- GEOGIS
GEOGIS is an infrastructure database used by
Network Rail [http://www.rail-reg.gov.uk/server/show/ConWebDoc.8028|1] .GEOGIS uses the following codes for four-digit Track IDs to identify which line at any location is referred to.
First number - Track Direction
1 Up
2 Down
3 Reversible / Bi-directional
4 Merry Go Round Loop
Second number - Track Use
1 Main or Fast etc
2 Slow or Local or Relief etc
3 Goods
4 Single line
5 Loop
6 Terminal or Bay
7 Crossover
8 Other or Engine etc
9 Single Siding
3rd & 4th number - Track Number
Usually numbered sequentially. Can be any number 00 to 99 inclusive.
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