[OSM-Talk-ZA] N14

[Ray Booysen]

We had the same situation a few weeks ago with the N2 where a large section
(kynsna to Cape Town) was a single way.  Where it started in Cape Town, it
was edited and the user deleted a small part of the way which then in turn
deleted the entire way.

I think its been a given that on large larges such as the N2, N14, N1, we
have to split into smaller segments to allow for easier editing.  With such
large ways, most of the time you don't have the entire way downloaded  which
makes it difficult to see/fix mistakes.

Anyone else?

Regards
Ray

On 2/11/07, Nic Roets <nroets at gmail.com> wrote:
>
> We now have a substantial part of the N14 in segment form, namely
> Pretoria to Tarlton. (Everything we have Yahoo images for). The first
> part from Pretoria to Krugersdorp is double carriage and the second
> part from Krugersdorp to Tarlton is single carriage.
>
> So my gut feel for OSM says we must have 3 ways :
> (a) Single carriage way (N14)
> (b) Double carriage oneway way (N14 North) and
> (c) Double carriage oneway way (N14 South)
>
> I created (a) without problems, but I see someone has already split
> (b) and (c) into 2 pieces, namely at the interchange with the N1 (
> S25.87815 E28.16886 ), so I don't want to plunge ahead and change
> everything without hearing your views.
>
> Even though it's against my gut feel, I see only advantages to the
> current situation :
>
> (1) If N14 North is a single way and you are traveling from
> Kurgersdorp to Pretoria Central, then an automated routing program may
> not generate instructions that you must stay on the N14. But if it's
> split the routing program will may well tell you to "Step K: Get off
> the N14 North
> Step K+1: Get on the N14 North".
>
> I find it very counter intuitive when you must stay in the LEFT (slow)
> lane to stay on the same road. This also occurs with the N1 where the
> M1 and N3 begins / ends ( S26.04687 E28.09616 ).
>
> (2) The N14 South (seen as a single way) turns over itself at
> S25.87847 E28.16943.
> So we'll have to leave out a few segments and add them to a new way
> with a different layer to get the rendering correct.
>
> (3) Updating the N14 at a future date will be easier because it's
> easier to download all the segments of the way being modified.
>
> (4) It's closer to "Africa Road Atlas Ver 1" for Mapsource. They call
> the one section "N14 Ben Schoeman Highway" and the other section just
> "N14".
>
> Should I rather ask this question on the main list ?
>
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-- 
Ray Booysen
raybooysen at rjb.za.net
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