Modul:Coordonate

Documentația acestui modul poate fi creată la Modul:Coordonate/doc

--[[
This module is intended to replace the functionality of {{Coord}} and related
templates.  It provides several methods, including
 
{{#Invoke:Coordinates | coord }} : General function formatting and displaying
coordinate values.
 
{{#Invoke:Coordinates | dec2dms }} : Simple function for converting decimal
degree values to DMS format.
 
{{#Invoke:Coordinates | dms2dec }} : Simple function for converting DMS format
to decimal degree format.
 
{{#Invoke:Coordinates | link }} : Export the link used to reach the tools
 
]]
 
math_mod = require( "Module:Matematică" );
globalFrame = nil
primary = nil
coordinates = {};
 
page_name = mw.uri.encode( mw.title.getCurrentTitle().prefixedText, 'WIKI' );
coord_link = '<maplink zoom="%d" latitude="%f" longitude="%f" text="%s">{"type":"Feature","geometry":{"type":"Point","coordinates":[%f,%f]},"properties":{"marker-size":"medium","title":"%s","marker-color":"#228b22"}}</maplink>'
 
--[[ Helper function, replacement for {{coord/display/title}} ]]
function displaytitle (s, notes)
	local htmlTitle = mw.html.create('span')
			:attr{ id = 'coordinates' }
			:addClass( 'noprint')
			:node( s )
    local frame = mw.getCurrentFrame()

	return frame:extensionTag( 'indicator', tostring(htmlTitle), { name = 'coordinates' }	)
end
 
--[[ Helper function, Replacement for {{coord/display/inline}} ]]
function displayinline (s, notes)
    return s
end
 
--[[ Helper function, used in detecting DMS formatting ]]
local dmsTest = function(first, second)
    local concatenated = tostring(first):upper() .. tostring(second):upper();
 
    if concatenated == "NE" or concatenated == "NW" or concatenated == "SE" or concatenated == "SW" or concatenated == "NV" or concatenated == "SV" or
        concatenated == "EN" or concatenated == "WN" or concatenated == "ES" or concatenated == "WS" or concatenated == "VN" or concatenated == "VS" then
        return true;
    end
    return false;
end

--[[ Helper function, used to convert localized data to format accepted by {{#coordinates}} and geohack ]]
local convertToEnglish = function(localized)
    if localized:upper() == "V" or localized:upper() == "O" then
    	return "W";
    end
    return localized;
end

--[[ Helper function, used to convert English worlds to localized equivalent ]]
local convertToLocal = function(localized)
    if localized:upper() == "W" then --TODO: should handle °W as well
    	return "V";
    end
    return localized;
end
 
--[[
parseDec
 
Transforms decimal format latitude and longitude into the a
structure to be used in displaying coordinates
]]
function parseDec( lat, long, format )
    local coordinateSpec = {}
    local errors = {}
 
    if long == "" or long == nil then
        return nil, {{"parseDec", "Lipsește longitudinea"}}
    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
 
--[[ Helper function, handle optional args. ]]
function optionalArg(arg, suplement)
    if arg ~= nil and arg ~= "" then
        return arg .. suplement
    end
    return ""
end
 
--[[
parseDMS
 
Transforms degrees, minutes, seconds format latitude and longitude 
into the a structure to be used in displaying coordinates
]]
function parseDMS( lat_d, lat_m, lat_s, lat_f, long_d, long_m, long_s, long_f, format )
    local coordinateSpec = {}
    local errors = {}
 
    lat_f = lat_f:upper();
    long_f = long_f:upper();
 
    -- Check if specified backward
    if lat_f == 'E' or lat_f == 'W' or lat_f == 'V' then
        local t_d, t_m, t_s, t_f;
        t_d = lat_d;
        t_m = lat_m;
        t_s = lat_s;
        t_f = lat_f;
        lat_d = long_d;
        lat_m = long_m;
        lat_s = long_s;
        lat_f = long_f;
        long_d = t_d;
        long_m = t_m;
        long_s = t_s;
        long_f = t_f;
    end    
 
    errors = validate( lat_d, lat_m, lat_s, long_d, long_m, long_s, 'parseDMS', true );
    if long_d == nil or long_d == "" then
        table.insert(errors, {"parseDMS", "Missing longitude" })
    end
 
