Gardellia Mainline Code Format History

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The Gardellia Mainline Codes are sometimes the identifier of a Gardellia Mainline station, mostly used for unclaimed ones. Mainline codes beared two formats so far, informally referred to as old and new.

Old format

Map of Gardellia Mainlines bearing old codes (Dated 2016)

What is informally being referred to as old codes are the first version of mainline codes in Gardellia. They consist in most lines by three parts:

1. The line colour letter (eg Y for yellow line);
2. The cardinal direction (N or S only among the old coded lines);
3. The number of stations apart fcrom Gardellia Main ( CC ), except for Green line, which is divided into North being from  GN1  Clexio Bay going west and South from  GS1  Parramatta going east, and a station between the two,  GC , was to be constructed (but it never happened).

There are three exceptions within the old coded lines to this scheme:

1. The Orange line old codes count from  OX1  Caerdyfrdwy going towards Gardellia Main, which Orange line old code is  OX8 , but the most used became the general one,  CC .
2. The Pink line old codes count stations from Clexio Bay ( P0 ) south to Gardellia Main ( PS14 , fallen in favour of  CC , like  OX8 ), and north to Sandridge ( PN10 ).
3. The northern part of the Pink line, also referred to as the Brown line, has two old codes: The one from the Pink line, plus the same code but with "PN" replaced with "GE", this concurrency is present also in Clexio Bay ( GE  instead of GE0).

New format

Latest map of Gardellia Mainlines, currently bearing new codes (Dated December 2019)

On early July, 2019, the President announced a new format<ref>From his announcement in server discord: "A redesign of the existing stn code system is necessary to keep up with the future upcoming lines of Gardellia."</ref>. A poll was put on and, with an almost unanimous opinion, the new format comprises of:

1. A line name, which, differently from old codes, is two letters long (eg NW), separated by a dash from the rest;
2. A cardinal direction, that in some lines it is the same as the code's old counterpart, in other lines it may be different either partially or full scale;
3. A number which, if the line serves Gardellia Main ( GC ), counts the stations apart;

To this last part there are three exceptional lines:

1. The Circular Line starts counting from  CC-N1  Caerdyfrdwy, going northeastwards until  CC-N21  Furthrat. The next station is numbered as  CC-S1  and so on until (not yet constructed beyond  CC-S7 ) Caerdyfrdwy, forming a circular path as the name suggests.
2. The Northeastern Bypass counts from  NB-N1  Clexio Bay Central, going eastwards. This numeration is going to change due to another extension bringing it further north than  NB-N12 , where the numeration will likely start.
3. For Onenorth line,  ON-W1  is used for Ikenhield and  ON-E1  being the next going east.
4. None of the three stated lines have a station 0.

How to convert one format to the other

Here is a table comparing old and new code counterparts:

Old Format	New Format
CC	GC
B...	NW-...
R...	NE-...
Y...	CP-...
GNx (1≤x≤11)	CC-N(12-x)
GNx (x≥12)	No counterpart
GC	CC-N12
GSx (1≤x≤9)	CC-N(12+x)
GSx (x≥10)	CC-S(x-9)
GE P0	NC-N14
GEx PNx	NC-N(14+x)
PSx	NC-N(14-x)
OX1	IS-N8
No counterpart	IS-N7
OXx (x≥2)	IS-N(8-x)
No counterpart	NB-...
No counterpart	ON-...