Projecting points on line and calculating distance from line start
I have
- a vector layer with a number of points which correspond to magnetic targets
- axis retrieved from AutoCAD
The task is to project the points on the axis and then calculate the distance of each projected point from the start of the axis. Ideally, I would like the calculated distance to be on the same table as the points so I can know which point each distance refers to.
Moreover, it would be nice to know the perpendicular distance of each point from the reference axis. A picture of the above problem is also presented below.
qgis point projection-mathematics
edited 49 mins ago
Taras
2,0172623
asked 2 hours ago
stamatisstamatis
113
New contributor
stamatis is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I have
- a vector layer with a number of points which correspond to magnetic targets
- axis retrieved from AutoCAD
The task is to project the points on the axis and then calculate the distance of each projected point from the start of the axis. Ideally, I would like the calculated distance to be on the same table as the points so I can know which point each distance refers to.
Moreover, it would be nice to know the perpendicular distance of each point from the reference axis. A picture of the above problem is also presented below.
qgis point projection-mathematics
edited 49 mins ago
Taras
2,0172623
asked 2 hours ago
stamatisstamatis
113
New contributor
stamatis is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I have
- a vector layer with a number of points which correspond to magnetic targets
- axis retrieved from AutoCAD
The task is to project the points on the axis and then calculate the distance of each projected point from the start of the axis. Ideally, I would like the calculated distance to be on the same table as the points so I can know which point each distance refers to.
Moreover, it would be nice to know the perpendicular distance of each point from the reference axis. A picture of the above problem is also presented below.
qgis point projection-mathematics
edited 49 mins ago
Taras
2,0172623
asked 2 hours ago
stamatisstamatis
113
New contributor
stamatis is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I have
- a vector layer with a number of points which correspond to magnetic targets
- axis retrieved from AutoCAD
The task is to project the points on the axis and then calculate the distance of each projected point from the start of the axis. Ideally, I would like the calculated distance to be on the same table as the points so I can know which point each distance refers to.
Moreover, it would be nice to know the perpendicular distance of each point from the reference axis. A picture of the above problem is also presented below.
qgis point projection-mathematics
qgis point projection-mathematics
edited 49 mins ago
Taras
2,0172623
asked 2 hours ago
stamatisstamatis
113
New contributor
stamatis is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 49 mins ago
Taras
2,0172623
asked 2 hours ago
stamatisstamatis
113
New contributor
stamatis is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 49 mins ago
Taras
2,0172623
edited 49 mins ago
Taras
2,0172623
edited 49 mins ago
Taras
2,0172623
2,0172623
asked 2 hours ago
stamatisstamatis
113
New contributor
stamatis is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 hours ago
stamatisstamatis
113
asked 2 hours ago
stamatisstamatis
113
113
New contributor
stamatis is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
stamatis is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
stamatis is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Start the Field Calculator on your point layer's attribute table.
Create a new field by an expression below:
line_locate_point(geometry:=geometry(get_feature('NaMy_FSR', 'id', '1')), point:=$geometry)
Assuming:
- Your line layer name is :
NaMy_FSR
- The line has an attribute value
1in the'id'field. (You can use any field to distinguish the line).
[EDIT]
As to the distance the perpendicular distance of each point from the reference axis;
Not sure if this works, but will you try:
distance(closest_point(geometry(get_feature(‘NaMy_FSR’, ‘id’, ‘1’)), geometry), $geometry)
[revision]
distance(closest_point(geometry(get_feature(‘NaMy_FSR’, ‘id’, ‘1’)), $geometry), $geometry)
answered 2 hours ago
KazuhitoKazuhito
14.4k31576
Is there a way to obtain the projection distance from the line ?
– stamatis
1 hour ago
Hi @stamatis Yes, I think it is possible. Will you post a new question or edit your current question to include this additional requirement?
– Kazuhito
1 hour ago
Question edited. Looking forward for the answer :)
– stamatis
53 mins ago
@stamatis Added another syntax in[EDIT]section. Hopefully it works, but other specialists at this board may help you better.
– Kazuhito
47 mins ago
@Kazuhito, does it play any role which CRS is applied or which CRS the layers are saved in?
– Taras
40 mins ago
|
show 8 more comments
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Start the Field Calculator on your point layer's attribute table.
Create a new field by an expression below:
line_locate_point(geometry:=geometry(get_feature('NaMy_FSR', 'id', '1')), point:=$geometry)
Assuming:
- Your line layer name is :
NaMy_FSR
- The line has an attribute value
1in the'id'field. (You can use any field to distinguish the line).
[EDIT]
As to the distance the perpendicular distance of each point from the reference axis;
Not sure if this works, but will you try:
distance(closest_point(geometry(get_feature(‘NaMy_FSR’, ‘id’, ‘1’)), geometry), $geometry)
[revision]
distance(closest_point(geometry(get_feature(‘NaMy_FSR’, ‘id’, ‘1’)), $geometry), $geometry)
answered 2 hours ago
KazuhitoKazuhito
14.4k31576
Is there a way to obtain the projection distance from the line ?
– stamatis
1 hour ago
Hi @stamatis Yes, I think it is possible. Will you post a new question or edit your current question to include this additional requirement?
– Kazuhito
1 hour ago
Question edited. Looking forward for the answer :)
– stamatis
53 mins ago
@stamatis Added another syntax in[EDIT]section. Hopefully it works, but other specialists at this board may help you better.
– Kazuhito
47 mins ago
@Kazuhito, does it play any role which CRS is applied or which CRS the layers are saved in?
– Taras
40 mins ago
|
show 8 more comments
Start the Field Calculator on your point layer's attribute table.
