Assign a specific color to vector layer based on RGB codes in attribute table
I use QGIS and have a geological map for a large area. I present this after ID codes based on the geology ("Geokartnr" in photo).
I want to use international/nation color codes for each rock type, this way it will be comparable to other peoples work. The international colors is already added to the attribute table as a RGB code ("RGBfargko"). Is there any way I can sort/present the maps by "geokartnr" code and present this by the color codes in the RGB codes in the attribute table? Or do I need to change all colors manually?
qgis attribute-table visualisation vector-layer
edited yesterday
Ian Turton♦
49.9k547115
asked yesterday
CasairoCasairo
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I use QGIS and have a geological map for a large area. I present this after ID codes based on the geology ("Geokartnr" in photo).
I want to use international/nation color codes for each rock type, this way it will be comparable to other peoples work. The international colors is already added to the attribute table as a RGB code ("RGBfargko"). Is there any way I can sort/present the maps by "geokartnr" code and present this by the color codes in the RGB codes in the attribute table? Or do I need to change all colors manually?
qgis attribute-table visualisation vector-layer
edited yesterday
Ian Turton♦
49.9k547115
asked yesterday
CasairoCasairo
162
New contributor
Casairo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Be aware that by using an expression to set the color as stated answer below you wont be able to automatically generate a legend.... (so the problem is you either set the color manually OR create the legend manually....)
– J.R
yesterday
@J.R Good point, I think its kind of bug, because I suppose that it will generate legend if you use Categorized symbology (with rgb field as category). You can manually change a symbol of every each category, but if the data defined values are set for color, the value is just not taken from the expression. Or I am missing something?
– Oto Kaláb
yesterday
add a comment |
I use QGIS and have a geological map for a large area. I present this after ID codes based on the geology ("Geokartnr" in photo).
I want to use international/nation color codes for each rock type, this way it will be comparable to other peoples work. The international colors is already added to the attribute table as a RGB code ("RGBfargko"). Is there any way I can sort/present the maps by "geokartnr" code and present this by the color codes in the RGB codes in the attribute table? Or do I need to change all colors manually?
qgis attribute-table visualisation vector-layer
edited yesterday
Ian Turton♦
49.9k547115
asked yesterday
CasairoCasairo
162
New contributor
Casairo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I use QGIS and have a geological map for a large area. I present this after ID codes based on the geology ("Geokartnr" in photo).
I want to use international/nation color codes for each rock type, this way it will be comparable to other peoples work. The international colors is already added to the attribute table as a RGB code ("RGBfargko"). Is there any way I can sort/present the maps by "geokartnr" code and present this by the color codes in the RGB codes in the attribute table? Or do I need to change all colors manually?
qgis attribute-table visualisation vector-layer
qgis attribute-table visualisation vector-layer
edited yesterday
Ian Turton♦
49.9k547115
asked yesterday
CasairoCasairo
162
New contributor
Casairo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited yesterday
Ian Turton♦
49.9k547115
asked yesterday
CasairoCasairo
162
New contributor
Casairo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited yesterday
Ian Turton♦
49.9k547115
edited yesterday
Ian Turton♦
49.9k547115
edited yesterday
Ian Turton♦
49.9k547115
49.9k547115
asked yesterday
CasairoCasairo
162
New contributor
Casairo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked yesterday
CasairoCasairo
162
asked yesterday
CasairoCasairo
162
162
New contributor
Casairo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Casairo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Casairo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Be aware that by using an expression to set the color as stated answer below you wont be able to automatically generate a legend.... (so the problem is you either set the color manually OR create the legend manually....)
– J.R
yesterday
@J.R Good point, I think its kind of bug, because I suppose that it will generate legend if you use Categorized symbology (with rgb field as category). You can manually change a symbol of every each category, but if the data defined values are set for color, the value is just not taken from the expression. Or I am missing something?
– Oto Kaláb
yesterday
add a comment |
Be aware that by using an expression to set the color as stated answer below you wont be able to automatically generate a legend.... (so the problem is you either set the color manually OR create the legend manually....)
– J.R
yesterday
@J.R Good point, I think its kind of bug, because I suppose that it will generate legend if you use Categorized symbology (with rgb field as category). You can manually change a symbol of every each category, but if the data defined values are set for color, the value is just not taken from the expression. Or I am missing something?
– Oto Kaláb
yesterday
Be aware that by using an expression to set the color as stated answer below you wont be able to automatically generate a legend.... (so the problem is you either set the color manually OR create the legend manually....)
– J.R
yesterday
Be aware that by using an expression to set the color as stated answer below you wont be able to automatically generate a legend.... (so the problem is you either set the color manually OR create the legend manually....)