    if lat_m == nil and lat_s == nil and long_m == nil and long_s == nil 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,"″") .. convertToLocal(lat_f)
    coordinateSpec["dms-long"] = long_d.."°"..optionalArg(long_m,"′") .. optionalArg(long_s,"″") .. convertToLocal(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
end

local function coord_wrapper(coordinateSpec)
    local geodata = ''
	geodata = '{{#coordinates:' .. coordinateSpec["dec-lat"] .. '|' .. coordinateSpec["dec-long"]
	if primary == true then
		geodata = geodata .. '|primary'
	end
	geodata = geodata .. '}}'
	globalFrame:preprocess(geodata)
end
 
--[[
specPrinter
 
Output formatter.  Takes the structure generated by either parseDec
or parseDMS and formats it for inclusion on Wikipedia.
]]
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
    uriComponents = uriComponents .. "&language=ro"	
    if args["name"] ~= "" and args["name"] ~= nil then
        uriComponents = uriComponents .. "&title=" .. mw.uri.encode(coordinateSpec["name"])
    end
 
    local lat = tonumber( coordinateSpec["dec-lat"] ) or 0
    if lat < 0 then
        -- FIXME this breaks the pre-existing precision
        if type(coordinateSpec["dec-lat"]) == 'string' then
        	geodeclat = coordinateSpec["dec-lat"]:sub(2) .. "°S"
        elseif type(coordinateSpec["dec-lat"]) == 'number' then
        	geodeclat = tonumber(-coordinateSpec["dec-lat"]) .. "°S"
        end
    else
        geodeclat = (coordinateSpec["dec-lat"] or 0) .. "°N"
    end
 
    local long = tonumber( coordinateSpec["dec-long"] ) or 0
    if long < 0 then
        -- FIXME does not handle unicode minus
        if type(coordinateSpec["dec-long"]) == 'string' then
        	geodeclong = coordinateSpec["dec-long"]:sub(2) .. "°V"
        elseif type(coordinateSpec["dec-long"]) == 'number' then
        	geodeclong = tostring(-coordinateSpec["dec-long"]) .. "°V"
        end
    else
        geodeclong = (coordinateSpec["dec-long"] or 0) .. "°E"
    end
    
    local text = coordinateSpec["name"] or args["name"] or "{{PAGENAME}}"
    local geodmshtml = ""
    local geodechtml = ""

	if args["full"] == true or coordinateSpec["default"] == "dms" then
    	geodmshtml = globalFrame:callParserFunction{ name = '#tag:maplink', args = {
    	'{"type":"Feature",'
    	.. '"geometry":{"type":"Point","coordinates":[' .. long .. ',' .. lat ..']},'
    	.. '"properties":{"marker-size":"medium","title":"' .. text .. '",'
    	.. '"marker-color":"#228b22"}}', 
    	zoom = 16, latitude=lat, longitude=long, text=coordinateSpec["dms-lat"] .. ' ' .. coordinateSpec["dms-long"] }}
    	if coordinateSpec["default"] == "dms" then
    		geodmshtml = '<span class="vcard">' .. geodmshtml
			geodmshtml = geodmshtml .. '<span style="display:none">&#xfeff; (<span class="fn org">' .. text .. '</span>)</span>'
    		geodmshtml = geodmshtml .. '</span>'
    	end
    end
 
	if args["full"] == true or coordinateSpec["default"] ~= "dms" then
    	geodechtml = globalFrame:callParserFunction{ name = '#tag:maplink', args = {
    	'{"type":"Feature",'
    	.. '"geometry":{"type":"Point","coordinates":[' .. long .. ',' .. lat ..']},"properties":{"marker-size":"medium","title":"' .. text .. '","marker-color":"#228b22"}}', 
    	zoom = 16, latitude=lat, longitude=long, text=geodeclat .. ' ' .. geodeclong }}
    	if coordinateSpec["default"] ~= "dms" then
    		geodechtml = '<span class="vcard">' .. geodechtml
    		geodechtml = geodechtml .. '<span style="display:none">&#xfeff; (<span class="fn org">' .. text .. '</span>)</span>'
    		geodechtml = geodechtml .. '</span>'
    	end
    end

    local geonumhtml = '<span class="geo">'
             .. coordinateSpec["dec-lat"] .. '; '
             .. coordinateSpec["dec-long"]
             .. '</span>'
    local inner;
    inner = '';
    
