Re: [Qgis-user] contours and symbology

[Saber Razmjooei]

Hi Kirk,

Indeed, converting to vector and styling it using rule-based styling is an
option. Having contour renderer for raster will avoid extra processing and
data conversion.
With contour rendering of raster, you can also use "Resampling" for
creating smooth contours on the fly.

@Azzura, unfortunately, labelling is not available at the moment for raster
contour renderer. We may add it in future releases. For labeling vector
contours, I recommend using this nice trick:
https://twitter.com/totofiandaca/status/1222982773532712960
https://pigrecoinfinito.com/2020/01/31/qgis-come-allineare-le-etichette-delle-isoipse/

Kind regards
Saber

On Wed, 3 Mar 2021 at 18:28, Kirk Schmidt  wrote:

> Hi Saber:
>
> You can do this directly in symbology. See link below, Use Rule Based
> Symbology and "Elev" % 100= 0 to separate all the contours that are
> multiples of 100.  Set your line symbols and you should be good to go.
>
>
> https://gis.stackexchange.com/questions/259875/styling-contours-at-specific-numbers
>
>
> Kirk Schmidt
> On 3/3/2021 2:15 PM, Saber Razmjooei wrote:
>
> Hi Azzurra,
>
> You can use Raster styling to display it as contours with minor and major
> contours:
>
> https://www.qgis.org/en/site/forusers/visualchangelog314/index.html#feature-raster-layer-contour-renderer
>
> Kind regards
> Saber
>
> On Wed, 3 Mar 2021 at 18:01, Azzurra Lentini 
> wrote:
>
>> Hi to all,
>>
>> I have extracted contours from a dtm raster 20 m resolution file and the
>> result is a vector file of contours with 20 m of interval between the
>> contours.
>>
>> I would like to have two different symbols for these contours: for
>> example black colour and thickness 1 for the contours with interval of 100
>> m (0, 100, 200, 300 etc.) and grey colour and thickness 0.5 for the
>> contours 20, 40, 60, 80, 120, 140 .. etc.).
>>
>> What can I do?
>>
>> Normally I create another contours file only for the contours equidistant
>> 100 m and I put a different symbol for the 2 layers.
>>
>> Do you know other ways without the creation of another file?
>> maybe rule-based symbology?
>>
>>
>> Thank you, Azzurra
>>
>> --
>> Lecturer GIS University "Roma Tre"
>> Consultant Environmental Risk Prevention and Hydrogeology
>> AZZURRA LENTINI
>> ++
>> Italy Mobile Tel.: **(39) 338 24 40 676
>> ++
>> SKYPE azzurrahydro
>> ++
>>
>> *azzurralent...@gmail.com *
>>
>> *azzurra.lent...@uniroma3.it  *
>> ++
>> *Par respect pour l'environnement,*
>>
>> *n'imprimez ce mail qu'en cas d'absolue nécessité*
>>
>>
>>
>>
>>
>> ___
>> 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
>>
>
>
> --
> Saber Razmjooei
> www.lutraconsulting.co.uk
>
>
> ___
> Qgis-user mailing listqgis-u...@lists.osgeo.org
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> --
> Kirk Schmidt, MScF, BScF, RPF
> General Manager
> Nortek Resource Solutions Inc.
> RR # 1
> Thorburn, NS
> B0K 1W0
> Tel (902) 922.3607
> Email: k...@nortekresources.com
> Web: www.nortekresources.com
>
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-- 
Saber Razmjooei
www.lutraconsulting.co.uk
+44 (0)7568 129733
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Re: [Qgis-user] contours and symbology

[Azzurra Lentini]

Hi Sebastian great, it works, thank you.


On Wed, 3 Mar 2021 at 19:19, Sebastian Gutwein  wrote:

> I use rule based styling with this expression for my 100m contour filter
> rule:
> "ELEV" % 100 = 0
> And then another rule that has the Else selected.
> The formula is:
> "ELEV" :The attribute field that contains your label
> % : The remainder from division
> 100 : the divider
> = 0 : the remainder should equal zero.
> This filters all the 100m contours.
>
> On Wed, Mar 3, 2021 at 1:01 PM Azzurra Lentini 
> wrote:
>
>> Hi to all,
>>
>> I have extracted contours from a dtm raster 20 m resolution file and the
>> result is a vector file of contours with 20 m of interval between the
>> contours.
>>
>> I would like to have two different symbols for these contours: for
>> example black colour and thickness 1 for the contours with interval of 100
>> m (0, 100, 200, 300 etc.) and grey colour and thickness 0.5 for the
>> contours 20, 40, 60, 80, 120, 140 .. etc.).
>>
>> What can I do?
>>
>> Normally I create another contours file only for the contours equidistant
>> 100 m and I put a different symbol for the 2 layers.
>>
>> Do you know other ways without the creation of another file?
>> maybe rule-based symbology?
>>
>>
>> Thank you, Azzurra
>>
>> --
>> Lecturer GIS University "Roma Tre"
>> Consultant Environmental Risk Prevention and Hydrogeology
>> AZZURRA LENTINI
>> ++
>> Italy Mobile Tel.: **(39) 338 24 40 676
>> ++
>> SKYPE azzurrahydro
>> ++
>>
>> *azzurralent...@gmail.com *
>>
>> *azzurra.lent...@uniroma3.it  *
>> ++
>> *Par respect pour l'environnement,*
>>
>> *n'imprimez ce mail qu'en cas d'absolue nécessité*
>>
>>
>>
>>
>>
>> ___
>> 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
>>
>

