Thanks for checking, that's what I realized as well! Do you know if there is still a chance to include it for 3.0 or is it too late already?
Cheers Stéphane Le mercredi 11 janvier 2017, DelazJ <del...@gmail.com> a écrit : > Hi Stéphane, > > I gave it a look and I'm sorry I was wrong. There have been some work on > the raster classification but it was rather about color and extent > management. See https://github.com/qgis/QGIS/pulls?utf8=%E2%9C%93&q=is% > 3Apr%20discrete%20is%3Aclosed%20 or https://github.com/qgis/QGIS/ > pulls?utf8=%E2%9C%93&q=is%3Apr%20pseudocolor%20is%3Aclosed%20 but testing > upcoming 3.0 shows that nothing has changed in the area you are interested > in. > > Harrissou > > 2017-01-11 4:37 GMT+01:00 Stéphane Henriod <s...@henriod.info > <javascript:_e(%7B%7D,'cvml','s...@henriod.info');>>: > >> Hi Harrissou >> >> is there any description / documentation of the work that has been done >> on this (feature description, etc.)? If yes, I'd like to have a look and >> maybe >> >> Thanks a lot! >> >> Stéphane >> >> >> Le mardi 10 janvier 2017, DelazJ <del...@gmail.com >> <javascript:_e(%7B%7D,'cvml','del...@gmail.com');>> a écrit : >> >>> Hi Stéphane, >>> >>> 2017-01-10 4:02 GMT+01:00 Stéphane Henriod <s...@henriod.info>: >>> >>>> Hi Chris >>>> this is very nice! I indeed didn't know this trick and will certainly >>>> use it again in the future! >>>> >>>> However... :-) >>>> >>>> I am currently teaching QGIS to beginners and this for sure is not an >>>> appropriate method for them (especially in the case you have to generate >>>> the symbology file through a script)! >>>> >>>> Since the user can style continuous rasters with some >>>> "button-clicking", I believe the same option should be available for >>>> discrete rasters as well. >>>> >>>> I am thus wondering if anyone else than me sees it as a priority for >>>> QGIS? If yes, how to motivate the developers to take it for the next >>>> release and / or how much would such a development cost? (I unfortunately >>>> don't have the competences to do it myself) >>>> >>>> There have been some work done in the raster properties dialog in the >>> upcoming 3.0. I don't know if your concern was covered though. >>> If you want, you can move the question to the developer's list >>> <http://qgis.org/en/site/getinvolved/mailinglists.html#qgis-developers-list> >>> and discuss whether/how this can be implemented (and its requirements). >>> >>> Regards, >>> Harrissou >>> >>> Thanks again and cheers! >>>> >>>> Stéphane >>>> >>>> >>>> Le mardi 10 janvier 2017, Chris House <house...@gmail.com> a écrit : >>>> >>>>> Hi Stéphane, >>>>> >>>>> I don't know if this is what you are looking for or not but I have a >>>>> method of classifying rasters by color based on a set (standard) colors. >>>>> I >>>>> created a spreadsheet that has several required columns, value, red, >>>>> green, >>>>> blue...and you can have an optional field for a display value. So say >>>>> value 1 is water you can use that last column to name that value so that >>>>> in >>>>> the QGIS layer tree and in legend it says Water instead of value 1. >>>>> >>>>> save the spreadsheet as a csv and change the extension to .txt instead >>>>> of .csv. >>>>> >>>>> I then go into the symbology section of the raster choose singleband >>>>> pseudocolor. Use the folder to browse to your text file and click add. >>>>> There is a format for this text file. It is below. If you need me to >>>>> email it I will do that in direct email. >>>>> >>>>> # QGIS Generated Color Map Export File >>>>> INTERPOLATION:EXACT >>>>> -9999,0,0,0,255,NoData >>>>> 0,176,176,176,255,Non-Forested >>>>> 15,234,255,191,255,10 <= CC < 20 >>>>> 25,187,230,149,255,20 <= CC < 30 >>>>> 35,140,201,109,255,30 <= CC < 40 >>>>> 45,98,176,74,255,40 <= CC < 50 >>>>> 55,59,153,43,255,50 <= CC < 60 >>>>> 65,0,128,0,255,60 <= CC < 70 >>>>> 75,15,92,11,255,70 <= CC < 80 >>>>> 85,17,61,12,255,80 <= CC < 90 >>>>> 95,16,36,12,255,90 <= CC <= 100 >>>>> >>>>> In my example if I don't assign a value it gets ignored by QGIS. If >>>>> you are wondering how to assign unique colors to say 200 unique >>>>> values...just script it. I have done this and as long as you have the >>>>> number of unique values you want and to make them unique in the script it >>>>> works. >>>>> >>>>> I hope this helps. I know it isn't a "button" but to be honest I like >>>>> this better. If you already knew this...well then maybe it will help >>>>> someone out in the future. >>>>> >>>>> --Chris >>>>> >>>>> On Mon, Jan 9, 2017 at 3:00 PM, <qgis-user-requ...@lists.osgeo.org> >>>>> wrote: >>>>> >>>>>> Send Qgis-user mailing list submissions to >>>>>> qgis-user@lists.osgeo.org >>>>>> >>>>>> To subscribe or unsubscribe via the World Wide Web, visit >>>>>> http://lists.osgeo.org/mailman/listinfo/qgis-user >>>>>> or, via email, send a message with subject or body 'help' to >>>>>> qgis-user-requ...@lists.osgeo.org >>>>>> >>>>>> You can reach the person managing the list at >>>>>> qgis-user-ow...@lists.osgeo.org >>>>>> >>>>>> When replying, please edit your Subject line so it is more specific >>>>>> than "Re: Contents of Qgis-user digest..." >>>>>> >>>>>> >>>>>> Today's Topics: >>>>>> >>>>>> 1. Re: Symbolizing a discrete or a boolean raster (Stéphane >>>>>> Henriod) >>>>>> >>>>>> >>>>>> ------------------------------------------------------------ >>>>>> ---------- >>>>>> >>>>>> Message: 1 >>>>>> Date: Mon, 9 Jan 2017 23:07:36 +0600 >>>>>> From: Stéphane Henriod <s...@henriod.info> >>>>>> To: Enrico Fiore <enricofi...@libero.it> >>>>>> Cc: qgis-user <qgis-user@lists.osgeo.org> >>>>>> Subject: Re: [Qgis-user] Symbolizing a discrete or a boolean raster >>>>>> Message-ID: >>>>>> <cak6pvbxurm_e7drp+8sp9ampuux0+cn3gvxlpnjohhno85o...@mail.gm >>>>>> ail.com> >>>>>> Content-Type: text/plain; charset="utf-8" >>>>>> >>>>>> Hi >>>>>> >>>>>> thanks for following up! >>>>>> >>>>>> It actually does part of the job! >>>>>> >>>>>> Using *Color interpretation: Exact*, I can indeed input the exact >>>>>> values I >>>>>> want to display (1,5 and 10) and all other pixels are hidden. >>>>>> >>>>>> HOWEVER, >>>>>> >>>>>> this still feels like a workaround: >>>>>> >>>>>> - In the case of a discrete raster with many (> 50) unique values, >>>>>> I do >>>>>> not want to input all of them manually >>>>>> - In some cases, I do not know in advance all the unique values of >>>>>> my >>>>>> raster >>>>>> - If I click on *Classify*, QGIS will choose X values (based on the >>>>>> number of classes and the classification method (continuous or >>>>>> equal >>>>>> interval)), which no longer match the "exact" values of my raster. >>>>>> It >>>>>> doesn't really make sense to classify a discrete rendering >>>>>> >>>>>> So I would say, we still need a render type "discrete raster" which >>>>>> offers >>>>>> the function to "retrieve all unique values" (and automatically apply >>>>>> a >>>>>> discrete color ramp) >>>>>> >>>>>> Attached a (fake) test dataset. >>>>>> >>>>>> Thanks and cheers >>>>>> >>>>>> Stéphane >>>>>> >>>>>> >>>>>> Le lundi 9 janvier 2017, Enrico Fiore <enricofi...@libero.it> a >>>>>> écrit : >>>>>> >>>>>> > Hi, >>>>>> > Sorry I can't do test, but if you use exact in color interpolation >>>>>> > parameter? >>>>>> > >>>>>> > Cheers >>>>>> > >>>>>> > Enrico >>>>>> >>>>>> >>>>>> Le lundi 9 janvier 2017, Stéphane Henriod <s...