[GRASS-dev] creation of turntable

Moritz Lennert mlennert at club.worldonline.be
Mon Sep 30 09:20:31 PDT 2013

On 30/09/13 09:45, Štěpán Turek wrote:
> Hi,
> working on integration of turns support into GRASS 7 I see two
> possibilities how to integrate creation of the turntable.
> New module v.net.turntable can be added,which will manage creation of
> the turntable.
> There already exists v.net module which is doing maintenance and
> preparation of a network for a network analysis. Creation of the
> turntable can be considered also like preparation of network for
> analysis. Also in future it would be good to add into connect operation
> support for modification of the turntable. And this will require
> extension of the v.net interface for the turntable support.
> Suggestion of interface changes of v.net module:
> operation=turntable - create turntable (what v.net.turntable do)
> tlayer and tuclayer - two layers where information about turns is stored
> (for description see [1])
> - these two parameters would need to be added into v.net even if
> v.net.turntable would exist in order to be the connect operation able to
> adjust the turntable. Adding of these parameters could be avoided if
> another connect method would be implemented into v.net.turntable, but it
> would be probably quiet confusing for user.
> -t flag if this flag would be attached, the connect method would work
> with the turntable support
> On the other hand v.net module interface will become even more complex
> and it can become difficult to use by some users.

Even if the complexity might be increased (I don't find v.net _that_ 
complex at this point), I would go for the integration of turntables in 
v.net. It seems the logical place for everything concerning network 
preparation and maintenance. If complexity really becomes a problem, 
there is always the option of creating wrapper scripts which hide some 
of the complexity.


More information about the grass-dev mailing list