-- 
Lecturer GIS University "Roma Tre"
Consultant Environmental Risk Prevention and Hydrogeology
AZZURRA LENTINI
++
Italy Mobile Tel.: **(39) 338 24 40 676
++
SKYPE azzurrahydro
++

*azzurralent...@gmail.com *

*azzurra.lent...@uniroma3.it  *
++
*Par respect pour l'environnement,*

*n'imprimez ce mail qu'en cas d'absolue nécessité*
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Re: [Qgis-user] contours and symbology

[Sebastian Gutwein]

Bernd,
Thanks for the hint.
The % operator description in QGIS only says: Remainder of division
This has thrown me off in the past because I have tried to search for the
Modulo in the expressions dialog and nothing came up.
I should probably request a change to add the modulo term at the QGIS git
hub.


On Wed, Mar 3, 2021 at 1:45 PM Bernd Vogelgesang 
wrote:

> In case someone wants to google for the " % " later: it's called modulo
> operator (damn, took me half an hour to remember that)
>
>
> On 03.03.21 19:20, Sebastian Gutwein wrote:
>
> Sorry typo: "ELEV" :The attribute field that contains your elevation
>
> On Wed, Mar 3, 2021 at 1:19 PM Sebastian Gutwein  
>  wrote:
>
>
> I use rule based styling with this expression for my 100m contour filter
> rule:
> "ELEV" % 100 = 0
> And then another rule that has the Else selected.
> The formula is:
> "ELEV" :The attribute field that contains your label
> % : The remainder from division
> 100 : the divider
> = 0 : the remainder should equal zero.
> This filters all the 100m contours.
>
> On Wed, Mar 3, 2021 at 1:01 PM Azzurra Lentini  
> 
> wrote:
>
>
> Hi to all,
>
> I have extracted contours from a dtm raster 20 m resolution file and the
> result is a vector file of contours with 20 m of interval between the
> contours.
>
> I would like to have two different symbols for these contours: for
> example black colour and thickness 1 for the contours with interval of 100
> m (0, 100, 200, 300 etc.) and grey colour and thickness 0.5 for the
> contours 20, 40, 60, 80, 120, 140 .. etc.).
>
> What can I do?
>
> Normally I create another contours file only for the contours equidistant
> 100 m and I put a different symbol for the 2 layers.
>
> Do you know other ways without the creation of another file?
> maybe rule-based symbology?
>
>
> Thank you, Azzurra
>
> --
> Lecturer GIS University "Roma Tre"
> Consultant Environmental Risk Prevention and Hydrogeology
> AZZURRA LENTINI
> ++
> Italy Mobile Tel.: **(39) 338 24 40 676
> ++
> SKYPE azzurrahydro
> ++
>
> *azzurralent...@gmail.com  
> *
>
> *azzurra.lent...@uniroma3.it  
>  *
> ++
> *Par respect pour l'environnement,*
>
> *n'imprimez ce mail qu'en cas d'absolue nécessité*
>
>
>
>
>
> ___
> Qgis-user mailing listqgis-u...@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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Re: [Qgis-user] contours and symbology

[Azzurra Lentini]

Dear Saber,
thanks a lot.
I imagine in this case it is not possible to insert the labels of elevation.
Thanks a lot, Azzurra


On Wed, 3 Mar 2021 at 19:15, Saber Razmjooei <
saber.razmjo...@lutraconsulting.co.uk> wrote:

> Hi Azzurra,
>
> You can use Raster styling to display it as contours with minor and major
> contours:
>
> https://www.qgis.org/en/site/forusers/visualchangelog314/index.html#feature-raster-layer-contour-renderer
>
> Kind regards
> Saber
>
> On Wed, 3 Mar 2021 at 18:01, Azzurra Lentini 
> wrote:
>
>> Hi to all,
>>
>> I have extracted contours from a dtm raster 20 m resolution file and the
>> result is a vector file of contours with 20 m of interval between the
>> contours.
>>
>> I would like to have two different symbols for these contours: for
>> example black colour and thickness 1 for the contours with interval of 100
>> m (0, 100, 200, 300 etc.) and grey colour and thickness 0.5 for the
>> contours 20, 40, 60, 80, 120, 140 .. etc.).
>>
>> What can I do?
>>
>> Normally I create another contours file only for the contours equidistant
>> 100 m and I put a different symbol for the 2 layers.
>>
>> Do you know other ways without the creation of another file?
>> maybe rule-based symbology?
>>
>>
>> Thank you, Azzurra
>>
>> --
>> Lecturer GIS University "Roma Tre"
>> Consultant Environmental Risk Prevention and Hydrogeology
>> AZZURRA LENTINI
>> ++
>> Italy Mobile Tel.: **(39) 338 24 40 676
>> ++
>> SKYPE azzurrahydro
>> ++
>>
>> *azzurralent...@gmail.com *
>>
>> *azzurra.lent...@uniroma3.it  *
>> ++
>> *Par respect pour l'environnement,*
>>
>> *n'imprimez ce mail qu'en cas d'absolue nécessité*
>>
>>
>>
>>
>>
>> ___
>> 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
>>
>
>
> --
> Saber Razmjooei
> www.lutraconsulting.co.uk
>
>

-- 
Lecturer GIS University "Roma Tre"
Consultant Environmental Risk Prevention and Hydrogeology
AZZURRA LENTINI
++
Italy Mobile Tel.: **(39) 338 24 40 676
++
SKYPE azzurrahydro
++

*azzurralent...@gmail.com *

*azzurra.lent...@uniroma3.it  *
++
*Par respect pour l'environnement,*

*n'imprimez ce mail qu'en cas d'absolue nécessité*
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Re: [Qgis-user] contours and symbology

[Bernd Vogelgesang]

In case someone wants to google for the " % " later: it's called modulo
operator (damn, took me half an hour to remember that)


On 03.03.21 19:20, Sebastian Gutwein wrote:

Sorry typo: "ELEV" :The attribute field that contains your elevation

On Wed, Mar 3, 2021 at 1:19 PM Sebastian Gutwein  wrote:


I use rule based styling with this expression for my 100m contour filter
rule:
"ELEV" % 100 = 0
And then another rule that has the Else selected.
The formula is:
"ELEV" :The attribute field that contains your label
% : The remainder from division
100 : the divider
= 0 : the remainder should equal zero.
This filters all the 100m contours.

On Wed, Mar 3, 2021 at 1:01 PM Azzurra Lentini 
wrote:


Hi to all,

I have extracted contours from a dtm raster 20 m resolution file and the
result is a vector file of contours with 20 m of interval between the
contours.

I would like to have two different symbols for these contours: for
example black colour and thickness 1 for the contours with interval of 100
m (0, 100, 200, 300 etc.) and grey colour and thickness 0.5 for the
contours 20, 40, 60, 80, 120, 140 .. etc.).

What can I do?

Normally I create another contours file only for the contours equidistant
100 m and I put a different symbol for the 2 layers.

Do you know other ways without the creation of another file?
maybe rule-based symbology?


Thank you, Azzurra

--
Lecturer GIS University "Roma Tre"
Consultant Environmental Risk Prevention and Hydrogeology
AZZURRA LENTINI
++
Italy Mobile Tel.: **(39) 338 24 40 676
++
SKYPE azzurrahydro
++

*azzurralent...@gmail.com *

*azzurra.lent...@uniroma3.it  *
++
*Par respect pour l'environnement,*

*n'imprimez ce mail qu'en cas d'absolue nécessité*





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Re: [Qgis-user] contours and symbology

[Kirk Schmidt]

Hi Saber:

You can do this directly in symbology. See link below, Use Rule Based 
Symbology and "Elev" % 100= 0 to separate all the contours that are 
multiples of 100.  Set your line symbols and you should be good to go.


https://gis.stackexchange.com/questions/259875/styling-contours-at-specific-numbers


Kirk Schmidt

On 3/3/2021 2:15 PM, Saber Razmjooei wrote:

Hi Azzurra,

You can use Raster styling to display it as contours with minor and 
major contours:
https://www.qgis.org/en/site/forusers/visualchangelog314/index.html#feature-raster-layer-contour-renderer 



Kind regards
Saber

On Wed, 3 Mar 2021 at 18:01, Azzurra Lentini > wrote:


Hi to all,

I have extracted contours from a dtm raster 20 m resolution file
and the result is a vector file of contours with 20 m of interval
between the contours.

I would like to have two different symbols for these contours: for
example black colour and thickness 1 for the contours with
interval of 100 m (0, 100, 200, 300 etc.) and grey colour and
thickness 0.5 for the contours 20, 40, 60, 80, 120, 140 .. etc.).

What can I do?

Normally I create another contours file only for the contours
equidistant 100 m and I put a different symbol for the 2 layers.

Do you know other ways without the creation of another file?
maybe rule-based symbology?