@henriod.info> a écrit : >>>>>> >>>>>> > Hi >>>>>> > >>>>>> > unfortunately this is doing quite something different! >>>>>> > >>>>>> > If I have a raster with 10 Landcover classes (1,2,3,4,5,6,7,8,9,10) >>>>>> and I >>>>>> > want to display only 1,5 and 10, using *Discrete *(1: red, 5: >>>>>> yellow, 10: >>>>>> > blue) the following will happen: >>>>>> > >>>>>> > All pixels between 1 and 4 will be red >>>>>> > All pixels between 5 and 9 will be yellow >>>>>> > All pixels with 10 will be blue >>>>>> > >>>>>> > In this sense, the pixels are indeed not interpolated, but this >>>>>> still is >>>>>> > not the behavior I am expecting when styling discrete rasters. >>>>>> > >>>>>> > A "style discrete raster" function should offer the following: >>>>>> > >>>>>> > - Automatically recover all unique values from the raster >>>>>> > - Only display the pixels to which the user has explicitly >>>>>> assigned a >>>>>> > color >>>>>> > >>>>>> > But thanks for your hint, this can be helpful in other cases! >>>>>> > >>>>>> > Cheers >>>>>> > >>>>>> > Stéphane >>>>>> > >>>>>> > >>>>>> > Le lundi 9 janvier 2017, Enrico Fiore <enricofi...@libero.it >>>>>> > <javascript:_e(%7B%7D,'cvml','enricofi...@libero.it');>> a écrit : >>>>>> > >>>>>> >> Hi, >>>>>> >> I think that the solution is in the QGIS documentation, that you >>>>>> can read >>>>>> >> here: http://docs.qgis.org/2.14/en/docs/user_manual/working_with_r >>>>>> >> aster/raster_properties.html#band-rendering >>>>>> >> you have to use *Singleband pseudocolor *and set color >>>>>> interpolation to >>>>>> >> Discrete. >>>>>> >> >>>>>> >> Enrico >>>>>> >> >>>>>> >> >>>>>> >> ----Messaggio originale---- >>>>>> >> Da: "Stéphane Henriod" <s...@henriod.info> >>>>>> >> Data: 09/01/2017 6.30 >>>>>> >> A: "qgis-user"<qgis-user@lists.osgeo.org> >>>>>> >> Ogg: [Qgis-user] Symbolizing a discrete or a boolean raster >>>>>> >> >>>>>> >> Dear all >>>>>> >> >>>>>> >> As much as I love QGIS and use it in my everyday life, there is one >>>>>> >> feature that I find particularly annoying: the styling of discrete >>>>>> rasters. >>>>>> >> >>>>>> >> Basically, if I have a raster layer consisting of discrete >>>>>> landcover >>>>>> >> values (1: water, 2: forest, 3: built-up), it seems that there is >>>>>> no easy >>>>>> >> way to style it. QGIS will assume that the data is continuous and >>>>>> basically >>>>>> >> interpolate the color between each value, which leads to the >>>>>> following >>>>>> >> issues: >>>>>> >> >>>>>> >> Let's say I want to display only water and built-up (values 1 and >>>>>> 3), >>>>>> >> water in blue and built-up in grey. QGIS will still display the >>>>>> forests, >>>>>> >> using a color somewhere "between" blue and grey. My only left >>>>>> option is to >>>>>> >> process the raster to actually replace all the 2 with NoData, >>>>>> which is >>>>>> >> highly unpractical... >>>>>> >> >>>>>> >> Same if I have a boolean raster (only 0 and 1 values). QGIS will by >>>>>> >> default make a color ramp from 0 to 0.9999. >>>>>> >> >>>>>> >> Also, the whole rather feels like a work-around for a missing >>>>>> feature. >>>>>> >> >>>>>> >> I dream of a feature similar to this one from ArcGIS: >>>>>> >> http://resources.arcgis.com/en/help/main/10.1/index. >>>>>> >> html#/representing_unique_categories_such_as_land_use/009t00 >>>>>> 000074000000/ >>>>>> >> where all unique values are styled independently and where I can >>>>>> easily >>>>>> >> skip the values I don't want to see on my map. >>>>>> >> >>>>>> >> I asked a question here: >>>>>> >> http://gis.stackexchange.com/questions/194116/qgis-style-a-d >>>>>> >> iscrete-raster >>>>>> >> >>>>>> >> and opened a ticket here: >>>>>> >> http://hub.qgis.org/issues/14845 >>>>>> >> >>>>>> >> But none has gotten lots of attention yet... Am I the only one to >>>>>> be >>>>>> >> annoyed by this? If no, please raise your hand and let's try to >>>>>> get some >>>>>> >> momentum and see how to push this feature forward! >>>>>> >> >>>>>> >> Thanks a lot in advance! >>>>>> >> >>>>>> >> Cheers >>>>>> >> >>>>>> >> Stéphane >>>>>> >> >>>>>> >> >>>>>> > >>>>>> >>>>>> -- >>>>>> Stéphane Henriod >>>>>> CIM-Expert for GIS and Green Economy Statistics >>>>>> >>>>>> Национальный статистический комитет Кыргызской Республики >>>>>> Кыргыз Республикасынын Улуттук статистика комитети >>>>>> National Statistical Committee of the Kyrgyz Republic >>>>>> >>>>>> 374 Фрунзе ул. / Frunze str. >>>>>> 720033 Бишкек / Bishkek >>>>>> >>>>>> T +996 778 46 99 02 (KG) >>>>>> T +49 176 280 11 050 <+49%20176%2028011050> (DE) >>>>>> E s...