Re: [Qgis-user] Raster Layer Symbology Problem

[Sebastian Gutwein]

Martin,
The link that Alessandro provided was indeed the ability to revert back to
the previous discrete method. https://github.com/qgis/QGIS/pull/42193
As the pull request has a Backport 3.18 flag on it I assume that that means
that for the 3.18.1 release next week there should be the ability to turn
off continuous raster legend!
-Bas

On Fri, Mar 12, 2021 at 6:30 AM Martin Bittens 
wrote:

> Hello Sebastian,
>
> thank you for your response. Yes indeed, for me the coloring style you
> showed would be an option. This style is what I get in GRASS GIS as well.
> But😁,
>
> what I would prefer in QGIS is this (as provided by QGIS 3.16.4 LTR):
>
>
> So I hope that in future QGIS versions, the user will have the choice
> between the different display options. As far as I understood the
> discussions in the links you sent there is something going on in order to
> add an option for selecting the new  or the old display style.
> Unfortunately, I am not an expert in that programming stuff and therefore I
> don't know how to apply what there is explained. I will wait and see what
> the next QGIS versions offer for displaying raster gradient legends. And I
> will keep the QGIS 3.16.4 LTR with special care not loosing the display
> style I showed above.
>
>
> Regards
>
>
> Martin
>
>
> Am 3/10/2021 um 5:54 PM schrieb Sebastian Gutwein:
>
> Martin,
> I agree with your assessment.
> I assume the assumption of the designers (thank you Nyall Dawson et al for
> all of your amazing work) was that if you were displaying a
> continuous raster you would want a continuous legend as well.
> As shown by your issue and in the links I shared with you the reality is
> that this doesn't fit all use cases.
> I am considering writing up a feature request to address those issues.
> Unless you want to?
> To help me understand your use case more would a legend that was
> continuous but had numerical values at each "break" work for you? An
> example of this is in this tutorial
> https://www.ecodiv.earth/post/legend-for-continuous-raster-in-qgis-composer/
> [image: image.png]
>
> -Bas
>
> On Wed, Mar 10, 2021 at 2:34 PM Martin Bittens 
> wrote:
>
>> Sebastian, Bernd,
>>
>> thanks a lot for your response. I checked the links Sebastian sent. As
>> far as I could see displaying data in the legend as a continuum is a new
>> feature in QGIS 3.18 which replaced the previous method displaying data in
>> the legend as categories (as QGIS 3.16.4 is still doing - fortunately.
>> Otherwise it would be difficult producing maps in ongoing projects in a
>> consistent layout). And obviously there is no option available switching
>> between the old and the new display method. Personally I think it was not a
>> good decision giving up completely the categorical display in the legend.
>> In particular if you would work with multiple colors and a large range of
>> values, there is no way to allocate map colors to the corresponding values,
>> or vice versa.
>>
>> So, I hope that the next QGIS version will include an option which allows
>> selecting the method how to  display the data, as continuum or categorized.
>>
>>
>> Regards
>>
>> Martin
>>
>>
>> Am 3/9/2021 um 4:18 PM schrieb Sebastian Gutwein:
>>
>> Martin,
>> I think this may be the result of the new feature
>> https://qgis.org/en/site/forusers/visualchangelog318/#feature-gradient-ramp-based-legends
>> Which is exciting for me becasue that is how I would like to have my
>> continious data display. But it sounds like that is not what you are
>> interested in. I have not tried 3.18 myself so don't know if there is a
>> workaround.
>> It does look like there are some links to discussions in the comments of
>> this stack exchange question.
>> gis.stackexchange.com/questions/388843/qgis-3-18-override-raster-gradient-legends
>>
>> gis.stackexchange.com/questions/388154/how-to-get-back-discrete-raster-legend-symbols-in-qgis-3-16
>> twitter.com/ThomasG77/status/1365255399927140355
>>
>>
>> On Tue, Mar 9, 2021 at 7:54 AM Bernd Vogelgesang <
>> bernd.vogelges...@gmx.de> wrote:
>>
>>> Without testing I would say it's a bug. Quite some bugs went into 3.18
>>> unnoticed and unfortunately, it's not  communicated on the landing page.
>>> Next regular point release will be in 10 days, but for urgent stuff, you
>>> should better use 3.16.
>>>
>>>
>>> On 09.03.21 13:32, Martin Bittens wrot:
>>> > Hello QGIS User List, i
>>> >
>>> > I already sent this message but it was not posted, so it is here again.
>>> > Hopefully it works now.
>>> >
>>> >
>>> > I am still struggling with the problem creating a legend for a raster
>>> > layer. Usually I am working with the following settings in order to
>>> > colorize a calculated raster layer (e.g. after applying v.surf.idw on a
>>> > point data set):
>>> >
>>> > - rendering type: singleband pseudocolor
>>> >
>>> > - interpolation: linear
>>> >
>>> > - mode: equal interval
>>> >
>>> >
>>> > In QGIS 3.18.0:
>>> >
>>> > Selecting an appropriate color ramp and applying a classification