Thank you, Azzurra


-- 
Lecturer GIS University "Roma Tre"

Consultant Environmental Risk Prevention and Hydrogeology
AZZURRA LENTINI
++
Italy Mobile Tel.: **(39) 338 24 40 676
++
SKYPE azzurrahydro
++

*_azzurralent...@gmail.com _*

*_azzurra.lent...@uniroma3.it 
_**__*

++
*Par respect pour l'environnement,*

*n'imprimez ce mail qu'en cas d'absolue nécessité*





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--
Saber Razmjooei
www.lutraconsulting.co.uk 


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--
Kirk Schmidt, MScF, BScF, RPF
General Manager
Nortek Resource Solutions Inc.
RR # 1
Thorburn, NS
B0K 1W0
Tel (902) 922.3607
Email: k...@nortekresources.com
Web: www.nortekresources.com

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Re: [Qgis-user] contours and symbology

[Sebastian Gutwein]

Sorry typo: "ELEV" :The attribute field that contains your elevation

On Wed, Mar 3, 2021 at 1:19 PM Sebastian Gutwein  wrote:

> I use rule based styling with this expression for my 100m contour filter
> rule:
> "ELEV" % 100 = 0
> And then another rule that has the Else selected.
> The formula is:
> "ELEV" :The attribute field that contains your label
> % : The remainder from division
> 100 : the divider
> = 0 : the remainder should equal zero.
> This filters all the 100m contours.
>
> On Wed, Mar 3, 2021 at 1:01 PM Azzurra Lentini 
> wrote:
>
>> Hi to all,
>>
>> I have extracted contours from a dtm raster 20 m resolution file and the
>> result is a vector file of contours with 20 m of interval between the
>> contours.
>>
>> I would like to have two different symbols for these contours: for
>> example black colour and thickness 1 for the contours with interval of 100
>> m (0, 100, 200, 300 etc.) and grey colour and thickness 0.5 for the
>> contours 20, 40, 60, 80, 120, 140 .. etc.).
>>
>> What can I do?
>>
>> Normally I create another contours file only for the contours equidistant
>> 100 m and I put a different symbol for the 2 layers.
>>
>> Do you know other ways without the creation of another file?
>> maybe rule-based symbology?
>>
>>
>> Thank you, Azzurra
>>
>> --
>> Lecturer GIS University "Roma Tre"
>> Consultant Environmental Risk Prevention and Hydrogeology
>> AZZURRA LENTINI
>> ++
>> Italy Mobile Tel.: **(39) 338 24 40 676
>> ++
>> SKYPE azzurrahydro
>> ++
>>
>> *azzurralent...@gmail.com *
>>
>> *azzurra.lent...@uniroma3.it  *
>> ++
>> *Par respect pour l'environnement,*
>>
>> *n'imprimez ce mail qu'en cas d'absolue nécessité*
>>
>>
>>
>>
>>
>> ___
>> 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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>
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Re: [Qgis-user] contours and symbology

[Sebastian Gutwein]

I use rule based styling with this expression for my 100m contour filter
rule:
"ELEV" % 100 = 0
And then another rule that has the Else selected.
The formula is:
"ELEV" :The attribute field that contains your label
% : The remainder from division
100 : the divider
= 0 : the remainder should equal zero.
This filters all the 100m contours.

On Wed, Mar 3, 2021 at 1:01 PM Azzurra Lentini 
wrote:

> Hi to all,
>
> I have extracted contours from a dtm raster 20 m resolution file and the
> result is a vector file of contours with 20 m of interval between the
> contours.
>
> I would like to have two different symbols for these contours: for example
> black colour and thickness 1 for the contours with interval of 100 m (0,
> 100, 200, 300 etc.) and grey colour and thickness 0.5 for the contours 20,
> 40, 60, 80, 120, 140 .. etc.).
>
> What can I do?
>
> Normally I create another contours file only for the contours equidistant
> 100 m and I put a different symbol for the 2 layers.
>
> Do you know other ways without the creation of another file?
> maybe rule-based symbology?
>
>
> Thank you, Azzurra
>
> --
> Lecturer GIS University "Roma Tre"
> Consultant Environmental Risk Prevention and Hydrogeology
> AZZURRA LENTINI
> ++
> Italy Mobile Tel.: **(39) 338 24 40 676
> ++
> SKYPE azzurrahydro
> ++
>
> *azzurralent...@gmail.com *
>
> *azzurra.lent...@uniroma3.it  *
> ++
> *Par respect pour l'environnement,*
>
> *n'imprimez ce mail qu'en cas d'absolue nécessité*
>
>
>
>
>
> ___
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> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
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Re: [Qgis-user] contours and symbology

[Saber Razmjooei]

Hi Azzurra,

You can use Raster styling to display it as contours with minor and major
contours:
https://www.qgis.org/en/site/forusers/visualchangelog314/index.html#feature-raster-layer-contour-renderer

