Automatic calculation of line orientations in QGIS
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I was able to see the types of cables ("* TYPE " in my data table) entered manually and the length of these cables (automatically calculated using the " Slength *" function with the name LONG in the field calculator). this whole info on the same label
("*TYPE||'n'||LONG||'m'*").
It is now impossible to make visible the orientation of the cables (Shape of line type) in gradians (between 0 and 400), with the origin reference in the Eastern direction.
qgis
edited May 27 at 12:44
Mat
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asked May 27 at 10:24
Gil MirandaGil Miranda
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add a comment
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I was able to see the types of cables ("* TYPE " in my data table) entered manually and the length of these cables (automatically calculated using the " Slength *" function with the name LONG in the field calculator). this whole info on the same label
("*TYPE||'n'||LONG||'m'*").
It is now impossible to make visible the orientation of the cables (Shape of line type) in gradians (between 0 and 400), with the origin reference in the Eastern direction.
qgis
edited May 27 at 12:44
Mat
1,1311 gold badge6 silver badges17 bronze badges
asked May 27 at 10:24
Gil MirandaGil Miranda
133 bronze badges
add a comment
|
I was able to see the types of cables ("* TYPE " in my data table) entered manually and the length of these cables (automatically calculated using the " Slength *" function with the name LONG in the field calculator). this whole info on the same label
("*TYPE||'n'||LONG||'m'*").
It is now impossible to make visible the orientation of the cables (Shape of line type) in gradians (between 0 and 400), with the origin reference in the Eastern direction.
qgis
edited May 27 at 12:44
Mat
1,1311 gold badge6 silver badges17 bronze badges
asked May 27 at 10:24
Gil MirandaGil Miranda
133 bronze badges
I was able to see the types of cables ("* TYPE " in my data table) entered manually and the length of these cables (automatically calculated using the " Slength *" function with the name LONG in the field calculator). this whole info on the same label
("*TYPE||'n'||LONG||'m'*").
It is now impossible to make visible the orientation of the cables (Shape of line type) in gradians (between 0 and 400), with the origin reference in the Eastern direction.
qgis
qgis
edited May 27 at 12:44
Mat
1,1311 gold badge6 silver badges17 bronze badges
asked May 27 at 10:24
Gil MirandaGil Miranda
133 bronze badges
edited May 27 at 12:44
Mat
1,1311 gold badge6 silver badges17 bronze badges
asked May 27 at 10:24
Gil MirandaGil Miranda
133 bronze badges
edited May 27 at 12:44
Mat
1,1311 gold badge6 silver badges17 bronze badges
edited May 27 at 12:44
Mat
1,1311 gold badge6 silver badges17 bronze badges
edited May 27 at 12:44
Mat
1,1311 gold badge6 silver badges17 bronze badges
1,1311 gold badge6 silver badges17 bronze badges
asked May 27 at 10:24
Gil MirandaGil Miranda
133 bronze badges
asked May 27 at 10:24
Gil MirandaGil Miranda
133 bronze badges
asked May 27 at 10:24
Gil MirandaGil Miranda
133 bronze badges
133 bronze badges
add a comment
|
add a comment
|
1 Answer
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To get line angle you can use field calculator depending what exactly you need:
- line_interpolate_angle(geometry,distance)
- angle_at_vertex(geometry,vertex)
For more details check help in field calculator: 
Result is in degrees (north origin), to convert it in grads you need to multiply by (400/360).
So field calculator expression would be something like: line_interpolate_angle($geometry,0) * (400 / 360).
Since you need angle originating from east you will need to add 90°: (line_interpolate_angle($geometry,0)+90 )* (400 / 360) and substract 400 for features that have value above 400g.
answered May 27 at 11:19
MatMat
1,1311 gold badge6 silver badges17 bronze badges
I'll have to do some ajusts but it was really helpfull. Thx
– Gil Miranda
May 27 at 12:57
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
To get line angle you can use field calculator depending what exactly you need:
- line_interpolate_angle(geometry,distance)
- angle_at_vertex(geometry,vertex)
For more details check help in field calculator:
Result is in degrees (north origin), to convert it in grads you need to multiply by (400/360).
So field calculator expression would be something like: line_interpolate_angle($geometry,0) * (400 / 360).
Since you need angle originating from east you will need to add 90°: (line_interpolate_angle($geometry,0)+90 )* (400 / 360) and substract 400 for features that have value above 400g.
answered May 27 at 11:19
MatMat
1,1311 gold badge6 silver badges17 bronze badges
I'll have to do some ajusts but it was really helpfull. Thx
– Gil Miranda
May 27 at 12:57
add a comment
|
To get line angle you can use field calculator depending what exactly you need:
- line_interpolate_angle(geometry,distance)
- angle_at_vertex(geometry,vertex)
For more details check help in field calculator:
Result is in degrees (north origin), to convert it in grads you need to multiply by (400/360).
So field calculator expression would be something like: line_interpolate_angle($geometry,0) * (400 / 360).
Since you need angle originating from east you will need to add 90°: (line_interpolate_angle($geometry,0)+90 )* (400 / 360) and substract 400 for features that have value above 400g.
answered May 27 at 11:19
MatMat
1,1311 gold badge6 silver badges17 bronze badges
I'll have to do some ajusts but it was really helpfull. Thx
– Gil Miranda
May 27 at 12:57
add a comment
|
To get line angle you can use field calculator depending what exactly you need:
- line_interpolate_angle(geometry,distance)
- angle_at_vertex(geometry,vertex)
For more details check help in field calculator:
Result is in degrees (north origin), to convert it in grads you need to multiply by (400/360).
So field calculator expression would be something like: line_interpolate_angle($geometry,0) * (400 / 360).
Since you need angle originating from east you will need to add 90°: (line_interpolate_angle($geometry,0)+90 )* (400 / 360) and substract 400 for features that have value above 400g.
answered May 27 at 11:19
MatMat
1,1311 gold badge6 silver badges17 bronze badges
To get line angle you can use field calculator depending what exactly you need:
- line_interpolate_angle(geometry,distance)
- angle_at_vertex(geometry,vertex)
For more details check help in field calculator:
Result is in degrees (north origin), to convert it in grads you need to multiply by (400/360).
So field calculator expression would be something like: line_interpolate_angle($geometry,0) * (400 / 360).
Since you need angle originating from east you will need to add 90°: (line_interpolate_angle($geometry,0)+90 )* (400 / 360) and substract 400 for features that have value above 400g.
answered May 27 at 11:19
MatMat
1,1311 gold badge6 silver badges17 bronze badges
edited May 27 at 11:27
answered May 27 at 11:19
MatMat
1,1311 gold badge6 silver badges17 bronze badges
answered May 27 at 11:19
MatMat
1,1311 gold badge6 silver badges17 bronze badges
answered May 27 at 11:19
MatMat
1,1311 gold badge6 silver badges17 bronze badges
1,1311 gold badge6 silver badges17 bronze badges
I'll have to do some ajusts but it was really helpfull. Thx
– Gil Miranda
May 27 at 12:57
add a comment
|
I'll have to do some ajusts but it was really helpfull. Thx
– Gil Miranda
May 27 at 12:57
I'll have to do some ajusts but it was really helpfull. Thx
– Gil Miranda
May 27 at 12:57
I'll have to do some ajusts but it was really helpfull. Thx
– Gil Miranda
May 27 at 12:57
add a comment
|
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