Re: [Qgis-user] Raster Layer Symbology Problem

[Martin Bittens]

Hello Sebastian,

thank you for your response. Yes indeed, for me the coloring style you
showed would be an option. This style is what I get in GRASS GIS as
well. But😁,

what I would prefer in QGIS is this (as provided by QGIS 3.16.4 LTR):


So I hope that in future QGIS versions, the user will have the choice
between the different display options. As far as I understood the
discussions in the links you sent there is something going on in order
to add an option for selecting the new  or the old display style.
Unfortunately, I am not an expert in that programming stuff and
therefore I don't know how to apply what there is explained. I will wait
and see what the next QGIS versions offer for displaying raster gradient
legends. And I will keep the QGIS 3.16.4 LTR with special care not
loosing the display style I showed above.


Regards


Martin


Am 3/10/2021 um 5:54 PM schrieb Sebastian Gutwein:

Martin,
I agree with your assessment.
I assume the assumption of the designers (thank you Nyall Dawson et al
for all of your amazing work) was that if you were displaying a
continuous raster you would want a continuous legend as well.
As shown by your issue and in the links I shared with you the reality
is that this doesn't fit all use cases.
I am considering writing up a feature request to address those issues.
Unless you want to?
To help me understand your use case more would a legend that was
continuous but had numerical values at each "break" work for you? An
example of this is in this tutorial
https://www.ecodiv.earth/post/legend-for-continuous-raster-in-qgis-composer/

image.png

-Bas

On Wed, Mar 10, 2021 at 2:34 PM Martin Bittens mailto:martin.bitt...@gmx.de>> wrote:

Sebastian, Bernd,

thanks a lot for your response. I checked the links Sebastian
sent. As far as I could see displaying data in the legend as a
continuum is a new feature in QGIS 3.18 which replaced the
previous method displaying data in the legend as categories (as
QGIS 3.16.4 is still doing - fortunately. Otherwise it would be
difficult producing maps in ongoing projects in a consistent
layout). And obviously there is no option available switching
between the old and the new display method. Personally I think it
was not a good decision giving up completely the categorical
display in the legend. In particular if you would work with
multiple colors and a large range of values, there is no way to
allocate map colors to the corresponding values, or vice versa.

So, I hope that the next QGIS version will include an option which
allows selecting the method how to  display the data, as continuum
or categorized.


Regards

Martin


Am 3/9/2021 um 4:18 PM schrieb Sebastian Gutwein:

Martin,
I think this may be the result of the new feature

https://qgis.org/en/site/forusers/visualchangelog318/#feature-gradient-ramp-based-legends


Which is exciting for me becasue that is how I would like to have
my continious data display. But it sounds like that is not what
you are interested in. I have not tried 3.18 myself so don't know
if there is a workaround.
It does look like there are some links to discussions in the
comments of this stack exchange question.

gis.stackexchange.com/questions/388843/qgis-3-18-override-raster-gradient-legends



gis.stackexchange.com/questions/388154/how-to-get-back-discrete-raster-legend-symbols-in-qgis-3-16


twitter.com/ThomasG77/status/1365255399927140355



On Tue, Mar 9, 2021 at 7:54 AM Bernd Vogelgesang
mailto:bernd.vogelges...@gmx.de>> wrote:

Without testing I would say it's a bug. Quite some bugs went
into 3.18
unnoticed and unfortunately, it's not  communicated on the
landing page.
Next regular point release will be in 10 days, but for urgent
stuff, you
should better use 3.16.


