Re: [Qgis-developer] Question on inverted polygon renderer
Hi Bernard, plugin is coming this week I think. Bernhard Ströbl wrote Thinking about QGIS server: Would there be a chance to use what you describe to keep labels staying away from the edge of the requested map? Bernhard current implementation adds a In_mask(srid) expression, that can be used anywhere in style or labeling settings. If QGIs server fill current mask geometry with a bbox, slightly smaller than true extent, you will avoid drawing labels to close from the edges. I'm not sure this is the best design option, it sounds more like a hack to me. I will let Hugo explain detailed implementation. Cheers Régis -- View this message in context: http://osgeo-org.1560.x6.nabble.com/Question-on-inverted-polygon-renderer-tp5146099p5146226.html Sent from the Quantum GIS - Developer mailing list archive at Nabble.com. ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [Qgis-developer] Question on inverted polygon renderer
Here's a quick example of what the combination of inverted polygon and shapeburst fill can do: http://i.imgur.com/7n6rxJx.jpg Since shapeburst fill can use map-based units, the outer glows-like effect of polygons can be spatially relevant, i.e. in the above map, the glow could represent a specific distance, 2km, within which a growing impact on local population is to be expected. Math On Tue, Jun 17, 2014 at 4:15 AM, Nyall Dawson nyall.daw...@gmail.com wrote: On 17/06/2014 6:44 am, Régis Haubourg regis.haubo...@eau-adour-garonne.fr wrote: inverted style + shapeburst give crazy cool rendering! A quick tip if you're using shapeburst with inverted polygons - you must have the shade to a set distance option selected, and set a relatively small distance. Otherwise you'll see shading from the canvas edges (refs #10570, #9757). Mathieu Pellerin also has some nice examples of inverted shapeburst fills used to shade the exterior of polygons in a thematic map - i'm not sure if he's posted them on the flickr group yet. Nyall ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [Qgis-developer] Question on inverted polygon renderer
Hi, Le 17/06/2014 09:32, Régis Haubourg a écrit : Hi Bernard, plugin is coming this week I think. Yes, it is already available at https://github.com/Oslandia/mask_plugin A 1.0 version for the official qgis repository is on its way. Bernhard Ströbl wrote Thinking about QGIS server: Would there be a chance to use what you describe to keep labels staying away from the edge of the requested map? Bernhard current implementation adds a In_mask(srid) expression, that can be used anywhere in style or labeling settings. If QGIs server fill current mask geometry with a bbox, slightly smaller than true extent, you will avoid drawing labels to close from the edges. I'm not sure this is the best design option, it sounds more like a hack to me. I will let Hugo explain detailed implementation. Well, I don't know exactly what is the problem with the labeling part of the server. This label filtering feature has not been designed for such a use-case. The current implementation of atlas with mask relies on signals that are catched within a plugin to update the mask layer. We could imagine something similar for the server, but I agree that would be a hack. The problem you have might be somehow related to how qgis clips vectors before rendering them, as Nyall pointed out (http://hub.qgis.org/issues/9757) ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
[Qgis-developer] untranslatable strings
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi guys, the Italian GUI is 100% translated but I noticed that some strings of the GUI are still in English. For now I found: * Properties - Filed Tab - Edit widget. The title of the dialog window is in English * within the Edit widget dialog: * Photo tab - the string the field contains a filename is in English * Web tab - the string field contains a filename is in English Is this issue present also for other languages? Cheers Matteo -BEGIN PGP SIGNATURE- Version: GnuPG v1 Comment: Using GnuPG with Icedove - http://www.enigmail.net/ iQEcBAEBAgAGBQJToA+eAAoJEBy7UYf0gaEOwE0H/1rJxOyPINUcx4WEWS+23X0e vXcBLeAAHiFb9unH5ME1YmTA3ntp6U084iELPbpBEEGGRBUFz0i8ajyKytSYiALN ADGwbPXEn+E0DCviRWfcKsZHX5xSPfl94ZzJOar73+52XEZ0ewM6onCeQ+B85w0G ENY6pdNOYF8m3nQqVgqYp1fwcI2s+34RVgZWgjESJV+dNxH8P6UBppibj36raGpo enQCIo3pkJjVWeN9tLffBh1mqykI5PtYBO6IBCpKw1AYQTRkxnxYPwOFIvpC6nPU CxeBw7+wNLoleNxtGkQ+L9McqAA4eA3t4CFT/i4l8qCnHF98uuumLtXE8wSKaEM= =X3hG -END PGP SIGNATURE- ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [Qgis-developer] Question on inverted polygon renderer