– J.R
yesterday
@J.R Good point, I think its kind of bug, because I suppose that it will generate legend if you use Categorized symbology (with rgb field as category). You can manually change a symbol of every each category, but if the data defined values are set for color, the value is just not taken from the expression. Or I am missing something?
– Oto Kaláb
yesterday
@J.R Good point, I think its kind of bug, because I suppose that it will generate legend if you use Categorized symbology (with rgb field as category). You can manually change a symbol of every each category, but if the data defined values are set for color, the value is just not taken from the expression. Or I am missing something?
– Oto Kaláb
yesterday
add a comment |
3 Answers
3
active
oldest
votes
In the layer styles panel if you click on simple marker, there is a small box to the right of the fill color combo box - if you click on it you can select edit from the menu and enter the expression editor.
You will need an expression like this, to convert your string's spaces to commas and then into a colour:
color_rgb( replace("rgbfargeko",' ',','))
Then click ok and your colors should show up.
answered yesterday
Ian Turton♦Ian Turton
49.9k547115
You missed a closing bracket).
– ahmadhanb
22 hours ago
add a comment |
AS @J. Monticolo supposed, use Data defined expression in symbology properties.
For expression you can simply use:
replace("rgbfargko",' ',',')
Which takse "rgbfargko" string and replace spaces whit commas for proper color formatting. See:
answered yesterday
Oto KalábOto Kaláb
4,11231431
add a comment |
In the layer properties, in the symbology tab, define the color by an expression (link to the QGIS doc) :
color_rgb(
array_get(string_to_array("rgbfargko", ' '), 0),
array_get(string_to_array("rgbfargko", ' '), 1),
array_get(string_to_array("rgbfargko", ' '), 2)
)
Explanation of the code :
1- function string_to_array : transform the field data into an array by splitting at the white space character ;
2- function array_get : get elements of the array, the first item has an index of 0 ;
3- function color_rgb : with 3 arguments (R, G, B), this function return a QGIS color.
EDIT
The solution of @Ian Turton is more visual and simple !
answered yesterday
J. MonticoloJ. Monticolo
1,155217
add a comment |
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3 Answers
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active
oldest
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3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
In the layer styles panel if you click on simple marker, there is a small box to the right of the fill color combo box - if you click on it you can select edit from the menu and enter the expression editor.
You will need an expression like this, to convert your string's spaces to commas and then into a colour:
color_rgb( replace("rgbfargeko",' ',','))
Then click ok and your colors should show up.
answered yesterday
Ian Turton♦Ian Turton
49.9k547115
You missed a closing bracket).
– ahmadhanb
22 hours ago
add a comment |
In the layer styles panel if you click on simple marker, there is a small box to the right of the fill color combo box - if you click on it you can select edit from the menu and enter the expression editor.
You will need an expression like this, to convert your string's spaces to commas and then into a colour:
color_rgb( replace("rgbfargeko",' ',','))
Then click ok and your colors should show up.
answered yesterday
Ian Turton♦Ian Turton
49.9k547115
You missed a closing bracket).
– ahmadhanb
22 hours ago
add a comment |
In the layer styles panel if you click on simple marker, there is a small box to the right of the fill color combo box - if you click on it you can select edit from the menu and enter the expression editor.
You will need an expression like this, to convert your string's spaces to commas and then into a colour:
color_rgb( replace("rgbfargeko",' ',','))
Then click ok and your colors should show up.
answered yesterday
Ian Turton♦Ian Turton
49.9k547115
In the layer styles panel if you click on simple marker, there is a small box to the right of the fill color combo box - if you click on it you can select edit from the menu and enter the expression editor.
You will need an expression like this, to convert your string's spaces to commas and then into a colour:
color_rgb( replace("rgbfargeko",' ',','))
Then click ok and your colors should show up.
answered yesterday
Ian Turton♦Ian Turton
49.9k547115
edited 15 hours ago
answered yesterday
Ian Turton♦Ian Turton
49.9k547115
answered yesterday
Ian Turton♦Ian Turton
49.9k547115
answered yesterday
Ian Turton♦Ian Turton
49.9k547115
49.9k547115
You missed a closing bracket).
– ahmadhanb
22 hours ago
add a comment |
You missed a closing bracket).
– ahmadhanb
22 hours ago
You missed a closing bracket
).– ahmadhanb
22 hours ago
You missed a closing bracket
).– ahmadhanb
22 hours ago
add a comment |
AS @J. Monticolo supposed, use Data defined expression in symbology properties.
For expression you can simply use:
replace("rgbfargko",' ',',')
Which takse "rgbfargko" string and replace spaces whit commas for proper color formatting. See:
answered yesterday
Oto KalábOto Kaláb
4,11231431
add a comment |
AS @J. Monticolo supposed, use Data defined expression in symbology properties.
