[mkgmap-dev] Regression: Revision 2448 breaking routing in some cases

Thu Jan 31 19:29:33 GMT 2013

Hi

Each road has an entry in the NET section that lists the
line(s) that make it up. The lines are specified by subdivision
number and the index of the line in the subdivision.

In turn, inside the RGN section are the actual lines ordered
by subdivision/index which contain a pointer back to the
NET road-def section.

In the broken map these are out-of-step. There are only a small
number of subdivisions that are faulty, but most of the roads in
the affected subdivs show the problem.

I have written a program to cross check between RGN and GET. It is
test.check.CheckNet in the display project.

It is not immediately obvious why this is happening as the
changes that we are suspecting seem to occur well before
subdivisions are created.

But perhaps I am misreading the code, anything that removes a line
after the RoadDef's are created might be the problem.

..Steve