Create mid point from line layer The Next CEO of Stack OverflowIs QgsMapLayerRegistry removed...
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Create mid point from line layer
The Next CEO of Stack OverflowIs QgsMapLayerRegistry removed in QGIS3?Finding middle point (midpoint) of line in QGIS?How do I create an outline layer for multiple blocks of points?Copying point features along line features by predetermined distanceNode-line minimum distance: draw the minimum distance point locationpoint created on a line not precisely on lineParts of the lines aren't split when using Split Line At PointQGIS plugin that adds a point along a line at a specified distance?Adding M values to point feature attribute table in ArcmapFinding line with minimum distance to point and update attribute of points?Finding which side of closest polyline point lies on in QGIS?Adding Points to line at certain distance using QGIS?
Apologies if this has been asked before and I’ve missed it with my searches. In QGIS I am trying to create a new point layer based on the mid point of a line layer (and keep all the feature attributes in the table).
For example, one line feature becomes one point, located on the mid/center point of the line. Points to lines only seems to work on nodes, and Create points along lines only seems to work at fixed distances?
qgis point line distance points-to-line
edited Oct 19 '17 at 19:19
whyzar
10.7k92866
asked Oct 12 '17 at 14:48
user107128user107128
264
add a comment |
Apologies if this has been asked before and I’ve missed it with my searches. In QGIS I am trying to create a new point layer based on the mid point of a line layer (and keep all the feature attributes in the table).
For example, one line feature becomes one point, located on the mid/center point of the line. Points to lines only seems to work on nodes, and Create points along lines only seems to work at fixed distances?
qgis point line distance points-to-line
edited Oct 19 '17 at 19:19
whyzar
10.7k92866
asked Oct 12 '17 at 14:48
user107128user107128
264
add a comment |
Apologies if this has been asked before and I’ve missed it with my searches. In QGIS I am trying to create a new point layer based on the mid point of a line layer (and keep all the feature attributes in the table).
For example, one line feature becomes one point, located on the mid/center point of the line. Points to lines only seems to work on nodes, and Create points along lines only seems to work at fixed distances?
qgis point line distance points-to-line
edited Oct 19 '17 at 19:19
whyzar
10.7k92866
asked Oct 12 '17 at 14:48
user107128user107128
264
Apologies if this has been asked before and I’ve missed it with my searches. In QGIS I am trying to create a new point layer based on the mid point of a line layer (and keep all the feature attributes in the table).
For example, one line feature becomes one point, located on the mid/center point of the line. Points to lines only seems to work on nodes, and Create points along lines only seems to work at fixed distances?
qgis point line distance points-to-line
qgis point line distance points-to-line
edited Oct 19 '17 at 19:19
whyzar
10.7k92866
asked Oct 12 '17 at 14:48
user107128user107128
264
edited Oct 19 '17 at 19:19
whyzar
10.7k92866
asked Oct 12 '17 at 14:48
user107128user107128
264
edited Oct 19 '17 at 19:19
whyzar
10.7k92866
edited Oct 19 '17 at 19:19
whyzar
10.7k92866
edited Oct 19 '17 at 19:19
whyzar
10.7k92866
10.7k92866
asked Oct 12 '17 at 14:48
user107128user107128
264
asked Oct 12 '17 at 14:48
user107128user107128
264
asked Oct 12 '17 at 14:48
user107128user107128
264
264
add a comment |
add a comment |
4 Answers
4
active
oldest
votes
If python is Ok for you, you can easily do that with that code snippet.
Copy/paste this code in the editor of the python console, select your line layer and run the script!
layer = iface.activeLayer()
temp = QgsVectorLayer("Point?crs=epsg:2154", "result", "memory")
temp.startEditing()
attrs = layer.dataProvider().fields().toList()
temp_prov = temp.dataProvider()
temp_prov.addAttributes(attrs)
temp.updateFields()
for elem in layer.getFeatures():
feat = QgsFeature()
geom = elem.geometry().interpolate(elem.geometry().length()/2)
feat.setGeometry(geom)
feat.setAttributes(elem.attributes())
temp.addFeatures([feat])
temp.updateExtents()
temp.commitChanges()
QgsMapLayerRegistry.instance().addMapLayer(temp)
This code also take care about keeping the attributes of the line Layer.
Here is my result on a set of line :
answered Oct 12 '17 at 15:10
YoLecomteYoLecomte
2,085218
Thanks for this. Just to note that the last line doesn't work in QGIS 3, the following works instead:QgsProject.instance().addMapLayer(temp)Credit to Abhijit Gujar.
