QGIS Geometry Generator Line Type
I am trying to create a line style for a multiline geometry. I am hoping to create a linetype which looks like the following
The Points are not an issue, its the line/lines entering and exiting at the nodes. I was looking to use the Geometry Generator to solve the issue, by creating a buffer, based on the midpoint of each section of the multiline geometry, less the length of the start line and end line and using dissolve to create the line.
The dataset is a PostGIS vector dataset, I cant duplicate or break the lines into individual lines.
qgis postgis geometry-generator
edited 8 hours ago
PolyGeo♦
53.8k1781244
asked yesterday
Richard McDonnellRichard McDonnell
657
add a comment |
I am trying to create a line style for a multiline geometry. I am hoping to create a linetype which looks like the following
The Points are not an issue, its the line/lines entering and exiting at the nodes. I was looking to use the Geometry Generator to solve the issue, by creating a buffer, based on the midpoint of each section of the multiline geometry, less the length of the start line and end line and using dissolve to create the line.
The dataset is a PostGIS vector dataset, I cant duplicate or break the lines into individual lines.
qgis postgis geometry-generator
edited 8 hours ago
PolyGeo♦
53.8k1781244
asked yesterday
Richard McDonnellRichard McDonnell
657
add a comment |
I am trying to create a line style for a multiline geometry. I am hoping to create a linetype which looks like the following
The Points are not an issue, its the line/lines entering and exiting at the nodes. I was looking to use the Geometry Generator to solve the issue, by creating a buffer, based on the midpoint of each section of the multiline geometry, less the length of the start line and end line and using dissolve to create the line.
The dataset is a PostGIS vector dataset, I cant duplicate or break the lines into individual lines.
qgis postgis geometry-generator
edited 8 hours ago
PolyGeo♦
53.8k1781244
asked yesterday
Richard McDonnellRichard McDonnell
657
I am trying to create a line style for a multiline geometry. I am hoping to create a linetype which looks like the following
The Points are not an issue, its the line/lines entering and exiting at the nodes. I was looking to use the Geometry Generator to solve the issue, by creating a buffer, based on the midpoint of each section of the multiline geometry, less the length of the start line and end line and using dissolve to create the line.
The dataset is a PostGIS vector dataset, I cant duplicate or break the lines into individual lines.
qgis postgis geometry-generator
qgis postgis geometry-generator
edited 8 hours ago
PolyGeo♦
53.8k1781244
asked yesterday
Richard McDonnellRichard McDonnell
657
edited 8 hours ago
PolyGeo♦
53.8k1781244
asked yesterday
Richard McDonnellRichard McDonnell
657
edited 8 hours ago
PolyGeo♦
53.8k1781244
edited 8 hours ago
PolyGeo♦
53.8k1781244
edited 8 hours ago
PolyGeo♦
53.8k1781244
53.8k1781244
asked yesterday
Richard McDonnellRichard McDonnell
657
asked yesterday
Richard McDonnellRichard McDonnell
657
asked yesterday
Richard McDonnellRichard McDonnell
657
657
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
You can use the following expression together with geometry generator. Use Linestring as geometry type.
intersection(buffer(nodes_to_points( $geometry),2000),$geometry)
Adjust the buffer distance to your needs.
tested in QGIS 3.6
answered yesterday
MrXsquaredMrXsquared
1,8861618
Well done. I was working on a similar answer but I couldn't find the functionnodes_to_points()because I was searching for "vertex" instead of "note" in the expression builder. So my method required exporting the vertices as a separate layer.
– csk
yesterday
MrXsquared, Thank you very much for this, much appreciated!!
– Richard McDonnell
8 hours ago
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You can use the following expression together with geometry generator. Use Linestring as geometry type.
intersection(buffer(nodes_to_points( $geometry),2000),$geometry)
Adjust the buffer distance to your needs.
tested in QGIS 3.6
answered yesterday
MrXsquaredMrXsquared
1,8861618
Well done. I was working on a similar answer but I couldn't find the functionnodes_to_points()because I was searching for "vertex" instead of "note" in the expression builder. So my method required exporting the vertices as a separate layer.
– csk
yesterday
MrXsquared, Thank you very much for this, much appreciated!!
– Richard McDonnell
8 hours ago
add a comment |
You can use the following expression together with geometry generator. Use Linestring as geometry type.
intersection(buffer(nodes_to_points( $geometry),2000),$geometry)
Adjust the buffer distance to your needs.
tested in QGIS 3.6
answered yesterday
MrXsquaredMrXsquared
1,8861618
Well done. I was working on a similar answer but I couldn't find the functionnodes_to_points()because I was searching for "vertex" instead of "note" in the expression builder. So my method required exporting the vertices as a separate layer.
– csk
yesterday
MrXsquared, Thank you very much for this, much appreciated!!
– Richard McDonnell
8 hours ago
add a comment |
You can use the following expression together with geometry generator. Use Linestring as geometry type.
intersection(buffer(nodes_to_points( $geometry),2000),$geometry)
Adjust the buffer distance to your needs.
tested in QGIS 3.6
answered yesterday
MrXsquaredMrXsquared
1,8861618
You can use the following expression together with geometry generator. Use Linestring as geometry type.
intersection(buffer(nodes_to_points( $geometry),2000),$geometry)
Adjust the buffer distance to your needs.
tested in QGIS 3.6
answered yesterday
MrXsquaredMrXsquared
1,8861618
answered yesterday
MrXsquaredMrXsquared
1,8861618
answered yesterday
MrXsquaredMrXsquared
1,8861618
answered yesterday
MrXsquaredMrXsquared
1,8861618
1,8861618
Well done. I was working on a similar answer but I couldn't find the functionnodes_to_points()because I was searching for "vertex" instead of "note" in the expression builder. So my method required exporting the vertices as a separate layer.
– csk
yesterday
MrXsquared, Thank you very much for this, much appreciated!!
– Richard McDonnell
8 hours ago
add a comment |
Well done. I was working on a similar answer but I couldn't find the functionnodes_to_points()because I was searching for "vertex" instead of "note" in the expression builder. So my method required exporting the vertices as a separate layer.
– csk
yesterday
MrXsquared, Thank you very much for this, much appreciated!!
– Richard McDonnell
8 hours ago
Well done. I was working on a similar answer but I couldn't find the function
nodes_to_points() because I was searching for "vertex" instead of "note" in the expression builder. So my method required exporting the vertices as a separate layer.– csk
yesterday
Well done. I was working on a similar answer but I couldn't find the function
nodes_to_points() because I was searching for "vertex" instead of "note" in the expression builder. So my method required exporting the vertices as a separate layer.– csk
yesterday
MrXsquared, Thank you very much for this, much appreciated!!
– Richard McDonnell
8 hours ago
MrXsquared, Thank you very much for this, much appreciated!!
– Richard McDonnell
8 hours ago
add a comment |
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