On 09.03.21 13:32, Martin Bittens wrot:
> Hello QGIS User List, i
>
> I already sent this message but it was not posted, so it is
here again.
> Hopefully it works now.
>
>
> I am still struggling with the problem creating a legend
for a raster
> layer. Usually I am working with the following settings in
order to
> colorize a calculated raster layer (e.g. after applying
v.surf.idw on a
> point data set):
>
> - rendering type: singleband pseudocolor
>
> - interpolation: linear
 

Re: [Qgis-user] Raster Layer Symbology Problem

[Alessandro Pasotti]

See https://github.com/qgis/QGIS/pull/42193 for a possible solution.

Kind regards


On Wed, Mar 10, 2021 at 9:54 PM Sebastian Gutwein  wrote:

> Martin,
> I agree with your assessment.
> I assume the assumption of the designers (thank you Nyall Dawson et al for
> all of your amazing work) was that if you were displaying a
> continuous raster you would want a continuous legend as well.
> As shown by your issue and in the links I shared with you the reality is
> that this doesn't fit all use cases.
> I am considering writing up a feature request to address those issues.
> Unless you want to?
> To help me understand your use case more would a legend that was
> continuous but had numerical values at each "break" work for you? An
> example of this is in this tutorial
> https://www.ecodiv.earth/post/legend-for-continuous-raster-in-qgis-composer/
> [image: image.png]
>
> -Bas
>
> On Wed, Mar 10, 2021 at 2:34 PM Martin Bittens 
> wrote:
>
>> Sebastian, Bernd,
>>
>> thanks a lot for your response. I checked the links Sebastian sent. As
>> far as I could see displaying data in the legend as a continuum is a new
>> feature in QGIS 3.18 which replaced the previous method displaying data in
>> the legend as categories (as QGIS 3.16.4 is still doing - fortunately.
>> Otherwise it would be difficult producing maps in ongoing projects in a
>> consistent layout). And obviously there is no option available switching
>> between the old and the new display method. Personally I think it was not a
>> good decision giving up completely the categorical display in the legend.
>> In particular if you would work with multiple colors and a large range of
>> values, there is no way to allocate map colors to the corresponding values,
>> or vice versa.
>>
>> So, I hope that the next QGIS version will include an option which allows
>> selecting the method how to  display the data, as continuum or categorized.
>>
>>
>> Regards
>>
>> Martin
>>
>>
>> Am 3/9/2021 um 4:18 PM schrieb Sebastian Gutwein:
>>
>> Martin,
>> I think this may be the result of the new feature
>> https://qgis.org/en/site/forusers/visualchangelog318/#feature-gradient-ramp-based-legends
>> Which is exciting for me becasue that is how I would like to have my