– TeddyTedTed
Jan 3 at 12:03
@TeddyTedTed You are right, thanks for pointing this!
– YoLecomte
Jan 3 at 22:03
add a comment |
You can use the GDAL/OGR tool: Create points along lines.
Make sure you specify 0.5 as the distance. This calculates the fraction of the total length (not the distance) as the tool incorporates the ST_Line_Interpolate_Point function.
Here is the default settings shown for me using QGIS 2.18.2 for Win7 64-bit:
The attributes are also carried over to the output point layer.
answered Oct 12 '17 at 15:12
JosephJoseph
58.5k7100205
add a comment |
I would suggest you use MMQGIS plugin that will allow you to find the mid point of the layer.
This provide a great resource to learn more about the plugin and the features. You would need to add the plugin via the repository in QGIS Describes use of MMQGIS, a set of Python vector map layer plugins for Quantum GIS
answered Oct 12 '17 at 15:02
whyzarwhyzar
10.7k92866
add a comment |
I use a two steps solution:
-First I make count densification with a count equals to one, this adds a mid point to every segment.
-Then I extract specific nodes, indicating node number 1.
I use this solution because I keep not only the mid point, also the angle of the segment comes as an attribute.
I have a model with the two steps inside, I only have to insert the lines layer
answered 7 mins ago
Juan Francisco Garrido RiteJuan Francisco Garrido Rite
1
New contributor
Juan Francisco Garrido Rite 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 |
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4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
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active
oldest
votes
If python is Ok for you, you can easily do that with that code snippet.
Copy/paste this code in the editor of the python console, select your line layer and run the script!
layer = iface.activeLayer()
temp = QgsVectorLayer("Point?crs=epsg:2154", "result", "memory")
temp.startEditing()
attrs = layer.dataProvider().fields().toList()
temp_prov = temp.dataProvider()
temp_prov.addAttributes(attrs)
temp.updateFields()
for elem in layer.getFeatures():
feat = QgsFeature()
geom = elem.geometry().interpolate(elem.geometry().length()/2)
feat.setGeometry(geom)
feat.setAttributes(elem.attributes())
temp.addFeatures([feat])
temp.updateExtents()
temp.commitChanges()
QgsMapLayerRegistry.instance().addMapLayer(temp)
This code also take care about keeping the attributes of the line Layer.
Here is my result on a set of line :
answered Oct 12 '17 at 15:10
YoLecomteYoLecomte
2,085218
Thanks for this. Just to note that the last line doesn't work in QGIS 3, the following works instead:QgsProject.instance().addMapLayer(temp)Credit to Abhijit Gujar.
– TeddyTedTed
Jan 3 at 12:03
@TeddyTedTed You are right, thanks for pointing this!
– YoLecomte
Jan 3 at 22:03
add a comment |
If python is Ok for you, you can easily do that with that code snippet.
Copy/paste this code in the editor of the python console, select your line layer and run the script!
layer = iface.activeLayer()
temp = QgsVectorLayer("Point?crs=epsg:2154", "result", "memory")
temp.startEditing()
attrs = layer.dataProvider().fields().toList()
temp_prov = temp.dataProvider()
temp_prov.addAttributes(attrs)
temp.updateFields()
for elem in layer.getFeatures():
feat = QgsFeature()
geom = elem.geometry().interpolate(elem.geometry().length()/2)
feat.setGeometry(geom)
feat.setAttributes(elem.attributes())
temp.addFeatures([feat])
temp.updateExtents()
temp.commitChanges()
QgsMapLayerRegistry.instance().addMapLayer(temp)
This code also take care about keeping the attributes of the line Layer.
Here is my result on a set of line :
answered Oct 12 '17 at 15:10
YoLecomteYoLecomte
2,085218
Thanks for this. Just to note that the last line doesn't work in QGIS 3, the following works instead:QgsProject.instance().addMapLayer(temp)Credit to Abhijit Gujar.
– TeddyTedTed
Jan 3 at 12:03
@TeddyTedTed You are right, thanks for pointing this!
– YoLecomte
Jan 3 at 22:03
add a comment |
If python is Ok for you, you can easily do that with that code snippet.
Copy/paste this code in the editor of the python console, select your line layer and run the script!
layer = iface.activeLayer()
temp = QgsVectorLayer("Point?crs=epsg:2154", "result", "memory")
temp.startEditing()
attrs = layer.dataProvider().fields().toList()
temp_prov = temp.dataProvider()
temp_prov.addAttributes(attrs)
temp.updateFields()
for elem in layer.getFeatures():
feat = QgsFeature()
geom = elem.geometry().interpolate(elem.geometry().length()/2)
feat.setGeometry(geom)
feat.setAttributes(elem.attributes())
temp.addFeatures([feat])
temp.updateExtents()
temp.commitChanges()
QgsMapLayerRegistry.instance().addMapLayer(temp)
This code also take care about keeping the attributes of the line Layer.