Kind regards
Saber

On Wed, 3 Mar 2021 at 18:01, Azzurra Lentini 
wrote:

> Hi to all,
>
> I have extracted contours from a dtm raster 20 m resolution file and the
> result is a vector file of contours with 20 m of interval between the
> contours.
>
> I would like to have two different symbols for these contours: for example
> black colour and thickness 1 for the contours with interval of 100 m (0,
> 100, 200, 300 etc.) and grey colour and thickness 0.5 for the contours 20,
> 40, 60, 80, 120, 140 .. etc.).
>
> What can I do?
>
> Normally I create another contours file only for the contours equidistant
> 100 m and I put a different symbol for the 2 layers.
>
> Do you know other ways without the creation of another file?
> maybe rule-based symbology?
>
>
> Thank you, Azzurra
>
> --
> Lecturer GIS University "Roma Tre"
> Consultant Environmental Risk Prevention and Hydrogeology
> AZZURRA LENTINI
> ++
> Italy Mobile Tel.: **(39) 338 24 40 676
> ++
> SKYPE azzurrahydro
> ++
>
> *azzurralent...@gmail.com *
>
> *azzurra.lent...@uniroma3.it  *
> ++
> *Par respect pour l'environnement,*
>
> *n'imprimez ce mail qu'en cas d'absolue nécessité*
>
>
>
>
>
> ___
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> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
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-- 
Saber Razmjooei
www.lutraconsulting.co.uk
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[Qgis-user] contours and symbology

[Azzurra Lentini]

Hi to all,

I have extracted contours from a dtm raster 20 m resolution file and the
result is a vector file of contours with 20 m of interval between the
contours.

I would like to have two different symbols for these contours: for example
black colour and thickness 1 for the contours with interval of 100 m (0,
100, 200, 300 etc.) and grey colour and thickness 0.5 for the contours 20,
40, 60, 80, 120, 140 .. etc.).

What can I do?

Normally I create another contours file only for the contours equidistant
100 m and I put a different symbol for the 2 layers.

Do you know other ways without the creation of another file?
maybe rule-based symbology?


Thank you, Azzurra

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Re: [Qgis-user] Contours generation problem.

[Nyall Dawson]

On 28 May 2018 at 06:32, Xero  wrote:
> Hello I have a problem when trying to generate a contour on a raster. Every
> time I start the processus I've got this error message :
> /Traitement de l'algorithme ...
> AlgorithmDialog
> Input parameters:
> { 'BAND' : 1, 'CREATE_3D' : False, 'FIELD_NAME' : 'ELEV', 'IGNORE_NODATA' :
> False, 'INPUT' : '/Users/arnomak/Desktop/RDB DEM/Agisoft/DEM.tif',
> 'INTERVAL' : 10, 'NODATA' : 0, 'OFFSET' : 0, 'OUTPUT' :
> '/var/folders/22/h094_46j6fs1y_hp6gf81r80gn/T/processing_5ac940d3667d4295b56d8931c0ec3a61/813de11bbc234ad792da768934852d05/OUTPUT.shp'
> }
>
> GDAL command:
> gdal_contour -b 1 -a ELEV -i 10.0 -snodata 0.0 -f "ESRI Shapefile"
> "/Users/arnomak/Desktop/RDB DEM/Agisoft/DEM.tif"
> "/var/folders/22/h094_46j6fs1y_hp6gf81r80gn/T/processing_5ac940d3667d4295b56d8931c0ec3a61/813de11bbc234ad792da768934852d05/OUTPUT.shp"
> GDAL command output:
> /bin/sh: gdal_contour: command not found

Here's the error ^^. QGIS can't run gdal_contour, so it's likely not
available on your workstation. Try running gdal_contour from a
terminal window and see if it works there. If not, I suspect you'r
missing a required gdal package.

Nyall
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[Qgis-user] Contours generation problem.

[Xero]

Hello I have a problem when trying to generate a contour on a raster. Every
time I start the processus I've got this error message :
/Traitement de l'algorithme ...
AlgorithmDialog
Input parameters:
{ 'BAND' : 1, 'CREATE_3D' : False, 'FIELD_NAME' : 'ELEV', 'IGNORE_NODATA' :
False, 'INPUT' : '/Users/arnomak/Desktop/RDB DEM/Agisoft/DEM.tif',
'INTERVAL' : 10, 'NODATA' : 0, 'OFFSET' : 0, 'OUTPUT' :
'/var/folders/22/h094_46j6fs1y_hp6gf81r80gn/T/processing_5ac940d3667d4295b56d8931c0ec3a61/813de11bbc234ad792da768934852d05/OUTPUT.shp'
}

