Support Topology for pgrouting

[DuyTan]

If you have a shapfile table of streets and import into postgreSQL. In table include colums folow: X1, Y1,X2,Y2.
To can use pgrouting, topology need to add columns: source(interger), target(interger), length(numberic)
Length column can use length of 'the_geom' column.
It is dificuty to udate 'source' and 'target' columns.

You can create name 2 colums.It will help you to write source and target into db postgres by program folowing.

[DuyTan]

User Interfcae use easly

[DuyTan]

This is a alias from point(x,y) to a interger number. If it is useful and you want to deverlope my algorithm. I can send code for that

[anton]

Moved to 1.1