[Qgis-user] Making border lines disappear

[David Fawcett]

You could also try to convert the underlying polygon dataset to polyline
for cartography purposes.  That gets rid of adjacent lines.  This was a
trick that I applied to get around strange effects with AGG in MapServer
quite a while ago.

David.


On Wed, Jul 30, 2014 at 2:39 PM, Alexandre Neto <senhor.neto at gmail.com>
wrote:

> A simple workaround (until it get fixed) could be to had a very thin
> border of the same colour/transparency of the fill.
>
> Alexandre Neto
> Em 30/07/2014 15:27, "Andreas Neumann" <a.neumann at carto.net> escreveu:
>
>> Hi,
>>
>> This is an anti aliasing issue that many rendering libraries have. I
>> doubt there is much the QGIS developers can do. It is beyond the control
>> of the QGIS developers and an upstream problem of the rendering in the
>> qt-library.
>>
>> The AGG rendering library solved this issue: see
>> http://www.antigrain.com/screenshots/ and search for "adjacent polygons"
>> in the text.
>>
>> I will forward this to the QGIS developers list.
>>
>> Andreas
>>
>> Am 30.07.2014 14:18, schrieb Jonathan Moules:
>> > Hi Frank,
>> > Thanks for confirming. Dissolving was the plan that the user was going
>> > to end up trying.
>> > For those interested, it's on the tracker as:
>> > http://hub.qgis.org/issues/10984
>> >
>> > Cheers,
>> > Jonathan
>> >
>> >
>> > On 30 July 2014 12:07, Frank Sokolic <sokolic at worldonline.co.za
>> > <mailto:sokolic at worldonline.co.za>> wrote:
>> >
>> >     Hi Jonathan,
>> >
>> >     I've been struggling with this too. Even if you set Border Width to
>> >     zero the borders are faintly visible. I hack I've used occasionally
>> >     is to dissolve the polygons using whatever attribute you're
>> >     categorising by but this is a far from ideal solution.
>> >
>> >     Frank.
>> >
>> ------------------------------------------------------------------------
>> >     *From:* jonathanmoules at warwickshire.gov.uk
>> >     <mailto:jonathanmoules at warwickshire.gov.uk>
>> >     *Sent:* 2014/07/30 12:53:25 PM
>> >     *To:* qgis-user at lists.osgeo.org <mailto:qgis-user at lists.osgeo.org>
>> >     *Cc:*
>> >     *Subject:* RE: [Qgis-user] Making border lines disappear
>> >
>> ------------------------------------------------------------------------
>> >     Hi List,
>> >     Using 2.4, how do you make borders on polygons invisible? Apparently
>> >     this worked fine in 2.2, but doesn't seem to be possible with 2.4.
>> >
>> >     Using the standard Simple Fill.
>> >
>> >
>> >     Border style: No Pen:
>> >     Inline images 1
>> >
>> >     Border Style: Solid Line; Border: Dark green (second across from the
>> >     Black) (fill: Same dark green):
>> >
>> >     Inline images 2
>> >     If you look closely you'll see white lines.
>> >
>> >     Anyone else seeing this? It was brought up by one of our more
>> >     observant users.
>> >
>> >     Cheers,
>> >     Jonathan
>> >
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