GDAL command:
gdal_contour -b 1 -a ELEV -i 10.0 -snodata 0.0 -f "ESRI Shapefile"
"/Users/arnomak/Desktop/RDB DEM/Agisoft/DEM.tif"
"/var/folders/22/h094_46j6fs1y_hp6gf81r80gn/T/processing_5ac940d3667d4295b56d8931c0ec3a61/813de11bbc234ad792da768934852d05/OUTPUT.shp"
GDAL command output:
/bin/sh: gdal_contour: command not found

Execution completed in 0.07 seconds
Results:
{'OUTPUT': }

Chargement des couches de résultat
Les couches suivantes n'ont pas été générées correctement *(translation :
following layers haven't been correctly generated)*
/var/folders/22/h094_46j6fs1y_hp6gf81r80gn/T/processing_5ac940d3667d4295b56d8931c0ec3a61/813de11bbc234ad792da768934852d05/OUTPUT.shp
Vous pouvez vérifier le Panel de messages du journal dans la fenêtre
principale de QGIS pour trouver plus d'informations à propos de l'exécution
de l'algorithme./
Anyone have a clue how to get contours??
Thanks



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Re: [Qgis-user] Contours to DEM surface

[Nicolas Cadieux]

Hi,

Keep in mind Lester that the result will always look like a rice paddy 
field with steps unless you resort to lots of smoothing.  You will see 
theses steps with you do a shade model from the DEM. That's a good way 
to see the problem.  It may no be visible by just looking at the DEM.

Nicolas


Le 2016-07-12 12:17, Anita Graser [via OSGeo.org] a écrit :
> Hi Lester
>
> On Tue, Jul 12, 2016 at 5:48 PM, Lester Anderson <[hidden email] 
> > wrote:
>
> A quick one, but is there an easy route/workflow to convert a
> shapefile of elevation contours to a grid surface?
>
>
> ​Please have a look at the solutions suggested in 
> http://gis.stackexchange.com/questions/18116/creating-dem-from-contours-in-qgis
>
> Best wishes,
> Anita​
>
>
>
>
>
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Re: [Qgis-user] Contours to DEM surface

[Martin Schneppmüller]

Hi Lester,

I would try to make "points from lines" (I thinks its under 'vector' -
'geometry tools' ) and then create a raster wiht the interpolation plugin (
http://docs.qgis.org/2.8/en/docs/user_manual/plugins/plugins_interpolation.html).
Maybe you can try the interpolation plugin with the lines.

The lines must have the attribute "elevation" or somthing else hope this
helps.





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Re: [Qgis-user] Contours to DEM surface

[Anita Graser]

Hi Lester

On Tue, Jul 12, 2016 at 5:48 PM, Lester Anderson 
wrote:
>
> A quick one, but is there an easy route/workflow to convert a
> shapefile of elevation contours to a grid surface?
>

​Please have a look at the solutions suggested in
http://gis.stackexchange.com/questions/18116/creating-dem-from-contours-in-qgis

Best wishes,
Anita​
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[Qgis-user] Contours to DEM surface

[Lester Anderson]

Hello all,

A quick one, but is there an easy route/workflow to convert a
shapefile of elevation contours to a grid surface?

Thanks
Lester

QGIS 2.10, 2.12, 2.14
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Re: [Qgis-user] Contours lines interpolation

[Alexandre Neto]

Hello Alfonso,

you can interpolate your lines to a raster, and then create the 1 m contour
lines from it.

Be aware that this is an interpolation process and the precision of the
resulting lines are naturally equal or even lower than the original ones.

hope it helped.

Alexandre Neto
No dia 21 de Nov de 2013 18:20, Alfonso Flaquer alfonsofla...@gmail.com
escreveu:

 Dear list
 it´is possible to create a shape with contour lines each 1 m from a shape
 with contours lines each 10 m?. I assume theare is a simple way to do this
 in qgis,  just can´t find it.
 Regards,

 Es posible crear un shape con curvas de nivel cada 1 m partiendo de un
 shape con curvas de nivel cada 10 m?. Asumo que hay una forma simple de
 hacerlo, pero no puedo encontrarla.
 Gracias.

 --
 AfLa

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[Qgis-user] Contours lines interpolation

[Alfonso Flaquer]

Dear list
it´is possible to create a shape with contour lines each 1 m from a shape
with contours lines each 10 m?. I assume theare is a simple way to do this
in qgis,  just can´t find it.
Regards,

Es posible crear un shape con curvas de nivel cada 1 m partiendo de un
shape con curvas de nivel cada 10 m?. Asumo que hay una forma simple de
hacerlo, pero no puedo encontrarla.
Gracias.

