<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12pt"><div><span>I agree, It is not possible, or very costly, detect if a point has </span><span style="font-size: 12pt;">semi transparent symbol</span></div><div style="color: rgb(0, 0, 0); font-size: 12pt; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span style="font-size: 12pt;">Maybe, new Point layers should have the simplification disabled by default</span></div><div><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;">Alvaro</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial,
'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><br></div><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; margin-top: 5px; padding-left: 5px;"> <div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 12pt;"> <div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 12pt;"> <div dir="ltr"> <hr size="1"> <font size="2" face="Arial"> <b><span style="font-weight:bold;">De:</span></b> Tim Sutton <lists@linfiniti.com><br> <b><span style="font-weight: bold;">Para:</span></b> Mathieu Pellerin <nirvn.asia@gmail.com> <br><b><span style="font-weight: bold;">CC:</span></b> QGIS Developer <qgis-developer@lists.osgeo.org>; A Huarte <ahuarte47@yahoo.es> <br> <b><span style="font-weight: bold;">Enviado:</span></b> Martes 21 de enero de 2014 6:01<br> <b><span
style="font-weight: bold;">Asunto:</span></b> Re: [Qgis-developer] On the fly simplication of point layers<br> </font> </div> <div class="y_msg_container"><br><div id="yiv4672398269"><div><div dir="ltr">Hi</div>
<div dir="ltr">Sent from my mobile <br clear="none">
On 21 Jan 2014 3:10 AM, "Mathieu Pellerin" <<a rel="nofollow" shape="rect" ymailto="mailto:nirvn.asia@gmail.com" target="_blank" href="mailto:nirvn.asia@gmail.com">nirvn.asia@gmail.com</a>> wrote:<br clear="none">
><br clear="none">
> Also, that logic can only be applied for fully opaque point symbols. As soon as you have a semi transparent symbol, the repetition of points over a same map pixel does matter and needs to be preserved.</div>
<div dir="ltr">Agreed but in that case surely you would just disable simplification?</div>
<div dir="ltr">Regards<br clear="none"></div>
<div dir="ltr">Tim </div><div class="yiv4672398269yqt1348341702" id="yiv4672398269yqtfd31663"><br clear="none">
><br clear="none">
> On 21 Jan 2014 07:46, "A Huarte" <<a rel="nofollow" shape="rect" ymailto="mailto:ahuarte47@yahoo.es" target="_blank" href="mailto:ahuarte47@yahoo.es">ahuarte47@yahoo.es</a>> wrote:<br clear="none">
>><br clear="none">
>> Ok, I will study it<br clear="none">
>><br clear="none">
>>><br clear="none">
>>> If you have time and inclination this would be great (note feature freeze starts in 4 days). A logical starting may be to only return one point per map pixel though I am not sure if you can push that kind of logic over to provider side very easily.<br clear="none">
>>><br clear="none">
>>> Regards<br clear="none">
>>><br clear="none">
>>> Tim<br clear="none">
>>> <br clear="none">
>>>><br clear="none">
>>>><br clear="none">
>>>><br clear="none">
>>>>> ________________________________<br clear="none">
>>>>> De: Tim Sutton <<a rel="nofollow" shape="rect" ymailto="mailto:lists@linfiniti.com" target="_blank" href="mailto:lists@linfiniti.com">lists@linfiniti.com</a>><br clear="none">
>>>>> Para: A Huarte <<a rel="nofollow" shape="rect" ymailto="mailto:ahuarte47@yahoo.es" target="_blank" href="mailto:ahuarte47@yahoo.es">ahuarte47@yahoo.es</a>> <br clear="none">
>>>>> CC: qgis-developer <<a rel="nofollow" shape="rect" ymailto="mailto:qgis-developer@lists.osgeo.org" target="_blank" href="mailto:qgis-developer@lists.osgeo.org">qgis-developer@lists.osgeo.org</a>> <br clear="none">
>>>>> Enviado: Lunes 20 de enero de 2014 22:57<br clear="none">
>>>>> Asunto: Re: [Qgis-developer] On the fly simplication of point layers<br clear="none">
>>>>><br clear="none">
>>>>> Hi<br clear="none">
>>>>><br clear="none">
>>>>><br clear="none">
>>>>> On Mon, Jan 20, 2014 at 11:47 PM, A Huarte <<a rel="nofollow" shape="rect" ymailto="mailto:ahuarte47@yahoo.es" target="_blank" href="mailto:ahuarte47@yahoo.es">ahuarte47@yahoo.es</a>> wrote:<br clear="none">
>>>>>><br clear="none">
>>>>>> done:<br clear="none">
>>>>>> <a rel="nofollow" shape="rect" target="_blank" href="https://github.com/qgis/QGIS/pull/1093">https://github.com/qgis/QGIS/pull/1093</a><br clear="none">
>>>>>><br clear="none">
>>>>>> This patch hides the simplification rendering tab for point layers, now it is not supported (internally I am not trying to simplify point layers). Thanks Tim!<br clear="none">
>>>>>><br clear="none">
>>>>>> About if there is a use case for point simplification, I know one, (gvSIG + dielmo open lidar) use it for load extreme big point layers as LiDAR LAS files are.<br clear="none">
>>>>>><br clear="none">
>>>>>> It know the code in java and I think easy migrate to QGIS. Basically, It ignore points by distance in a similar style as the current simplifier classes.<br clear="none">
>>>>><br clear="none">
>>>>><br clear="none">
