[mapserver-dev] RFC81: offset labels with leader lines

thomas bonfort thomas.bonfort at gmail.com
Fri Dec 16 12:00:55 EST 2011

Fanned labels (if I understand correctly what you mean by that) can only be
achieved, I believe, when using a global optimization over all the labels
to be rendered for the current map, which is not the way we do it actually,
i.e. for a given label we are only constrained by the labels that have been
previously rendered, and completely ignore all the labels that might be
coming afterwards.

Global optimization of label placement is not in the scope of this RFC, and
would be sufficiently disruptive that the current design decisions are
irrelevant imho.


On Fri, Dec 16, 2011 at 17:53, Bob Basques <Bob.Basques at ci.stpaul.mn.us>wrote:

>  Thomas,
>  Looks well thought out.  Just a comment here.
>  This seems like it might be overlapping technically with the idea of
> building fanned labels for stacked, or closely situated features.
>  Should/could this be added in as a design element now, or is this better
> off on it's own as a separate process?  Seems like all the same sorts of
> problems would arise when developing for fanned labels.
>  Maybe it's just the naming of things that's throwing me off,  and we're
> both talking about the same thing.  Coming from a CAD background Leaders
> mean something specific, as in, I have control over where a set of
> descriptors might be listed.  A draftsman might list all the label call
> outs down one side of a sheet and use leaders to each of the map features
> they are trying to label for example.
>  bobb
> >>> thomas bonfort <thomas.bonfort at gmail.com> wrote:
> devs,
> please have a look and comment on
> http://mapserver.org/trunk/development/rfc/ms-rfc-81.html
> best regards,
> thomas
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