-- 
AfLa
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[Qgis-user] contours

[john raskulinecz]

Dear List, First, thanks to all who have helped me in the past. I am always 
amazed at the selfless acts by thosewith more knowledge than I have about Qgis 
and their willingness to share that kmowledge. I only hope that some day I can 
contibute in kind. Micha, thanks for the direction to Lionel 
Roubeyrie's contour plugin. I can get the txt. files to contour andcustomize 
the interval values, styles, colors, etc. but when I save the project, and then 
reopen, the new layers show up but do not display.   Any ideas how to save? 
I was wondering if there is a way to convert the new layers to vector format 
then combine with other shp. files.  again, much thanks, J.R.   
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Re: [Qgis-user] contours

[Micha Silver]

  
  
On 11/07/2012 22:17, john raskulinecz wrote:

  
  
Dear List,
 
    First, thanks to all who have helped me in the past. I am
always amazed at the selfless acts by those
with more knowledge than I have about Qgis and their willingness
to share that kmowledge. I only hope 
that some day I can contibute in kind. 
    
    Micha, thanks for the direction to Lionel Roubeyrie's
contour plugin. I can get the txt. files to contour and
customize the interval values, styles, colors, etc. but when I
save the project, and then reopen, the new 
layers show up but do not display. 
 


Did you save the contours to a shapefile after creating the layer?
Right click on the layer name and "Save As..."
Then load that new shapefile into the project and save the project.
Next time everything should show up.


    
   Any ideas how to save? I was wondering if there is a way to
convert the new layers to vector format then 
combine with other shp. files.
 
 again, much thanks,
 J.R.
 
   
 
   
   
  
  
  
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[Qgis-user] contours

[john raskulinecz]

Micha, Believe it or not since I last posted and before I rechecked the 
list I did just that. It works wonderfuly! The file I am contouring contains 
magneric readings and plays well with other layers once the crs's are set. I 
have some gravity data that is in the same txt format however that does not. Do 
you think that if I first convert to ersi shp file it will contour? Any way 
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[Qgis-user] contours

[john raskulinecz]

Hello Micha,Thanks for your interest. I have some magnetic, and gravity data 
files that open as delimited text filesfrom the layer option in qgis 1.7.4. 
They are text documents written in Word, (I think excel spreadsheet 
format).They show as a layer and can be customized by right clicking 
properties. The idendify tool can be used to bring up the attributes for the 
point chosen; lat xxx, lon yyy, has avalue of 100 nana teslas or so many mil 
gals, etc. I would like to be able to draw contour lines connecting certain 
ranges of values. It used to be easy a while ago but I was told via this 
listthat that plugin no longer works. I tried to send one of these files as an 
attachment but the list administator said it was to large. I don't want to 
directly respond to you email as I believe that is a violation of protocal, but 
if you want I can try to zipp it. As to shp files, some vector files are 
similar and it would be great if there was a way to contour geochem data by 
element or mineral concentration and add as a layer. Any thoughts of course 
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[Qgis-user] contours

[john raskulinecz]

Dear Alex,Yes ! This works. Thanks! If you're ever in Reno, Nv., U.S.A. 
give me a call and I'll buy you a a beverage of your chioce!J.R.
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[Qgis-user] contours txt

[john raskulinecz]

Hell David, and thank you for your suggestions.
I will try your idea but fear the manual entry of many data points will make 
this very time consuming. I think I know what I will be doing 
for the next couple of days.
again thanks;
J.R.
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[Qgis-user] contours

[john raskulinecz]

Micha, thanksI downloaded QGISOSGEOW-1.7.4D211BV.16 and its up and running and 
have looked in Pluginsmanage plugins but can not find contours. I have right 
clicked on the layer and looked for contour, then went to properties and could 
not find a way. It seems to me that it wasn't this hard before. I'll try to re 
download and scour the user guide. I also tried the links you sent. One went 
into a nested loop the other came up so I'll be looking at that.Thanks 
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Re: [Qgis-user] contours

[Giovanni Manghi]

use the raster - extraction - contour tool. Be sure to have the gdal
tools plugin active (it is installed by default).

cheers

-- Giovanni --

On Sun, 2012-03-25 at 15:46 -0700, john raskulinecz wrote:
 Micha, thanks
 I downloaded QGISOSGEOW-1.7.4D211BV.16 and its up and running and have
 looked in Pluginsmanage plugins but can not find contours. I have
 right clicked on the layer and looked for contour, then went to
 properties and could not find a way. It seems to me that it wasn't
 this hard before. I'll try to re download and scour the user guide. I
 also tried the links you sent. One went into a nested loop the other
 came up so I'll be looking at that.
 Thanks again,
 J.R.
 
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[Qgis-user] contours

[john raskulinecz]

Hello Giovani,Thanks for your suggestion regarding contouring delim txt files. 
When I click Raster on the main toolbar that has  File Edit View, etc. it 
only shows raster calculator. I tried that but it said it was doing base 
template building. So I guess I'm back to square one. Might there be a quick 
way to convert the dltxt file to a vector file and contour that way?Regards' 
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Re: [Qgis-user] contours

[T. Gray Shaw]

You should see the Raster - Extraction - Contour tool if you have GDAL tools 
turned on in the Plugins menu.