Hi Hugo, let me explain: I use mapcache to preproduce tiles of my background layers rendered by QGIS server. Thus sometimes labels get cut because they are rendered too close to the edge of the requested map. I was attracted by Régis Label features of layers only for objects intersecting the mask region and was thinking if one could use that to address my problem, especially if it goes into core (needs to be for server I reckon). There won't be a dedicated mask layer, of course, but I imagined server creating the mask feature otf from the bbox parameter of the GetMap request (minus a distance set in OWS server tab). If you integrate this into core and there might be a chance to use it as I described I would be happy if you integrated it in a way that would allow to enhance QGIS server to use it. Bernhard Am 17.06.2014 10:22, schrieb Hugo Mercier: Hi, Le 17/06/2014 09:32, Régis Haubourg a écrit : Hi Bernard, plugin is coming this week I think. Yes, it is already available at https://github.com/Oslandia/mask_plugin A 1.0 version for the official qgis repository is on its way. Bernhard Ströbl wrote Thinking about QGIS server: Would there be a chance to use what you describe to keep labels staying away from the edge of the requested map? Bernhard current implementation adds a In_mask(srid) expression, that can be used anywhere in style or labeling settings. If QGIs server fill current mask geometry with a bbox, slightly smaller than true extent, you will avoid drawing labels to close from the edges. I'm not sure this is the best design option, it sounds more like a hack to me. I will let Hugo explain detailed implementation. Well, I don't know exactly what is the problem with the labeling part of the server. This label filtering feature has not been designed for such a use-case. The current implementation of atlas with mask relies on signals that are catched within a plugin to update the mask layer. We could imagine something similar for the server, but I agree that would be a hack. The problem you have might be somehow related to how qgis clips vectors before rendering them, as Nyall pointed out (http://hub.qgis.org/issues/9757) ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer __ Information from ESET Mail Security, version of virus signature database 9957 (20140617) __ The message was checked by ESET Mail Security. http://www.eset.com ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [Qgis-developer] Question on inverted polygon renderer
Hi Régis, Thank you for the explanations and for funding it! I think it is very cool, but as it is an unusual feature it probably needs a bit of explaining in the manual. Esp. if you combine it with the ShapeBurst fill. People need to understand that they are styling anything but the current / selected feature. Anyway - it is a powerful addition to QGIS. Andreas Am 16.06.2014 20:43, schrieb Régis Haubourg: Hi Andreas, I'm the funder, Hugo Mercier from Oslandia is the developper. It's the right time to do some teasing I guess ;-). The inverted polygon renderer idea appeared when writing specifications for an improved mask tool . We will soon release new version of mask plugin that allows the following: - generate a ROI layer from current polygon selection, or from another plugin's call. - Label features of layers only for objects intersecting the mask region (several spatial operators inside). Users wish that a lot to do professional mapping. Unwanted side effect is that labeling is a lot more readable by giving more affordable space to labeling engine. - Automagically reuse current mask style to generate a mask on the fly on Atlas coverage feature. inverted style + shapeburst give crazy cool rendering! Another positive point, instead of making a big bbox with a hole, as current mask plugin does, an inverted style allowed a much cleaner solution, and sounded a lot more reusable. And now, it's much more clear for the user to be able to zoom to the layer extent and not be zoomed out far away. We were unsure about real performances of such spatial filtering, so we decided to start with a plugin, and share with you.. And, we found that filtering labels gives less work to pal engine, so the spatial intersection seems to be less consuming than labeling, for average layers. Many thanks to Oslandia Team and Hugo for the hard work. We're about to release the plugin, Hugo will launch a thread about this, and maybe a port to core, if you like it. I already see what we could do next, like label features only on the parts really intersecting that ROI.. Stay tuned! Régis -- View this message in context: http://osgeo-org.1560.x6.nabble.com/Question-on-inverted-polygon-renderer-tp5146099p5146162.html Sent from the Quantum GIS - Developer mailing list archive at Nabble.com. ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [Qgis-developer] Question on inverted polygon renderer
