Change color polygons by area of polygons
I have polygons with the area in the attribute table and I want change polygons to red color if they have area less 70.
qgis
edited yesterday
Vince
14.4k32647
asked yesterday
Evgeny Ryvkin
211
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I have polygons with the area in the attribute table and I want change polygons to red color if they have area less 70.
qgis
edited yesterday
Vince
14.4k32647
asked yesterday
Evgeny Ryvkin
211
New contributor
Evgeny Ryvkin is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Thank you for help, yes is also a GOOD answer, if I want to save the changes in GeoJSON, can I do it or I need to create an attribute table different column and save the color by a polygon?
– Evgeny Ryvkin
yesterday
See this for saving styles in geojson: gis.stackexchange.com/questions/22474/… If this does not answer your question open up a new one. Also feel free to mark the answer that answered your question the best as accepted. See our short Tour.
– MrXsquared
yesterday
is help me and useful, I just try to learn more about this program.
– Evgeny Ryvkin
yesterday
Unrelated to your question, but I noticed that the feature in the top-left of your screenshot looks like it has self-intersecting boundaries, which would make it an invalid geometry.
– csk
yesterday
add a comment |
I have polygons with the area in the attribute table and I want change polygons to red color if they have area less 70.
qgis
edited yesterday
Vince
14.4k32647
asked yesterday
Evgeny Ryvkin
211
New contributor
Evgeny Ryvkin is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I have polygons with the area in the attribute table and I want change polygons to red color if they have area less 70.
qgis
qgis
edited yesterday
Vince
14.4k32647
asked yesterday
Evgeny Ryvkin
211
New contributor
Evgeny Ryvkin is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited yesterday
Vince
14.4k32647
asked yesterday
Evgeny Ryvkin
211
New contributor
Evgeny Ryvkin is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited yesterday
Vince
14.4k32647
edited yesterday
Vince
14.4k32647
edited yesterday
Vince
14.4k32647
14.4k32647
asked yesterday
Evgeny Ryvkin
211
New contributor
Evgeny Ryvkin is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked yesterday
Evgeny Ryvkin
211
asked yesterday
Evgeny Ryvkin
211
211
New contributor
Evgeny Ryvkin is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Evgeny Ryvkin is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Evgeny Ryvkin is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Thank you for help, yes is also a GOOD answer, if I want to save the changes in GeoJSON, can I do it or I need to create an attribute table different column and save the color by a polygon?
– Evgeny Ryvkin
yesterday
See this for saving styles in geojson: gis.stackexchange.com/questions/22474/… If this does not answer your question open up a new one. Also feel free to mark the answer that answered your question the best as accepted. See our short Tour.
– MrXsquared
yesterday
is help me and useful, I just try to learn more about this program.
– Evgeny Ryvkin
yesterday
Unrelated to your question, but I noticed that the feature in the top-left of your screenshot looks like it has self-intersecting boundaries, which would make it an invalid geometry.
– csk
yesterday
add a comment |
Thank you for help, yes is also a GOOD answer, if I want to save the changes in GeoJSON, can I do it or I need to create an attribute table different column and save the color by a polygon?
– Evgeny Ryvkin
yesterday
See this for saving styles in geojson: gis.stackexchange.com/questions/22474/… If this does not answer your question open up a new one. Also feel free to mark the answer that answered your question the best as accepted. See our short Tour.
– MrXsquared
yesterday
is help me and useful, I just try to learn more about this program.
– Evgeny Ryvkin
yesterday
Unrelated to your question, but I noticed that the feature in the top-left of your screenshot looks like it has self-intersecting boundaries, which would make it an invalid geometry.
– csk
yesterday
Thank you for help, yes is also a GOOD answer, if I want to save the changes in GeoJSON, can I do it or I need to create an attribute table different column and save the color by a polygon?
– Evgeny Ryvkin
yesterday
Thank you for help, yes is also a GOOD answer, if I want to save the changes in GeoJSON, can I do it or I need to create an attribute table different column and save the color by a polygon?
– Evgeny Ryvkin
yesterday
See this for saving styles in geojson: gis.stackexchange.com/questions/22474/… If this does not answer your question open up a new one. Also feel free to mark the answer that answered your question the best as accepted. See our short Tour.