Create a new field by an expression below:
line_locate_point(geometry:=geometry(get_feature('NaMy_FSR', 'id', '1')), point:=$geometry)
Assuming:
- Your line layer name is :
NaMy_FSR
- The line has an attribute value
1in the'id'field. (You can use any field to distinguish the line).
[EDIT]
As to the distance the perpendicular distance of each point from the reference axis;
Not sure if this works, but will you try:
distance(closest_point(geometry(get_feature(‘NaMy_FSR’, ‘id’, ‘1’)), geometry), $geometry)
[revision]
distance(closest_point(geometry(get_feature(‘NaMy_FSR’, ‘id’, ‘1’)), $geometry), $geometry)
answered 2 hours ago
KazuhitoKazuhito
14.4k31576
Is there a way to obtain the projection distance from the line ?
– stamatis
1 hour ago
Hi @stamatis Yes, I think it is possible. Will you post a new question or edit your current question to include this additional requirement?
– Kazuhito
1 hour ago
Question edited. Looking forward for the answer :)
– stamatis
53 mins ago
@stamatis Added another syntax in[EDIT]section. Hopefully it works, but other specialists at this board may help you better.
– Kazuhito
47 mins ago
@Kazuhito, does it play any role which CRS is applied or which CRS the layers are saved in?
– Taras
40 mins ago
|
show 8 more comments
Start the Field Calculator on your point layer's attribute table.
Create a new field by an expression below:
line_locate_point(geometry:=geometry(get_feature('NaMy_FSR', 'id', '1')), point:=$geometry)
Assuming:
- Your line layer name is :
NaMy_FSR
- The line has an attribute value
1in the'id'field. (You can use any field to distinguish the line).
[EDIT]
As to the distance the perpendicular distance of each point from the reference axis;
Not sure if this works, but will you try:
distance(closest_point(geometry(get_feature(‘NaMy_FSR’, ‘id’, ‘1’)), geometry), $geometry)
[revision]
distance(closest_point(geometry(get_feature(‘NaMy_FSR’, ‘id’, ‘1’)), $geometry), $geometry)
answered 2 hours ago
KazuhitoKazuhito
14.4k31576
Start the Field Calculator on your point layer's attribute table.
Create a new field by an expression below:
line_locate_point(geometry:=geometry(get_feature('NaMy_FSR', 'id', '1')), point:=$geometry)
Assuming:
- Your line layer name is :
NaMy_FSR
- The line has an attribute value
1in the'id'field. (You can use any field to distinguish the line).
[EDIT]
As to the distance the perpendicular distance of each point from the reference axis;
Not sure if this works, but will you try:
distance(closest_point(geometry(get_feature(‘NaMy_FSR’, ‘id’, ‘1’)), geometry), $geometry)
[revision]
distance(closest_point(geometry(get_feature(‘NaMy_FSR’, ‘id’, ‘1’)), $geometry), $geometry)
answered 2 hours ago
KazuhitoKazuhito
14.4k31576
edited 27 mins ago
answered 2 hours ago
KazuhitoKazuhito
14.4k31576
answered 2 hours ago
KazuhitoKazuhito
14.4k31576
answered 2 hours ago
KazuhitoKazuhito
14.4k31576
14.4k31576
Is there a way to obtain the projection distance from the line ?
– stamatis
1 hour ago
Hi @stamatis Yes, I think it is possible. Will you post a new question or edit your current question to include this additional requirement?
– Kazuhito
1 hour ago
Question edited. Looking forward for the answer :)
– stamatis
53 mins ago
@stamatis Added another syntax in[EDIT]section. Hopefully it works, but other specialists at this board may help you better.
– Kazuhito
47 mins ago
@Kazuhito, does it play any role which CRS is applied or which CRS the layers are saved in?
– Taras
40 mins ago
|
show 8 more comments
Is there a way to obtain the projection distance from the line ?
– stamatis
1 hour ago
Hi @stamatis Yes, I think it is possible. Will you post a new question or edit your current question to include this additional requirement?
– Kazuhito
1 hour ago
Question edited. Looking forward for the answer :)
– stamatis
53 mins ago
@stamatis Added another syntax in[EDIT]section. Hopefully it works, but other specialists at this board may help you better.
– Kazuhito
47 mins ago
@Kazuhito, does it play any role which CRS is applied or which CRS the layers are saved in?
– Taras
40 mins ago
Is there a way to obtain the projection distance from the line ?
– stamatis
1 hour ago
Is there a way to obtain the projection distance from the line ?
– stamatis
1 hour ago
Hi @stamatis Yes, I think it is possible. Will you post a new question or edit your current question to include this additional requirement?
– Kazuhito
1 hour ago
Hi @stamatis Yes, I think it is possible. Will you post a new question or edit your current question to include this additional requirement?
– Kazuhito
1 hour ago
Question edited. Looking forward for the answer :)
– stamatis
53 mins ago
Question edited. Looking forward for the answer :)
– stamatis
53 mins ago
@stamatis Added another syntax in
[EDIT] section. Hopefully it works, but other specialists at this board may help you better.– Kazuhito
47 mins ago
@stamatis Added another syntax in
[EDIT] section. Hopefully it works, but other specialists at this board may help you better.– Kazuhito
47 mins ago
@Kazuhito, does it play any role which CRS is applied or which CRS the layers are saved in?
– Taras
40 mins ago
@Kazuhito, does it play any role which CRS is applied or which CRS the layers are saved in?
– Taras
40 mins ago
|
show 8 more comments
stamatis is a new contributor. Be nice, and check out our Code of Conduct.
stamatis is a new contributor. Be nice, and check out our Code of Conduct.
stamatis is a new contributor. Be nice, and check out our Code of Conduct.
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