I just released the mask plugin version 1.0 in qgis repository. I'll be glad to have some feedback on it. We still need to document it, what will be done in github dedicated wiki. Documenting inverted polygon renderer should be done in qgis main doc. How do we proceed to add sections in it? Cheers, Régis -- View this message in context: http://osgeo-org.1560.x6.nabble.com/Question-on-inverted-polygon-renderer-tp5146099p5146281.html Sent from the Quantum GIS - Developer mailing list archive at Nabble.com. ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [Qgis-developer] Testing/Master renders 7times slower than 2.2
Hi Anita I am a bit late to join the discussion, but anyway... I cannot really replicate the slowness you are experiencing. I can see some slowdown which I assume is mainly related to the labeling - in 2.4 there have been some changes that will likely slow down labeling even more - e.g. checking of validity of polygons (due to issues with invalid polygons from simplification) and the subsequent fixing with buffer. For a good comparison, I would suggest to have a look where the slowness really comes from. Apart from labeling, there could be many more factors affecting the speed - data-defined symbology, expressions in rule-based renderer, used symbol layers, reprojections etc. Generally speaking, we should try to handle the performance regressions more seriously - in the process of adding new features it is easy to introduce something that negatively affects the rendering speed. Radim has done some effort to build a benchmarking system for QGIS some time ago, maybe it is time to bring it back to life and start watching it more closely. Btw. nice project for testing purposes. The multipolygons layer contains a bunch of invalid geometries, it helped to find bugs in some of the new features :-) Regards Martin On Sun, Jun 1, 2014 at 7:49 PM, Anita Graser anitagra...@gmx.at wrote: Hi, I have a project with Spatialite and Shapefile layers and I found that it's around 7times slower to render in the current test version than in 2.2. The project is online, so you can try it yourself: https://drive.google.com/folderview?id=0Bwc-5JFVTnfIZkZOM3Y0Um9jOHcusp=sharing I've tried different rendering options including parallel rendering but found no way to improve the rendering speed in Testing. I'd love to know if it's a general problem or if I have misconfigured something. Best wishes, Anita ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
[Qgis-developer] Use GEOS reentrant API (_r functions) and update requirement to GEOS = 3.1.0
Hi, I've submitted the following (big in terme of lines changed, but mostly boring) pull request https://github.com/qgis/QGIS/pull/1461 : Currently QGIS uses the 'classic' GEOS API that uses a global context. This can conflict with libraries that would also use the global context and potentially finalize it whereas QGIS will still use it later. See https://groups.google.com/forum/#!topic/spatialite-users/9YSU6c5AVQ4 for such an example of such a recent issue with Spatialite. The _r API is available since GEOS 3.1.0, which is already an ancient GEOS version. For example, old-old-stable Ubuntu (Lucid 10.04) and Debian (squeeze) ship with GEOS 3.1.0 or later. Such move has also been done in GDAL 1.11 (http://lists.osgeo.org/pipermail/gdal-dev/2013-August/036877.html) and MapServer 7.0 (mapserver/mapserver#4733) There's no easy way unfortunately to check at compile time that you don't use the non _r API. I have patched my geos_c.h header to #ifdef that API (quite painfull to do..). A postprocessing check can be done however with : objdump -T output/lib/*.so | grep -v Base | grep GEOS | grep -v _r | grep -v _ZN | grep -v GEOSversion It should return nothing. To test the conditional branches on GEOS versions for advanced GEOS features, compile-tested by simulating GEOS 3.1.0 and GEOS 3.4.2 One thing that comes to mind is if QGIS might use GEOS concurrently from multiple threads. If so, then this patch will not improve (nor worsen) the situation with respect to potential problems that might arise from that. Even -- Geospatial professional services http://even.rouault.free.fr/services.html ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