>> continious data display. But it sounds like that is not what you are
>> interested in. I have not tried 3.18 myself so don't know if there is a
>> workaround.
>> It does look like there are some links to discussions in the comments of
>> this stack exchange question.
>> gis.stackexchange.com/questions/388843/qgis-3-18-override-raster-gradient-legends
>>
>> gis.stackexchange.com/questions/388154/how-to-get-back-discrete-raster-legend-symbols-in-qgis-3-16
>> twitter.com/ThomasG77/status/1365255399927140355
>>
>>
>> On Tue, Mar 9, 2021 at 7:54 AM Bernd Vogelgesang <
>> bernd.vogelges...@gmx.de> wrote:
>>
>>> Without testing I would say it's a bug. Quite some bugs went into 3.18
>>> unnoticed and unfortunately, it's not  communicated on the landing page.
>>> Next regular point release will be in 10 days, but for urgent stuff, you
>>> should better use 3.16.
>>>
>>>
>>> On 09.03.21 13:32, Martin Bittens wrot:
>>> > Hello QGIS User List, i
>>> >
>>> > I already sent this message but it was not posted, so it is here again.
>>> > Hopefully it works now.
>>> >
>>> >
>>> > I am still struggling with the problem creating a legend for a raster
>>> > layer. Usually I am working with the following settings in order to
>>> > colorize a calculated raster layer (e.g. after applying v.surf.idw on a
>>> > point data set):
>>> >
>>> > - rendering type: singleband pseudocolor
>>> >
>>> > - interpolation: linear
>>> >
>>> > - mode: equal interval
>>> >
>>> >
>>> > In QGIS 3.18.0:
>>> >
>>> > Selecting an appropriate color ramp and applying a classification in,
>>> > e.g., 5 classes, I see in the "Layer Properties - Symbology" window the
>>> > 5 colored classes separately and the corresponding 5 values (in my case
>>> > temperatures) for each color coding. But in the "Layer Panel" the
>>> legend
>>> > shows the color coding as a continuum and only the first and last value
>>> > of the value range appears. The same thing happens in the layout
>>> manager
>>> > when I create a layout for printing which includes a legend.
>>> >
>>> > In QGIS 3.16.4 LTR and previous versions:
>>> >
>>> > Doing the same I get the 5 color classes separately and the
>>> > corresponding values for each of the 5 classes in the "Legend Panel"as
>>> > well as in the layout manger.
>>> >
>>> >
>>> > My question: Is this a bug in the new QGIS version or does QGIS 3.18
>>> not
>>> > provide this functionality anymore?
>>> >
>>> >
>>> > Thanks a lot for a comment.
>>> >
>>> >
>>> > Regards
>>> >
>>> >
>>> > Martin
>>> >
>>> >
>>> >
>>> > --
>>> > This email has been checked for viruses by Avast antivirus software.
>>> > https://www.avast.com/antivirus
>>> >
>>> > ___
>>> > Qgis-user mailing list
>>> > Qgis-user@lists.osgeo.o

