[mapserver-users] Rendering of Symbols outside map window

[thomas bonfort]

Steve,
IIRC, we account for the size of symbols when adjusting our clipping
rectangle once we have obtained a feature, but we do not adjust the query
extent when doing whichshapes(). That's something we may want to fix.
Another use-case would also be when the DATA statement does something like
"ST_Buffer(the_geom,...) as the geom"

--
thomas

On 15 February 2016 at 17:44, Lime, Steve D (MNIT) <Steve.Lime at state.mn.us>
wrote:

> I know. We use to account for that explicitly.
>
> ------------------------------
> *From:* deduikertjes [deduikertjes at xs4all.nl]
> *Sent:* Monday, February 15, 2016 2:44 AM
> *To:* Lime, Steve D (MNIT); Patrick Meis
>
> *Cc:* mapserver-users at lists.osgeo.org
> *Subject:* Re: [mapserver-users] Rendering of Symbols outside map window
>
> Steve,
>
> I think the key part in the question is here:
>
> " and the center point of the symbol is no longer inside the map window".
> To my experience a symbol doesn't get drawn at all when the point which is
> symbolized is outside the requested extent (WMS mode at least).
>
> To solve that I created the mentioned pull request.
>
> Or do I miss something?
>
> MArco
>
>
> On 13-02-16 00:17, Lime, Steve D (MNIT) wrote:
>
> This should already be happening. The drawing code traverses a layer's
> class/styles to commute a selection and clipping rectangle that is larger
> than the map extent.
>
> ------------------------------
> *From:* mapserver-users [mapserver-users-bounces at lists.osgeo.org] on
> behalf of mdprive [deduikertjes at xs4all.nl]
> *Sent:* Friday, February 12, 2016 4:15 PM
> *To:* Patrick Meis
> *Cc:* mapserver-users at lists.osgeo.org
> *Subject:* Re: [mapserver-users] Rendering of Symbols outside map window
>
> Hi Patrick,
>
> i've submitted a pull request for extending the map by a buffer and then
> clipping it, so that partial symbols on the edge get rendered as well (wms
> non tiled mode).
>
> maybe you can build from sources and use this patch to solve your problem.
>
> marco
>
> --
>
>
> Op 11 feb. 2016 om 21:54 heeft Ambrogio Foletti < <afoletti at gmail.com>
> afoletti at gmail.com> het volgende geschreven:
>
> Hello Patrick,
>
> if you are using PostGIS as datasource, I would solve the problem by
> integrating a st_buffer in the DATA element itself ;) The added bonus is
> that you will get the attribute values from a GetFeatureInfo (if
> implemented) in the whole buffer zone.
> If not, you can try to use tile mode, and add some metabuffer (see
> mapserver doc <http://mapserver.org/output/tile_mode.html>)
>
> Cheers!
> A. Foletti
>
> 2016-02-05 10:58 GMT+01:00 Patrick Meis <Meis at stadt-muenster.de>:
>
>> Hallo,
>>
>>
>>
>> i have stumbled on a problem.
>>
>> I am simulating a buffering of point-data with the help of symbols, which
>> I have set to
>>
>> sizeunit = meters
>>
>> size = 760
>>
>>
>>
>> These rather big symbols disappear from my map when I zoom in and
>>
>> the center point of the symbol is no longer inside the map window.
>>
>> But a significant part of the symbol should still be displayed.
>>
>>
>>
>> Is there any possibility of extending the rendered map, so that the
>> symbols of my points
>>
>> are still rendered even when they are outside my map window?
>>
>>
>>
>> Greetz
>>
>> Patrick
>>
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>>
>
>
>
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