Here is my result on a set of line :
answered Oct 12 '17 at 15:10
YoLecomteYoLecomte
2,085218
If python is Ok for you, you can easily do that with that code snippet.
Copy/paste this code in the editor of the python console, select your line layer and run the script!
layer = iface.activeLayer()
temp = QgsVectorLayer("Point?crs=epsg:2154", "result", "memory")
temp.startEditing()
attrs = layer.dataProvider().fields().toList()
temp_prov = temp.dataProvider()
temp_prov.addAttributes(attrs)
temp.updateFields()
for elem in layer.getFeatures():
feat = QgsFeature()
geom = elem.geometry().interpolate(elem.geometry().length()/2)
feat.setGeometry(geom)
feat.setAttributes(elem.attributes())
temp.addFeatures([feat])
temp.updateExtents()
temp.commitChanges()
QgsMapLayerRegistry.instance().addMapLayer(temp)
This code also take care about keeping the attributes of the line Layer.
Here is my result on a set of line :
answered Oct 12 '17 at 15:10
YoLecomteYoLecomte
2,085218
answered Oct 12 '17 at 15:10
YoLecomteYoLecomte
2,085218
answered Oct 12 '17 at 15:10
YoLecomteYoLecomte
2,085218
answered Oct 12 '17 at 15:10
YoLecomteYoLecomte
2,085218
2,085218
Thanks for this. Just to note that the last line doesn't work in QGIS 3, the following works instead:QgsProject.instance().addMapLayer(temp)Credit to Abhijit Gujar.
– TeddyTedTed
Jan 3 at 12:03
@TeddyTedTed You are right, thanks for pointing this!
– YoLecomte
Jan 3 at 22:03
add a comment |
Thanks for this. Just to note that the last line doesn't work in QGIS 3, the following works instead:QgsProject.instance().addMapLayer(temp)Credit to Abhijit Gujar.
– TeddyTedTed
Jan 3 at 12:03
@TeddyTedTed You are right, thanks for pointing this!
– YoLecomte
Jan 3 at 22:03
Thanks for this. Just to note that the last line doesn't work in QGIS 3, the following works instead:
QgsProject.instance().addMapLayer(temp) Credit to Abhijit Gujar.– TeddyTedTed
Jan 3 at 12:03
Thanks for this. Just to note that the last line doesn't work in QGIS 3, the following works instead:
QgsProject.instance().addMapLayer(temp) Credit to Abhijit Gujar.– TeddyTedTed
Jan 3 at 12:03
@TeddyTedTed You are right, thanks for pointing this!
– YoLecomte
Jan 3 at 22:03
@TeddyTedTed You are right, thanks for pointing this!
– YoLecomte
Jan 3 at 22:03
add a comment |
You can use the GDAL/OGR tool: Create points along lines.
Make sure you specify 0.5 as the distance. This calculates the fraction of the total length (not the distance) as the tool incorporates the ST_Line_Interpolate_Point function.
Here is the default settings shown for me using QGIS 2.18.2 for Win7 64-bit:
The attributes are also carried over to the output point layer.
answered Oct 12 '17 at 15:12
JosephJoseph
58.5k7100205
add a comment |
You can use the GDAL/OGR tool: Create points along lines.
Make sure you specify 0.5 as the distance. This calculates the fraction of the total length (not the distance) as the tool incorporates the ST_Line_Interpolate_Point function.
Here is the default settings shown for me using QGIS 2.18.2 for Win7 64-bit:
The attributes are also carried over to the output point layer.
answered Oct 12 '17 at 15:12
JosephJoseph
58.5k7100205
add a comment |
You can use the GDAL/OGR tool: Create points along lines.
Make sure you specify 0.5 as the distance. This calculates the fraction of the total length (not the distance) as the tool incorporates the ST_Line_Interpolate_Point function.
Here is the default settings shown for me using QGIS 2.18.2 for Win7 64-bit:
The attributes are also carried over to the output point layer.
answered Oct 12 '17 at 15:12
JosephJoseph
58.5k7100205
You can use the GDAL/OGR tool: Create points along lines.
Make sure you specify 0.5 as the distance. This calculates the fraction of the total length (not the distance) as the tool incorporates the ST_Line_Interpolate_Point function.
