpageText ~= 'doc' and page_title.subpageText ~= 'testcases' then args[10] = 'primary' end

args.notes, args.format, args.display = nil

text = text .. coord_wrapper(args)

end

return text

end

coord2text

Extracts a single value from a transclusion of {{Coord}}.

IF THE GEOHACK LINK SYNTAX CHANGES THIS FUNCTION MUST BE MODIFIED.

Usage:

Valid values for the second parameter are: lat (signed integer), long (signed integer), type, scale, dim, region, globe, source

]]

function coordinates.coord2text(frame)

if frame.args[1] == or frame.args[2] == or not frame.args[2] then return nil end

frame.args[2] = mw.text.trim(frame.args[2])

if frame.args[2] == 'lat' or frame.args[2] == 'long' then

local result, negative = mw.text.split((mw.ustring.match(frame.args[1],'[%.%d]+°[NS] [%.%d]+°[EW]') or ), ' ')

if frame.args[2] == 'lat' then

result, negative = result[1], 'S'

else

result, negative = result[2], 'W'

end

result = mw.text.split(result, '°')

if result[2] == negative then result[1] = '-'..result[1] end

return result[1]

else

return mw.ustring.match(frame.args[1], 'params=.-_'..frame.args[2]..':(.-)[ _]')

end

end

coordinsert

Injects some text into the Geohack link of a transclusion of {{Coord}} (if that text isn't already in the transclusion). Outputs the modified transclusion of {{Coord}}.

IF THE GEOHACK LINK SYNTAX CHANGES THIS FUNCTION MUST BE MODIFIED.

Usage:

Do not make Geohack unhappy by inserting something which isn't mentioned in the {{Coord}} documentation.

]]

function coordinates.coordinsert(frame)

for i, v in ipairs(frame.args) do

if i ~= 1 then

if not mw.ustring.find(frame.args[1], (mw.ustring.match(frame.args[i], '^(.-:)') or )) then

frame.args[1] = mw.ustring.gsub(frame.args[1], '(params=.-)_? ', '%1_'..frame.args[i]..' ')

end

end

end

if frame.args.name then

if not mw.ustring.find(frame.args[1], '') then

local namestr = frame.args.name

frame.args[1] = mw.ustring.gsub(frame.args[1],

'()(]*>[^<>]*]*>[^<>]*]*>[^<>]*)()',

'%1%2 (' .. namestr .. ')%3')

frame.args[1] = mw.ustring.gsub(frame.args[1], '(¶ms=[^&"<>%[%] ]*) ', '%1&title=' .. mw.uri.encode(namestr) .. ' ')

end

end

return frame.args[1]

end

return coordinates

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