>>>>> Sorry I see my original email was not very clear - I meant if there was a use case for point simplification as *currently implemented in master* - I fully agree that filtering proximal points would be a good performance booster, as would providing a point clustering capability. <br clear="none">
>>>>> <br clear="none">
>>>>>><br clear="none">
>>>>>><br clear="none">
>>>>>> If you think good for QGIS I think but I can imlement it<br clear="none">
>>>>><br clear="none">
>>>>><br clear="none">
>>>>> That would be great! Thanks for your pull request.<br clear="none">
>>>>><br clear="none">
>>>>> Regards<br clear="none">
>>>>><br clear="none">
>>>>> Tim<br clear="none">
>>>>> <br clear="none">
>>>>>><br clear="none">
>>>>>> .<br clear="none">
>>>>>> Alvaro<br clear="none">
>>>>>><br clear="none">
>>>>>>> ________________________________<br clear="none">
>>>>>>> De: Tim Sutton <<a rel="nofollow" shape="rect" ymailto="mailto:lists@linfiniti.com" target="_blank" href="mailto:lists@linfiniti.com">lists@linfiniti.com</a>><br clear="none">
>>>>>>> Para: qgis-developer <<a rel="nofollow" shape="rect" ymailto="mailto:qgis-developer@lists.osgeo.org" target="_blank" href="mailto:qgis-developer@lists.osgeo.org">qgis-developer@lists.osgeo.org</a>> <br clear="none">
>>>>>>> Enviado: Lunes 20 de enero de 2014 21:29<br clear="none">
>>>>>>> Asunto: [Qgis-developer] On the fly simplication of point layers<br clear="none">
>>>>>>><br clear="none">
>>>>>>> Ok I guess you can see where I am going to go with this email :-) Is there any point to allowing users to simplify point layers? Alvaro, can your remove the point rendering tab in layer properties (and I guess check internally that you are not trying to simplify point layers)? Or is there a use case for point simplification that I am not getting?<br clear="none">
>>>>>>><br clear="none">
>>>>>>> Regards<br clear="none">
>>>>>>><br clear="none">
>>>>>>> Tim<br clear="none">
>>>>>>><br clear="none">
>>>>>>> -- <br clear="none">
>>>>>>> Tim Sutton - QGIS Project Steering Committee Member<br clear="none">
>>>>>>> ==============================================<br clear="none">
>>>>>>> Please do not email me off-list with technical<br clear="none">
>>>>>>> support questions. Using the lists will gain<br clear="none">
>>>>>>> more exposure for your issues and the knowledge<br clear="none">
>>>>>>> surrounding your issue will be shared with all.<br clear="none">
>>>>>>><br clear="none">
>>>>>>> Irc: timlinux on #qgis at <a rel="nofollow" shape="rect" target="_blank" href="http://freenode.net/">freenode.net</a><br clear="none">
>>>>>>> ==============================================<br clear="none">
>>>>>>><br clear="none">
>>>>>>> _______________________________________________<br clear="none">
>>>>>>> Qgis-developer mailing list<br clear="none">
>>>>>>> <a rel="nofollow" shape="rect" ymailto="mailto:Qgis-developer@lists.osgeo.org" target="_blank" href="mailto:Qgis-developer@lists.osgeo.org">Qgis-developer@lists.osgeo.org</a><br clear="none">
>>>>>>> <a rel="nofollow" shape="rect" target="_blank" href="http://lists.osgeo.org/mailman/listinfo/qgis-developer">http://lists.osgeo.org/mailman/listinfo/qgis-developer</a><br clear="none">
>>>>>>><br clear="none">
>>>>>>><br clear="none">
>>>>><br clear="none">
>>>>><br clear="none">
>>>>><br clear="none">
>>>>> -- <br clear="none">
>>>>> Tim Sutton - QGIS Project Steering Committee Member<br clear="none">
>>>>> ==============================================<br clear="none">
>>>>> Please do not email me off-list with technical<br clear="none">
>>>>> support questions. Using the lists will gain<br clear="none">
>>>>> more exposure for your issues and the knowledge<br clear="none">
>>>>> surrounding your issue will be shared with all.<br clear="none">
>>>>><br clear="none">
>>>>> Irc: timlinux on #qgis at <a rel="nofollow" shape="rect" target="_blank" href="http://freenode.net/">freenode.net</a><br clear="none">
>>>>> ==============================================<br clear="none">
>>>>><br clear="none">
>>>>><br clear="none">
>>><br clear="none">
>>><br clear="none">
>>><br clear="none">
>>> -- <br clear="none">
>>> Tim Sutton - QGIS Project Steering Committee Member<br clear="none">
>>> ==============================================<br clear="none">
>>> Please do not email me off-list with technical<br clear="none">
>>> support questions. Using the lists will gain<br clear="none">
>>> more exposure for your issues and the knowledge<br clear="none">
>>> surrounding your issue will be shared with all.<br clear="none">
>>><br clear="none">
>>> Irc: timlinux on #qgis at <a rel="nofollow" shape="rect" target="_blank" href="http://freenode.net/">freenode.net</a><br clear="none">
>>> ==============================================<br clear="none">
>>><br clear="none">
>>><br clear="none">
>><br clear="none">
>> _______________________________________________<br clear="none">
>> Qgis-developer mailing list<br clear="none">
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