– MrXsquared
yesterday
See this for saving styles in geojson: gis.stackexchange.com/questions/22474/… If this does not answer your question open up a new one. Also feel free to mark the answer that answered your question the best as accepted. See our short Tour.
– MrXsquared
yesterday
is help me and useful, I just try to learn more about this program.
– Evgeny Ryvkin
yesterday
is help me and useful, I just try to learn more about this program.
– Evgeny Ryvkin
yesterday
Unrelated to your question, but I noticed that the feature in the top-left of your screenshot looks like it has self-intersecting boundaries, which would make it an invalid geometry.
– csk
yesterday
Unrelated to your question, but I noticed that the feature in the top-left of your screenshot looks like it has self-intersecting boundaries, which would make it an invalid geometry.
– csk
yesterday
add a comment |
2 Answers
2
active
oldest
votes
Create a rule based symbology like this:
One with the rule "area" < 70 and one with the rule ELSE
("area" refers to an attribute value while $area calculates the area; use the one you need; according to your sceenshot it is "area")
answered yesterday
MrXsquared
799216
Many Thanks to you, that helps me!
– Evgeny Ryvkin
yesterday
@EvgenyRyvkin you can also use a graduated renderer on the $area variable (rather than a SHAPE_AREA column), then set your own class breaks and colours.
– DPSSpatial
yesterday
add a comment |
Here's another method. It's not really any better than MrXsquared's answer, but I had already started writing it.
Use data-defined settings to control fill color
with this expression:
if("area"<70, '#ff0000','#00ff00')
This expression will set the fill color to red (#ff0000 in hex notation) when the area is less than 70, and green otherwise.
If you want to use different shades of red and green, you can get the hex notation for the desired color from the "select color" dialog - just select the color you want and scroll down to find the hex notation near the bottom.
answered yesterday
csk
6,890733
Thank you for your answer, yes is a good example of how can I write different color in hexa and using data-defined.
– Evgeny Ryvkin
yesterday
add a comment |
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2 Answers
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active
oldest
votes
2 Answers
2
active
oldest
votes
active
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votes
active
oldest
votes
Create a rule based symbology like this:
One with the rule "area" < 70 and one with the rule ELSE
("area" refers to an attribute value while $area calculates the area; use the one you need; according to your sceenshot it is "area")
answered yesterday
MrXsquared
799216
Many Thanks to you, that helps me!
– Evgeny Ryvkin
yesterday
@EvgenyRyvkin you can also use a graduated renderer on the $area variable (rather than a SHAPE_AREA column), then set your own class breaks and colours.
– DPSSpatial
yesterday
add a comment |
Create a rule based symbology like this:
One with the rule "area" < 70 and one with the rule ELSE
("area" refers to an attribute value while $area calculates the area; use the one you need; according to your sceenshot it is "area")
answered yesterday
MrXsquared
799216
Many Thanks to you, that helps me!
– Evgeny Ryvkin
yesterday
@EvgenyRyvkin you can also use a graduated renderer on the $area variable (rather than a SHAPE_AREA column), then set your own class breaks and colours.
– DPSSpatial
yesterday
add a comment |
Create a rule based symbology like this:
One with the rule "area" < 70 and one with the rule ELSE
("area" refers to an attribute value while $area calculates the area; use the one you need; according to your sceenshot it is "area")
answered yesterday
MrXsquared
799216
Create a rule based symbology like this:
One with the rule "area" < 70 and one with the rule ELSE
("area" refers to an attribute value while $area calculates the area; use the one you need; according to your sceenshot it is "area")
answered yesterday
MrXsquared
799216
answered yesterday
MrXsquared
799216
answered yesterday
MrXsquared
799216
answered yesterday
MrXsquared
799216
799216
Many Thanks to you, that helps me!
– Evgeny Ryvkin
yesterday
@EvgenyRyvkin you can also use a graduated renderer on the $area variable (rather than a SHAPE_AREA column), then set your own class breaks and colours.
– DPSSpatial
yesterday
add a comment |
Many Thanks to you, that helps me!
– Evgeny Ryvkin
yesterday
@EvgenyRyvkin you can also use a graduated renderer on the $area variable (rather than a SHAPE_AREA column), then set your own class breaks and colours.
– DPSSpatial
yesterday
Many Thanks to you, that helps me!
– Evgeny Ryvkin
yesterday
Many Thanks to you, that helps me!
