[mapserver-users] Constraining label position

[thomas bonfort]

PROCESSING "LABEL_NO_CLIP=yes"

--
thomas

On Mon, Feb 20, 2012 at 15:27, Jan Hartmann <j.l.h.hartmann at uva.nl> wrote:
>
>
> On 02/14/2012 06:17 PM, Stephen Woodbridge wrote:
>
> google: mapserver geomtransform
>
> this will let you fix the label point to the centroid of the object or some
> other positions.
>
> The issue is that the label point is generally calculated based on the
> geometry of the object as clipped to the view port. So the geometry changes
> based on the view clipping and this causes the label point to also change.
> the geomtransform works on the original data and so the label point becomes
> fixed.
>
>
> No I can't get this to work, perhaps I don't understand the syntax of
> geomtransform. Can you give me an example of fixing a label to the center
> point of a rectangle, without shifting it when the rectangle crosses the
> viewport? My mapfile looks:
>
> connectiontype postgis
> connection ""
> data the_rect from bnds
> labelitem rect_id
> style
>   color 0 0 0
> end
> label
>   color 0 0 255
> end
>
> I put a few geotransforms within the label and within the style objects, but
> the label always shifts near the margin of the viewport.
>
> Thanks,
>
> Jan
>
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