@henriod.info >>>>>> W http://www.stat.kg >>>>>> W3W: nightfall.into.bucket >>>>>> <https://map.what3words.com/nightfall.into.bucket> // >>>>>> запас.союз.дружный >>>>>> <https://map.what3words.com/запас.союз.дружный> >>>>>> -------------- next part -------------- >>>>>> An HTML attachment was scrubbed... >>>>>> URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/2017 >>>>>> 0109/985fd14c/attachment-0001.html> >>>>>> -------------- next part -------------- >>>>>> A non-text attachment was scrubbed... >>>>>> Name: landcover.zip >>>>>> Type: application/zip >>>>>> Size: 2151 bytes >>>>>> Desc: not available >>>>>> URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/2017 >>>>>> 0109/985fd14c/attachment-0001.zip> >>>>>> >>>>>> ------------------------------ >>>>>> >>>>>> Subject: Digest Footer >>>>>> >>>>>> _______________________________________________ >>>>>> Qgis-user mailing list >>>>>> Qgis-user@lists.osgeo.org >>>>>> List info: http://lists.osgeo.org/mailman/listinfo/qgis-user >>>>>> Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user >>>>>> >>>>>> ------------------------------ >>>>>> >>>>>> End of Qgis-user Digest, Vol 131, Issue 13 >>>>>> ****************************************** >>>>>> >>>>> >>>>> >>>> >>>> -- >>>> Stéphane Henriod >>>> CIM-Expert for GIS and Green Economy Statistics >>>> >>>> Национальный статистический комитет Кыргызской Республики >>>> Кыргыз Республикасынын Улуттук статистика комитети >>>> National Statistical Committee of the Kyrgyz Republic >>>> >>>> 374 Фрунзе ул. / Frunze str. >>>> 720033 Бишкек / Bishkek >>>> >>>> T +996 778 46 99 02 (KG) >>>> T +49 176 280 11 050 <+49%20176%2028011050> (DE) >>>> E s...@henriod.info >>>> W http://www.stat.kg >>>> W3W: nightfall.into.bucket >>>> <https://map.what3words.com/nightfall.into.bucket> // >>>> запас.союз.дружный <https://map.what3words.com/запас.союз.дружный> >>>> >>>> >>>> _______________________________________________ >>>> Qgis-user mailing list >>>> Qgis-user@lists.osgeo.org >>>> List info: http://lists.osgeo.org/mailman/listinfo/qgis-user >>>> Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user >>>> >>> >>> >> >> -- >> Stéphane Henriod >> CIM-Expert for GIS and Green Economy Statistics >> >> Национальный статистический комитет Кыргызской Республики >> Кыргыз Республикасынын Улуттук статистика комитети >> National Statistical Committee of the Kyrgyz Republic >> >> 374 Фрунзе ул. / Frunze str. >> 720033 Бишкек / Bishkek >> >> T +996 778 46 99 02 (KG) >> T +49 176 280 11 050 <+49%20176%2028011050> (DE) >> E s...@henriod.info <javascript:_e(%7B%7D,'cvml','s...@henriod.info');> >> W http://www.stat.kg >> W3W: nightfall.into.bucket >> <https://map.what3words.com/nightfall.into.bucket> // >> запас.союз.дружный <https://map.what3words.com/запас.союз.дружный> >> >> >> > -- Stéphane Henriod CIM-Expert for GIS and Green Economy Statistics Национальный статистический комитет Кыргызской Республики Кыргыз Республикасынын Улуттук статистика комитети National Statistical Committee of the Kyrgyz Republic 374 Фрунзе ул. / Frunze str. 720033 Бишкек / Bishkek T +996 778 46 99 02 (KG) T +49 176 280 11 050 (DE) E s...@henriod.info W http://www.stat.kg W3W: nightfall.into.bucket <https://map.what3words.com/nightfall.into.bucket> // запас.союз.дружный <https://map.what3words.com/запас.союз.дружный>
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