[mapserver-users] Labeling behavior at the edge of image

[Lime, Steve D (DNR)]

MINFEATURESIZE is used only for labeling and makes sense when a polygons are clipped. It
allows you avoid labeling slivers.

Steve


-----Original Message-----
From: Jackey Cheung [mailto:cheung.jackey at gmail.com] 
Sent: Thursday, January 19, 2012 6:52 PM
To: Lime, Steve D (DNR)
Cc: mapserver-users at lists.osgeo.org
Subject: Re: [mapserver-users] Labeling behavior at the edge of image

Hi Steve,

Thanks for you promptly reply. I've definitely try "label_no_clip"
out. However, I don't think the MINFEATURESIZE if for me. The polygon
as a whole is big enough for labeling, the problem is just that it's
sliced into two parts. Having a min size limit on it may render the
label gone at the edge, which is not the desire result.


On Thu, Jan 19, 2012 at 10:26 PM, Lime, Steve D (DNR)
<Steve.Lime at state.mn.us> wrote:
> You can use the "label_no_clip" (I think that's right) PROCESSING parameter to force label position to be computed on the untransformed geometry. This results in a stable position regardless of scale or map extent.
>
> You can also use the label parameter MINFEATURESIZE to limit the size of the features being labeled. Its value is given in pixel and for polygons its compared against the narrowest portion of the computed bounding box for the feature.
>
> Steve
>
> ________________________________________
> From: mapserver-users-bounces at lists.osgeo.org [mapserver-users-bounces at lists.osgeo.org] on behalf of Jackey Cheung [cheung.jackey at gmail.com]
> Sent: Thursday, January 19, 2012 3:49 AM
> To: mapserver-users at lists.osgeo.org
> Subject: [mapserver-users] Labeling behavior at the edge of image
>
> Hi all,
>
> I've met an issue during my work. There is a polygon right at the edge
> of an generated image. By setting position to auto, the label is
> rendered, shifted a little bit off. It's as expected I would say.
> However, a question arose immediately, what happen to the label of the
> other part of the same polygon in the tile right next to this image?
> Answer is that it's not render, no label to the other part. It seems
> reasonable too. But it does seems a bit odd to viewers, since after
> tiles are shown on a browser tile by tile side by side. No one will
> notice that there is the edge slicing the polygon right into two
> parts, and the label is shifted off from the center of the polygon.
> So, if I would like to have the label sits right at the middle
> (position cc) of the polygon, then what?
>
> Not sure if it can be achieved. I've tried allowing partial label, but
> doesn't seem working. Anyone have any idea?
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