– Evgeny Ryvkin
yesterday
@EvgenyRyvkin you can also use a graduated renderer on the $area variable (rather than a SHAPE_AREA column), then set your own class breaks and colours.
– DPSSpatial
yesterday
@EvgenyRyvkin you can also use a graduated renderer on the $area variable (rather than a SHAPE_AREA column), then set your own class breaks and colours.
– DPSSpatial
yesterday
add a comment |
Here's another method. It's not really any better than MrXsquared's answer, but I had already started writing it.
Use data-defined settings to control fill color
with this expression:
if("area"<70, '#ff0000','#00ff00')
This expression will set the fill color to red (#ff0000 in hex notation) when the area is less than 70, and green otherwise.
If you want to use different shades of red and green, you can get the hex notation for the desired color from the "select color" dialog - just select the color you want and scroll down to find the hex notation near the bottom.
answered yesterday
csk
6,890733
Thank you for your answer, yes is a good example of how can I write different color in hexa and using data-defined.
– Evgeny Ryvkin
yesterday
add a comment |
Here's another method. It's not really any better than MrXsquared's answer, but I had already started writing it.
Use data-defined settings to control fill color
with this expression:
if("area"<70, '#ff0000','#00ff00')
This expression will set the fill color to red (#ff0000 in hex notation) when the area is less than 70, and green otherwise.
If you want to use different shades of red and green, you can get the hex notation for the desired color from the "select color" dialog - just select the color you want and scroll down to find the hex notation near the bottom.
answered yesterday
csk
6,890733
Thank you for your answer, yes is a good example of how can I write different color in hexa and using data-defined.
– Evgeny Ryvkin
yesterday
add a comment |
Here's another method. It's not really any better than MrXsquared's answer, but I had already started writing it.
Use data-defined settings to control fill color
with this expression:
if("area"<70, '#ff0000','#00ff00')
This expression will set the fill color to red (#ff0000 in hex notation) when the area is less than 70, and green otherwise.
If you want to use different shades of red and green, you can get the hex notation for the desired color from the "select color" dialog - just select the color you want and scroll down to find the hex notation near the bottom.
answered yesterday
csk
6,890733
Here's another method. It's not really any better than MrXsquared's answer, but I had already started writing it.
Use data-defined settings to control fill color
with this expression:
if("area"<70, '#ff0000','#00ff00')
This expression will set the fill color to red (#ff0000 in hex notation) when the area is less than 70, and green otherwise.
If you want to use different shades of red and green, you can get the hex notation for the desired color from the "select color" dialog - just select the color you want and scroll down to find the hex notation near the bottom.
answered yesterday
csk
6,890733
answered yesterday
csk
6,890733
answered yesterday
csk
6,890733
answered yesterday
csk
6,890733
6,890733
Thank you for your answer, yes is a good example of how can I write different color in hexa and using data-defined.
– Evgeny Ryvkin
yesterday
add a comment |
Thank you for your answer, yes is a good example of how can I write different color in hexa and using data-defined.
– Evgeny Ryvkin
yesterday
Thank you for your answer, yes is a good example of how can I write different color in hexa and using data-defined.
– Evgeny Ryvkin
yesterday
Thank you for your answer, yes is a good example of how can I write different color in hexa and using data-defined.
– Evgeny Ryvkin
yesterday
add a comment |
Evgeny Ryvkin is a new contributor. Be nice, and check out our Code of Conduct.
Evgeny Ryvkin is a new contributor. Be nice, and check out our Code of Conduct.
Evgeny Ryvkin is a new contributor. Be nice, and check out our Code of Conduct.
Evgeny Ryvkin is a new contributor. Be nice, and check out our Code of Conduct.
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Thank you for help, yes is also a GOOD answer, if I want to save the changes in GeoJSON, can I do it or I need to create an attribute table different column and save the color by a polygon?
– Evgeny Ryvkin
yesterday
See this for saving styles in geojson: gis.stackexchange.com/questions/22474/… If this does not answer your question open up a new one. Also feel free to mark the answer that answered your question the best as accepted. See our short Tour.
– MrXsquared
yesterday
is help me and useful, I just try to learn more about this program.
– Evgeny Ryvkin
yesterday
Unrelated to your question, but I noticed that the feature in the top-left of your screenshot looks like it has self-intersecting boundaries, which would make it an invalid geometry.
– csk
yesterday