Re: [Qgis-user] Raster Layer Symbology Problem

[Sebastian Gutwein]

Martin,
I agree with your assessment.
I assume the assumption of the designers (thank you Nyall Dawson et al for
all of your amazing work) was that if you were displaying a
continuous raster you would want a continuous legend as well.
As shown by your issue and in the links I shared with you the reality is
that this doesn't fit all use cases.
I am considering writing up a feature request to address those issues.
Unless you want to?
To help me understand your use case more would a legend that was
continuous but had numerical values at each "break" work for you? An
example of this is in this tutorial
https://www.ecodiv.earth/post/legend-for-continuous-raster-in-qgis-composer/
[image: image.png]

-Bas

On Wed, Mar 10, 2021 at 2:34 PM Martin Bittens 
wrote:

> Sebastian, Bernd,
>
> thanks a lot for your response. I checked the links Sebastian sent. As far
> as I could see displaying data in the legend as a continuum is a new
> feature in QGIS 3.18 which replaced the previous method displaying data in
> the legend as categories (as QGIS 3.16.4 is still doing - fortunately.
> Otherwise it would be difficult producing maps in ongoing projects in a
> consistent layout). And obviously there is no option available switching
> between the old and the new display method. Personally I think it was not a
> good decision giving up completely the categorical display in the legend.
> In particular if you would work with multiple colors and a large range of
> values, there is no way to allocate map colors to the corresponding values,
> or vice versa.
>
> So, I hope that the next QGIS version will include an option which allows
> selecting the method how to  display the data, as continuum or categorized.
>
>
> Regards
>
> Martin
>
>
> Am 3/9/2021 um 4:18 PM schrieb Sebastian Gutwein:
>
> Martin,
> I think this may be the result of the new feature
> https://qgis.org/en/site/forusers/visualchangelog318/#feature-gradient-ramp-based-legends
> Which is exciting for me becasue that is how I would like to have my
> continious data display. But it sounds like that is not what you are
> interested in. I have not tried 3.18 myself so don't know if there is a
> workaround.
> It does look like there are some links to discussions in the comments of
> this stack exchange question.
> gis.stackexchange.com/questions/388843/qgis-3-18-override-raster-gradient-legends
>
> gis.stackexchange.com/questions/388154/how-to-get-back-discrete-raster-legend-symbols-in-qgis-3-16
> twitter.com/ThomasG77/status/1365255399927140355
>
>
> On Tue, Mar 9, 2021 at 7:54 AM Bernd Vogelgesang 
> wrote:
>
>> Without testing I would say it's a bug. Quite some bugs went into 3.18
>> unnoticed and unfortunately, it's not  communicated on the landing page.
>> Next regular point release will be in 10 days, but for urgent stuff, you
>> should better use 3.16.
>>
>>
>> On 09.03.21 13:32, Martin Bittens wrot:
>> > Hello QGIS User List, i
>> >
>> > I already sent this message but it was not posted, so it is here again.
>> > Hopefully it works now.
>> >
>> >
>> > I am still struggling with the problem creating a legend for a raster
>> > layer. Usually I am working with the following settings in order to
>> > colorize a calculated raster layer (e.g. after applying v.surf.idw on a
>> > point data set):
>> >
>> > - rendering type: singleband pseudocolor
>> >
>> > - interpolation: linear
>> >
>> > - mode: equal interval
>> >
>> >
>> > In QGIS 3.18.0:
>> >
>> > Selecting an appropriate color ramp and applying a classification in,
>> > e.g., 5 classes, I see in the "Layer Properties - Symbology" window the
>> > 5 colored classes separately and the corresponding 5 values (in my case
>> > temperatures) for each color coding. But in the "Layer Panel" the legend
>> > shows the color coding as a continuum and only the first and last value
>> > of the value range appears. The same thing happens in the layout manager
>> > when I create a layout for printing which includes a legend.
>> >
>> > In QGIS 3.16.4 LTR and previous versions:
>> >
>> > Doing the same I get the 5 color classes separately and the
>> > corresponding values for each of the 5 classes in the "Legend Panel"as
>> > well as in the layout manger.
>> >
>> >
>> > My question: Is this a bug in the new QGIS version or does QGIS 3.18 not
>> > provide this functionality anymore?
>> >
>> >
>> > Thanks a lot for a comment.
>> >
>> >
>> > Regards
>> >
>> >
>> > Martin
>> >
>> >
>> >
>> > --
>> > This email has been checked for viruses by Avast antivirus software.
>> > https://www.avast.com/antivirus
>> >
>> > ___
>> > Qgis-user mailing list
>> > Qgis-user@lists.osgeo.org
>> > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
>> > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>> ___
>> Qgis-user mailing list
>> Qgis-user@lists.osgeo.org
>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
>> Unsubscribe: 

Re: [Qgis-user] Raster Layer Symbology Problem

[Martin Bittens]

Sebastian, Bernd,

thanks a lot for your response. I checked the links Sebastian sent. As
far as I could see displaying data in the legend as a continuum is a new
feature in QGIS 3.18 which replaced the previous method displaying data
in the legend as categories (as QGIS 3.16.4 is still doing -
fortunately. Otherwise it would be difficult producing maps in ongoing
projects in a consistent layout). And obviously there is no option
available switching between the old and the new display method.
Personally I think it was not a good decision giving up completely the
categorical display in the legend. In particular if you would work with
multiple colors and a large range of values, there is no way to allocate
map colors to the corresponding values, or vice versa.

So, I hope that the next QGIS version will include an option which
allows selecting the method how to  display the data, as continuum or
categorized.