For expression you can simply use:
replace("rgbfargko",' ',',')
Which takse "rgbfargko" string and replace spaces whit commas for proper color formatting. See:
answered yesterday
Oto KalábOto Kaláb
4,11231431
add a comment |
AS @J. Monticolo supposed, use Data defined expression in symbology properties.
For expression you can simply use:
replace("rgbfargko",' ',',')
Which takse "rgbfargko" string and replace spaces whit commas for proper color formatting. See:
answered yesterday
Oto KalábOto Kaláb
4,11231431
AS @J. Monticolo supposed, use Data defined expression in symbology properties.
For expression you can simply use:
replace("rgbfargko",' ',',')
Which takse "rgbfargko" string and replace spaces whit commas for proper color formatting. See:
answered yesterday
Oto KalábOto Kaláb
4,11231431
answered yesterday
Oto KalábOto Kaláb
4,11231431
answered yesterday
Oto KalábOto Kaláb
4,11231431
answered yesterday
Oto KalábOto Kaláb
4,11231431
4,11231431
add a comment |
add a comment |
In the layer properties, in the symbology tab, define the color by an expression (link to the QGIS doc) :
color_rgb(
array_get(string_to_array("rgbfargko", ' '), 0),
array_get(string_to_array("rgbfargko", ' '), 1),
array_get(string_to_array("rgbfargko", ' '), 2)
)
Explanation of the code :
1- function string_to_array : transform the field data into an array by splitting at the white space character ;
2- function array_get : get elements of the array, the first item has an index of 0 ;
3- function color_rgb : with 3 arguments (R, G, B), this function return a QGIS color.
EDIT
The solution of @Ian Turton is more visual and simple !
answered yesterday
J. MonticoloJ. Monticolo
1,155217
add a comment |
In the layer properties, in the symbology tab, define the color by an expression (link to the QGIS doc) :
color_rgb(
array_get(string_to_array("rgbfargko", ' '), 0),
array_get(string_to_array("rgbfargko", ' '), 1),
array_get(string_to_array("rgbfargko", ' '), 2)
)
Explanation of the code :
1- function string_to_array : transform the field data into an array by splitting at the white space character ;
2- function array_get : get elements of the array, the first item has an index of 0 ;
3- function color_rgb : with 3 arguments (R, G, B), this function return a QGIS color.
EDIT
The solution of @Ian Turton is more visual and simple !
answered yesterday
J. MonticoloJ. Monticolo
1,155217
add a comment |
In the layer properties, in the symbology tab, define the color by an expression (link to the QGIS doc) :
color_rgb(
array_get(string_to_array("rgbfargko", ' '), 0),
array_get(string_to_array("rgbfargko", ' '), 1),
array_get(string_to_array("rgbfargko", ' '), 2)
)
Explanation of the code :
1- function string_to_array : transform the field data into an array by splitting at the white space character ;
2- function array_get : get elements of the array, the first item has an index of 0 ;
3- function color_rgb : with 3 arguments (R, G, B), this function return a QGIS color.
EDIT
The solution of @Ian Turton is more visual and simple !
answered yesterday
J. MonticoloJ. Monticolo
1,155217
In the layer properties, in the symbology tab, define the color by an expression (link to the QGIS doc) :
color_rgb(
array_get(string_to_array("rgbfargko", ' '), 0),
array_get(string_to_array("rgbfargko", ' '), 1),
array_get(string_to_array("rgbfargko", ' '), 2)
)
Explanation of the code :
1- function string_to_array : transform the field data into an array by splitting at the white space character ;
2- function array_get : get elements of the array, the first item has an index of 0 ;
3- function color_rgb : with 3 arguments (R, G, B), this function return a QGIS color.
EDIT
The solution of @Ian Turton is more visual and simple !
answered yesterday
J. MonticoloJ. Monticolo
1,155217
edited yesterday
answered yesterday
J. MonticoloJ. Monticolo
1,155217
answered yesterday
J. MonticoloJ. Monticolo
1,155217
answered yesterday
J. MonticoloJ. Monticolo
1,155217
1,155217
add a comment |
add a comment |
Casairo is a new contributor. Be nice, and check out our Code of Conduct.
Casairo is a new contributor. Be nice, and check out our Code of Conduct.
Casairo is a new contributor. Be nice, and check out our Code of Conduct.
Casairo is a new contributor. Be nice, and check out our Code of Conduct.
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Be aware that by using an expression to set the color as stated answer below you wont be able to automatically generate a legend.... (so the problem is you either set the color manually OR create the legend manually....)
– J.R
yesterday
@J.R Good point, I think its kind of bug, because I suppose that it will generate legend if you use Categorized symbology (with rgb field as category). You can manually change a symbol of every each category, but if the data defined values are set for color, the value is just not taken from the expression. Or I am missing something?
– Oto Kaláb
yesterday