Here is the default settings shown for me using QGIS 2.18.2 for Win7 64-bit:
The attributes are also carried over to the output point layer.
answered Oct 12 '17 at 15:12
JosephJoseph
58.5k7100205
answered Oct 12 '17 at 15:12
JosephJoseph
58.5k7100205
answered Oct 12 '17 at 15:12
JosephJoseph
58.5k7100205
answered Oct 12 '17 at 15:12
JosephJoseph
58.5k7100205
58.5k7100205
add a comment |
add a comment |
I would suggest you use MMQGIS plugin that will allow you to find the mid point of the layer.
This provide a great resource to learn more about the plugin and the features. You would need to add the plugin via the repository in QGIS Describes use of MMQGIS, a set of Python vector map layer plugins for Quantum GIS
answered Oct 12 '17 at 15:02
whyzarwhyzar
10.7k92866
add a comment |
I would suggest you use MMQGIS plugin that will allow you to find the mid point of the layer.
This provide a great resource to learn more about the plugin and the features. You would need to add the plugin via the repository in QGIS Describes use of MMQGIS, a set of Python vector map layer plugins for Quantum GIS
answered Oct 12 '17 at 15:02
whyzarwhyzar
10.7k92866
add a comment |
I would suggest you use MMQGIS plugin that will allow you to find the mid point of the layer.
This provide a great resource to learn more about the plugin and the features. You would need to add the plugin via the repository in QGIS Describes use of MMQGIS, a set of Python vector map layer plugins for Quantum GIS
answered Oct 12 '17 at 15:02
whyzarwhyzar
10.7k92866
I would suggest you use MMQGIS plugin that will allow you to find the mid point of the layer.
This provide a great resource to learn more about the plugin and the features. You would need to add the plugin via the repository in QGIS Describes use of MMQGIS, a set of Python vector map layer plugins for Quantum GIS
answered Oct 12 '17 at 15:02
whyzarwhyzar
10.7k92866
answered Oct 12 '17 at 15:02
whyzarwhyzar
10.7k92866
answered Oct 12 '17 at 15:02
whyzarwhyzar
10.7k92866
answered Oct 12 '17 at 15:02
whyzarwhyzar
10.7k92866
10.7k92866
add a comment |
add a comment |
I use a two steps solution:
-First I make count densification with a count equals to one, this adds a mid point to every segment.
-Then I extract specific nodes, indicating node number 1.
I use this solution because I keep not only the mid point, also the angle of the segment comes as an attribute.
I have a model with the two steps inside, I only have to insert the lines layer
answered 7 mins ago
Juan Francisco Garrido RiteJuan Francisco Garrido Rite
1
New contributor
Juan Francisco Garrido Rite 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 use a two steps solution:
-First I make count densification with a count equals to one, this adds a mid point to every segment.
-Then I extract specific nodes, indicating node number 1.
I use this solution because I keep not only the mid point, also the angle of the segment comes as an attribute.
I have a model with the two steps inside, I only have to insert the lines layer
answered 7 mins ago
Juan Francisco Garrido RiteJuan Francisco Garrido Rite
1
New contributor
Juan Francisco Garrido Rite 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 use a two steps solution:
-First I make count densification with a count equals to one, this adds a mid point to every segment.
-Then I extract specific nodes, indicating node number 1.
I use this solution because I keep not only the mid point, also the angle of the segment comes as an attribute.
I have a model with the two steps inside, I only have to insert the lines layer
answered 7 mins ago
Juan Francisco Garrido RiteJuan Francisco Garrido Rite
1
New contributor
Juan Francisco Garrido Rite is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I use a two steps solution:
-First I make count densification with a count equals to one, this adds a mid point to every segment.
-Then I extract specific nodes, indicating node number 1.
I use this solution because I keep not only the mid point, also the angle of the segment comes as an attribute.
I have a model with the two steps inside, I only have to insert the lines layer
answered 7 mins ago
Juan Francisco Garrido RiteJuan Francisco Garrido Rite
1
New contributor
Juan Francisco Garrido Rite is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 7 mins ago
Juan Francisco Garrido RiteJuan Francisco Garrido Rite
1
New contributor
Juan Francisco Garrido Rite is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 7 mins ago
Juan Francisco Garrido RiteJuan Francisco Garrido Rite
1
answered 7 mins ago
Juan Francisco Garrido RiteJuan Francisco Garrido Rite
1
1
New contributor
Juan Francisco Garrido Rite is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Juan Francisco Garrido Rite is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Juan Francisco Garrido Rite 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 |
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