- Gray

On Mar 25, 2012, at 8:10 PM, john raskulinecz wrote:

 Hello Giovani,
 Thanks for your suggestion regarding contouring delim txt files. When I click 
 Raster on the main toolbar that has  File Edit View, etc. it only shows 
 raster calculator. I tried that but it said it was doing base template 
 building.
  So I guess I'm back to square one. Might there be a quick way to convert the 
 dltxt file to a vector file and contour that way?
 Regards' J.R.
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On Mar 25, 2012, at 3:53 PM, Giovanni Manghi wrote:

 use the raster - extraction - contour tool. Be sure to have the gdal
 tools plugin active (it is installed by default).
 
 cheers
 
 -- Giovanni --
 
 On Sun, 2012-03-25 at 15:46 -0700, john raskulinecz wrote:
 Micha, thanks
 I downloaded QGISOSGEOW-1.7.4D211BV.16 and its up and running and have
 looked in Pluginsmanage plugins but can not find contours. I have
 right clicked on the layer and looked for contour, then went to
 properties and could not find a way. It seems to me that it wasn't
 this hard before. I'll try to re download and scour the user guide. I
 also tried the links you sent. One went into a nested loop the other
 came up so I'll be looking at that.
 Thanks again,
 J.R.
 
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Redway and Berkeley, CA
510 418-3420
Skype: tgrayshaw

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Re: [Qgis-user] contours plugin

[Micha Silver]

On 03/05/2010 11:29 AM, deepika acharya wrote:

Hello

Yes i have GDALTools plugin in QGIS 1.2.0 Daphnis but these tools are 
not working or not show any error.


so How can Export Raster data  from .jpg to Geo tiff  format by GDAL 
translate tool in QGIS1.2.0 Daphnis or other versions  ?


First, may I suggest you keep these questions on the mail list. That way 
others can pitch in and help, and the answers are archived for future users.


Second, you probably want to upgrade to QGIS 1.4. Many improvements and 
fewer bugs...


Now to your question: In the GDALTools plugin there's an option (under 
the Raster menu) called Translate. Here you choose the source jpeg file 
and the target filename. For this to work properly you must know if the 
original is projected in some coordinate system.  You can choose in the 
GUI window which source CRS the jpeg is in.

You can do the same from the command line with:
gdal_translate -of GTiff -a_srs Original Coord System original.jpg 
final.tif


HTH



thanks !
-- -- -- -- -- -- -- --
 Regard
Deepika Acharya


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Re: [Qgis-user] contours plugin

[Giovanni Manghi]

Hi,
I updated the plugin to the 0.4 version (is that the new one?) but when
I open it I get (qgis trunk under Ubuntu 9.04)



An error has occured while executing Python code:

Traceback (most recent call last):
  File /home/gio/.qgis//python/plugins/contour/contour.py, line 71, in
run
settings.setValue(/Projections/defaultBehaviour,prjSetting)
TypeError: argument 2 of QSettings.setValue() has an invalid type

Python version:
2.6.2 (release26-maint, Apr 19 2009, 02:11:59) 
[GCC 4.3.3]


cheers

-- Giovanni --



On Tue, 2010-02-23 at 10:32 +0100, Lionel Roubeyrie wrote:
 Hi all,
 with the great work of Chris Crook, now the contours plugin can handle 
 irregular 
 points grids and comes with a documentation. The plugin is uploaded to the 
 official plugin repository (imho not very easy to find the url on the qgis 
 website) but I can't remove the old 0.1 (old account with a forgetted 
 password 
 :/ ). Is someone could remove this entry please?
 Thanks
 

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Re: [Qgis-user] contours plugin

[Micha Silver]

On 24/02/2010 12:49, deepika acharya wrote:
Hello
  
  
How can Export Raster data  from .jpg to Geo tiff  format in QGIS or
other open sources ?
 

gdal_translate would do it. Available in the GDALTools plugin in QGIS.
But is the jpg geo-referenced?

Thanks !
-- -- -- -- -- -- -- -- 
 Regard
Deepika Acharya
  
  
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[Qgis-user] contours plugin

[Lionel Roubeyrie]

Hi all,
with the great work of Chris Crook, now the contours plugin can handle irregular 
points grids and comes with a documentation. The plugin is uploaded to the 
official plugin repository (imho not very easy to find the url on the qgis 
website) but I can't remove the old 0.1 (old account with a forgetted password 
:/ ). Is someone could remove this entry please?

Thanks

--
Lionel Roubeyrie
Chargé d'études
LIMAIR
4 rue Atlantis, Bâtiment OXO
Ester Technopole
87068 LIMOGES Cedex
Tel : +33(0) 555 338 524
Fax : +33(0) 555 331 969



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