    if args["full"] == true then
    	inner = "<span class=\"" .. displayDefault(coordinateSpec["default"], "dms")
    			.. "\">" .. geodmshtml .. "</span>"
    	inner = inner.. '<span class="geo-multi-punct">&#xfeff; / &#xfeff;</span>';
    	inner = inner.. "<span class=\"" 
    			.. displayDefault(coordinateSpec["default"], "dec")
    			.. "\">" .. geodechtml .. "</span>";
    	return inner
    else
    	if coordinateSpec["default"] == "dms" then
    		return geodmshtml
    	else
    		return geodechtml
    	end
    end
end
 
--[[
Formats any error messages generated for display
]]
function errorPrinter(errors)
    local result = ""
    for i,v in ipairs(errors) do
        local errorHTML = '<strong class="error">Coordonate: ' .. v[2] .. '</strong>'
        result = result .. errorHTML .. "<br />"
    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 
]]
function displayDefault(default, mode)
    if default == "" then
        default = "dec"
    end
 
    if default == mode then
        return "geo-default"
    else
        return "geo-nondefault"
    end
end
 
--[[ 
Check the input arguments for coord to determine the kind of data being provided
and then make the necessary processing.
]]
function formatTest(args)
    local result, errors;
 
    if args[1] == "" then
        -- no lat logic
        return errorPrinter( {{"formatTest", "Lipsește latitudinea"}} )
    elseif args[4] == "" and args[5] == "" and args[6] == "" then
        -- dec logic
        result, errors = parseDec( args[1], args[2], args['format'] )
        if result == nil then
            return errorPrinter( errors );
        end              
        result.param    = table.concat( {args[1], "_N_", args[2], "_E_", args[3] } );
    elseif dmsTest(args[4], args[8]) then
        -- dms logic
        result, errors = parseDMS( args[1], args[2], args[3], convertToEnglish(args[4]), 
            args[5], args[6], args[7], convertToEnglish(args[8]), args['format'] )
        result.param = table.concat( { args[1], args[2], args[3], convertToEnglish(args[4]), args[5],
            args[6], args[7], convertToEnglish(args[8]), args[9] } , '_' );
        if args[10] ~= '' then
            table.insert( errors, { 'formatTest', 'Parametri adiționali pe care nu îi așteptam' } );
        end        
    elseif dmsTest(args[3], args[6]) then
        -- dm logic
        result, errors = parseDMS( args[1], args[2], nil, convertToEnglish(args[3]), 
            args[4], args[5], nil, convertToEnglish(args[6]), args['format'] )
        result.param = table.concat( { args[1], args[2], convertToEnglish(args[3]), args[4], args[5],
            convertToEnglish(args[6]), args[7] } , '_' );
        if args[8] ~= '' then
            table.insert( errors, { 'formatTest', 'Parametri adiționali pe care nu îi așteptam' } );
        end        
    elseif dmsTest(args[2], args[4]) then
        -- d logic
        result, errors = parseDMS( args[1], nil, nil, convertToEnglish(args[2]), 
            args[3], nil, nil, convertToEnglish(args[4]), args['format'] )
        result.param = table.concat( { args[1], convertToEnglish(args[2]), args[3], convertToEnglish(args[4]), args[5] } , '_' );
        if args[6] ~= '' then
            table.insert( errors, { 'formatTest', 'Parametri adiționali pe care nu îi așteptam' } );
        end        
    else
        -- Error
        return errorPrinter( {{"formatTest", "Format necunoscut al argumentelor"}} )
    end
    result.name     = args["name"]
 
    local extra_param = {'dim', 'globe', 'scale', 'region', 'source', 'type'}
    for _, v in ipairs( extra_param ) do
        if (args[v] or '') ~= '' then 
            table.insert( errors, {'formatTest', 'Parametrul: "' .. v .. '=" ar trebui să fie "' .. v .. ':"' } );
        end
    end
 
    if #errors == 0 then
        txt = specPrinter( args, result )   
    else
        txt = specPrinter( args, result ) 
        txt = txt .. " " .. errorPrinter(errors) .. '[[Category:Pages with malformed coordinate tags]]'; 
    end 
    coord_wrapper(result)
    return txt
end
 
