Linked Questions
27 questions linked to/from Finding centrelines from polygons in QGIS
16
votes
3
answers
24k
views
Creating centerline of river in QGIS? [duplicate]
I made two river bank lines and I want to associate them.
I want to make a centerline using two rows as a base. I managed to make the centre line with a lot of work creating several lines from one ...
- 161
1
vote
0
answers
223
views
Creating Centrelines from Road Polygons using QGIS? [duplicate]
I want to create center lines from road polygons.
Are there any automated tools in QGIS to do this?
I am including a Screenshot of my vector file below.
- 11
0
votes
0
answers
178
views
Is it possible to "re-buffer" river polygon dataset? [duplicate]
I've river polygon data representing the water quality. This polygon data were derived from polyline dataset according to a buffer distance in the attribute table. Unfortunately I don't have this line ...
- 1,482
0
votes
0
answers
84
views
How to extract road centreline from delaunay triangulation using open source QGIS? [duplicate]
From some months I have been solving a problem but I cannot finish. My question is, "How can I extract a road centreline from delaunay triangulation using open-source QGIS?" Actually, I am using ...
user37685
1
vote
0
answers
76
views
How to get centerline of each polygon (rectangles) in QGIS [duplicate]
How to get centerline of each polygon (rectangles) as in Figure 1 in QGIS to obtain centerlines as in Figure 2
Figure 1
Figure 2
- 537
32
votes
6
answers
46k
views
Creating Centrelines from Road Polygons/Casings using ArcGIS Desktop?
I want to create center lines from road polygons.
Are there any automated tools in ArcGIS for Desktop to do this?
I am including a Screenshot of my vector file below.
- 767
18
votes
2
answers
15k
views
Is it possible to create Thiessen polygons around nodes in QGIS?
Is it possible to create Thiessen polygons around nodes in QGIS? e.g. http://en.wikipedia.org/wiki/Voronoi_diagram
- 467
11
votes
5
answers
18k
views
Is it possible to convert Polygon to centerline linestring?
I have a Polygon which I want to convert to centerline linestring.
IMAGE 1
I used the Vector to convert to Polyline but they are not center line as under:
VECTOR TOOL
IMAGE 2
Polyline created by ...
- 463
6
votes
2
answers
7k
views
Create a center line between 2 polyline - QGIS [duplicate]
I want to create a center line for a river (polygon). I thought about simply creating a new line manually, but it would be a long and imperfect process. If there is a way to automate this process, ...
- 323
6
votes
1
answer
3k
views
Creating centerline of polygon using PostGIS?
I am aware of Finding centrelines from polygons in QGIS? but I am looking for another Open Source GIS way to do this.
Is there a possibility to create centerlines in PostGIS?
I have this shapefile (...
- 83
5
votes
1
answer
2k
views
Creating middle line between two lines in QGIS
I'm looking for a way or tool in QGIS that could create a mean line between two line features, from a line shapefile (not a polygon). See sketch image below for clarification.
- 163
3
votes
2
answers
2k
views
Creating buffer (of line geometry) around polygon feature using QGIS
I have a polygon layer representing coastal cliffs and would like to create a line at a certain distance out to sea from this polygon layer (I drew a blue line on the image below to demonstrate).
In ...
- 861
8
votes
1
answer
517
views
Opening old QGIS model in current QGIS versions
There is an older answer by @underdark to this post: Finding centrelines from polygons in QGIS?
She links a QGIS model that apparently was created in QGIS 2.12. It has the file extension .model
When I ...
- 74.9k
4
votes
1
answer
2k
views
Find out if overlaying polyline matches polygon centerline in qgis
I have a polygon and a polyline and I need to find a scientific way of how close that polyline is to the actual polygon centerline. Is there any way of doing this in qgis? Any extensions, models, ...
- 637
8
votes
2
answers
741
views
Generating non-merging buffers in QGIS
I'm using QGIS to construct some fixed width buffers from a coastline shapefile. Is there a way to easily handle overlaps/ median lines? (I'm not sure if there's a particular term or phrase I should ...
- 497