Regards

Martin


Am 3/9/2021 um 4:18 PM schrieb Sebastian Gutwein:

Martin,
I think this may be the result of the new feature
https://qgis.org/en/site/forusers/visualchangelog318/#feature-gradient-ramp-based-legends

Which is exciting for me becasue that is how I would like to have my
continious data display. But it sounds like that is not what you are
interested in. I have not tried 3.18 myself so don't know if there is
a workaround.
It does look like there are some links to discussions in the comments
of this stack exchange question.
gis.stackexchange.com/questions/388843/qgis-3-18-override-raster-gradient-legends

gis.stackexchange.com/questions/388154/how-to-get-back-discrete-raster-legend-symbols-in-qgis-3-16

twitter.com/ThomasG77/status/1365255399927140355



On Tue, Mar 9, 2021 at 7:54 AM Bernd Vogelgesang
mailto:bernd.vogelges...@gmx.de>> wrote:

Without testing I would say it's a bug. Quite some bugs went into 3.18
unnoticed and unfortunately, it's not  communicated on the landing
page.
Next regular point release will be in 10 days, but for urgent
stuff, you
should better use 3.16.


On 09.03.21 13:32, Martin Bittens wrot:
> Hello QGIS User List, i
>
> I already sent this message but it was not posted, so it is here
again.
> Hopefully it works now.
>
>
> I am still struggling with the problem creating a legend for a
raster
> layer. Usually I am working with the following settings in order to
> colorize a calculated raster layer (e.g. after applying
v.surf.idw on a
> point data set):
>
> - rendering type: singleband pseudocolor
>
> - interpolation: linear
>
> - mode: equal interval
>
>
> In QGIS 3.18.0:
>
> Selecting an appropriate color ramp and applying a
classification in,
> e.g., 5 classes, I see in the "Layer Properties - Symbology"
window the
> 5 colored classes separately and the corresponding 5 values (in
my case
> temperatures) for each color coding. But in the "Layer Panel"
the legend
> shows the color coding as a continuum and only the first and
last value
> of the value range appears. The same thing happens in the layout
manager
> when I create a layout for printing which includes a legend.
>
> In QGIS 3.16.4 LTR and previous versions:
>
> Doing the same I get the 5 color classes separately and the
> corresponding values for each of the 5 classes in the "Legend
Panel"as
> well as in the layout manger.
>
>
> My question: Is this a bug in the new QGIS version or does QGIS
3.18 not
> provide this functionality anymore?
>
>
> Thanks a lot for a comment.
>
>
> Regards
>
>
> Martin
>
>
>
> --
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus 
>
> ___
> Qgis-user mailing list
> Qgis-user@lists.osgeo.org 
> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user

> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user

___
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List info: https://lists.osgeo.org/mailman/listinfo/qgis-user

Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user

Re: [Qgis-user] Raster Layer Symbology Problem

[Sebastian Gutwein]

Martin,
I think this may be the result of the new feature
https://qgis.org/en/site/forusers/visualchangelog318/#feature-gradient-ramp-based-legends
Which is exciting for me becasue that is how I would like to have my
continious data display. But it sounds like that is not what you are
interested in. I have not tried 3.18 myself so don't know if there is a
workaround.
It does look like there are some links to discussions in the comments of
this stack exchange question.
gis.stackexchange.com/questions/388843/qgis-3-18-override-raster-gradient-legends
gis.stackexchange.com/questions/388154/how-to-get-back-discrete-raster-legend-symbols-in-qgis-3-16
twitter.com/ThomasG77/status/1365255399927140355


On Tue, Mar 9, 2021 at 7:54 AM Bernd Vogelgesang 
wrote:

> Without testing I would say it's a bug. Quite some bugs went into 3.18
> unnoticed and unfortunately, it's not  communicated on the landing page.
> Next regular point release will be in 10 days, but for urgent stuff, you
> should better use 3.16.
>
>
> On 09.03.21 13:32, Martin Bittens wrot:
> > Hello QGIS User List, i
> >
> > I already sent this message but it was not posted, so it is here again.
> > Hopefully it works now.
> >
> >
> > I am still struggling with the problem creating a legend for a raster
> > layer. Usually I am working with the following settings in order to
> > colorize a calculated raster layer (e.g. after applying v.surf.idw on a
> > point data set):
> >
> > - rendering type: singleband pseudocolor
> >
> > - interpolation: linear
> >
> > - mode: equal interval
> >
> >
> > In QGIS 3.18.0:
> >
> > Selecting an appropriate color ramp and applying a classification in,
> > e.g., 5 classes, I see in the "Layer Properties - Symbology" window the
> > 5 colored classes separately and the corresponding 5 values (in my case
> > temperatures) for each color coding. But in the "Layer Panel" the legend
> > shows the color coding as a continuum and only the first and last value
> > of the value range appears. The same thing happens in the layout manager
> > when I create a layout for printing which includes a legend.
> >
> > In QGIS 3.16.4 LTR and previous versions:
> >
> > Doing the same I get the 5 color classes separately and the
> > corresponding values for each of the 5 classes in the "Legend Panel"as
> > well as in the layout manger.
> >
> >
> > My question: Is this a bug in the new QGIS version or does QGIS 3.18 not
> > provide this functionality anymore?
> >
> >
> > Thanks a lot for a comment.
> >
> >
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Re: [Qgis-user] Raster Layer Symbology Problem

[Bernd Vogelgesang]

Without testing I would say it's a bug. Quite some bugs went into 3.18
unnoticed and unfortunately, it's not  communicated on the landing page.
Next regular point release will be in 10 days, but for urgent stuff, you
should better use 3.16.


On 09.03.21 13:32, Martin Bittens wrot:

Hello QGIS User List, i

I already sent this message but it was not posted, so it is here again.
Hopefully it works now.


I am still struggling with the problem creating a legend for a raster
layer. Usually I am working with the following settings in order to
colorize a calculated raster layer (e.g. after applying v.surf.idw on a
point data set):

- rendering type: singleband pseudocolor

- interpolation: linear

- mode: equal interval


In QGIS 3.18.0:

Selecting an appropriate color ramp and applying a classification in,
e.g., 5 classes, I see in the "Layer Properties - Symbology" window the
5 colored classes separately and the corresponding 5 values (in my case
temperatures) for each color coding. But in the "Layer Panel" the legend
shows the color coding as a continuum and only the first and last value
of the value range appears. The same thing happens in the layout manager
when I create a layout for printing which includes a legend.

In QGIS 3.16.4 LTR and previous versions:

Doing the same I get the 5 color classes separately and the
corresponding values for each of the 5 classes in the "Legend Panel"as
well as in the layout manger.


My question: Is this a bug in the new QGIS version or does QGIS 3.18 not
provide this functionality anymore?


Thanks a lot for a comment.


Regards


Martin



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[Qgis-user] Raster Layer Symbology Problem

[Martin Bittens]

Hello QGIS User List,

I already sent this message but it was not posted, so it is here again.
Hopefully it works now.


I am still struggling with the problem creating a legend for a raster
layer. Usually I am working with the following settings in order to
colorize a calculated raster layer (e.g. after applying v.surf.idw on a
point data set):

- rendering type: singleband pseudocolor

- interpolation: linear

- mode: equal interval


In QGIS 3.18.0:

Selecting an appropriate color ramp and applying a classification in,
e.g., 5 classes, I see in the "Layer Properties - Symbology" window the
5 colored classes separately and the corresponding 5 values (in my case
temperatures) for each color coding. But in the "Layer Panel" the legend
shows the color coding as a continuum and only the first and last value
of the value range appears. The same thing happens in the layout manager
when I create a layout for printing which includes a legend.

In QGIS 3.16.4 LTR and previous versions:

Doing the same I get the 5 color classes separately and the
corresponding values for each of the 5 classes in the "Legend Panel"as
well as in the layout manger.


My question: Is this a bug in the new QGIS version or does QGIS 3.18 not
provide this functionality anymore?


Thanks a lot for a comment.


Regards


Martin



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