--[[ 
Helper function, convert decimal latitude or longitude to 
degrees, minutes, and seconds format based on the specified precision.  
]]
function convert_dec2dms(coordinate, firstPostfix, secondPostfix, precision)
    local coord = tonumber(coordinate) or 0
    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
 
--[[ Helper function, convert decimal to degrees ]]
function convert_dec2dms_d(coordinate)
    local d = math_mod._round( coordinate, 0 ) .. "°"
    return d .. ""
end
 
--[[ Helper function, convert decimal to degrees and minutes ]]
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
 
--[[ Helper function, convert decimal to degrees, minutes, and seconds ]]
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
 
--[[
Convert DMS format into a N or E decimal coordinate
]]
function convert_dms2dec(direction, degrees_str, minutes_str, seconds_str)
    local degrees = tonumber(degrees_str) or 0
    local minutes = tonumber(minutes_str) or 0
    local seconds = tonumber(seconds_str) or 0
 
    local factor
    direction = mw.ustring.gsub(direction, '^[ ]*(.-)[ ]*$', '%1');
    if direction == "N" or direction == "E" then
        factor = 1
    else
        factor = -1
    end
 
    local precision = 0
    if seconds_str ~= nil and seconds_str ~= '' then
        precision = 5 + math.max( math_mod._precision(seconds_str), 0 );
    elseif minutes_str ~= nil 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.
]]
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
 
--[[
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.
]]
function coordinates.dec2dms(frame)
    globalFrame = frame
    local coordinate = frame.args[1]
    local firstPostfix = frame.args[2]
    local secondPostfix = frame.args[3]
    local precision = frame.args[4]
 
    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).
]]
function coordinates.dms2dec(frame)
    globalFrame = frame
    local direction = frame.args[1]
    local degrees = frame.args[2]
    local minutes = frame.args[3]
    local seconds = frame.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}}.
]]
function coordinates.coordImplFrame(frame, full)
    globalFrame = frame
    local args = frame.args
    if args[1] == nil then
        local pFrame = frame:getParent();
        args = pFrame.args;
        for k,v in pairs( frame.args ) do
            args[k] = v;
        end
    end
    args['format'] = args['format'] or '';
    args['full'] = full;
    mw.logObject(args);
    return coordinates.coordImpl(args)
end

--[[
Function that formats the coordinates. Can be called from other modules.
]]
function coordinates.coordImpl(args)
	-- Functions downstream require args[1..10] to be set.    
    for i=1,10 do 
        if args[i] == nil then 
            args[i] = ""
        else
        	if type(args[i]) == 'string' then
            	args[i] = args[i]:match( '^%s*(.-)%s*$' );  --remove whitespace
            end
        end     
    end 
    local Notes = args.notes or ""
    local Display = string.lower(args.display or "inline")
    if Display == '' then
        Display = 'inline';
    end
    if string.find( Display, 'title' ) ~= nil or Display == 't' or 
            Display == 'it' or Display == 'ti' then
    	primary = true
    else
    	primary = false
    end
	local contents = formatTest(args)
 
    local text = ''
    if string.find( Display, 'title' ) ~= nil or Display == 't' or 
            Display == 'it' or Display == 'ti' then
        text = text .. displaytitle(contents, Notes)
    end
    if string.find( Display, 'inline' ) ~= nil or Display == 'i' or 
            Display == 'it' or Display == 'ti' then
        text = text .. displayinline(contents, Notes)
    end
	return text
end

function coordinates.coord(frame)
	return coordinates.coordImplFrame(frame, true) 
end

function coordinates.simpleCoord(frame)
	return coordinates.coordImplFrame(frame, false) 
end

function coordinates.testMaplink(frame)
	mw.logObject(frame)
	lat = frame.args[1]
	latH = frame.args[2]
	long = frame.args[3]
	longH = frame.args[4]
	local desc = lat .. latH .. ' ' .. long .. longH
	return frame:callParserFunction{ name = '#tag:maplink', args = {
    '{"type":"Feature","geometry":{"type":"Point","coordinates":[' .. long .. ',' .. lat ..']},"properties":{"marker-size":"medium","title":"Test","marker-color":"#228b22"}}', 
    zoom = 16, latitude=lat, longitude=long, text=desc
} }
end 
return coordinates