Linked Questions

2
votes
0answers
48 views

Merging sections of lines with same geometry in QGIS? [duplicate]

I have a series of bus routes with the frequency/hour attached in QGIS. The idea is to combine the frequencies on routes with more than one bus to have an overall bus frequency for the sections of ...
8
votes
2answers
3k views

How to sum up values of overlapping polygons in QGIS?

I have large single layers with many features overlapping. Simplified example with 50% transparency: Where the features overlap I want the attributes added together. I manually created the output ...
4
votes
3answers
11k views

Merging attribute and geometric features in QGIS?

I have polygons shapefile in which some of the polygons have same attributes as seen below:- In QGIS, how do I merge the polygons having the same attributes into one polygon? In other words, am ...
8
votes
2answers
3k views

Changing line width by classification in QGIS

I am using QGIS 2.18.18 I have a map of rivers and I want to style them based on their width. I have width as an attribute of the rivers layer. Just as we can style colors by category or graduated ...
5
votes
1answer
3k views

Merging lines (with and with no overlaps) in QGIS

I have two layers ("Layer_1" and "Layer_2") of lines where they sometimes overlap and follow each other for a bit and then takes another route (see the image below). "Layer_1": Red line "Layer_2": ...
4
votes
2answers
406 views

Display lines which share segments by offsetting them only where they overlap?

Background: As part of a route selection process I have multiple route options which often share segments. I need to keep the underlying data correct while displaying all routes in a way that they ...
5
votes
1answer
226 views

Blend differing line thicknesses in QGIS?

I'm mapping traffic flow along a series of roads (links), styling the line thickness to reflect traffic flow. Along the same road (adjoining links), traffic flow can differ, as other roads feed ...
4
votes
1answer
223 views

Calculating overlap of several lines in QGIS

I've traced several lines that represent people's paths. Some of these lines overlap several times. I would like to get a view showing for each segment of my lines the number of line overlaps. The ...
2
votes
1answer
215 views

Controlling line width at different points in QGIS [closed]

I have vector data for rivers including their width at various points. From what I have seen so far, QGIS 3.8 can set the line width only per linestring, no per segment. Is it possible (maybe with a ...
3
votes
1answer
196 views

QGIS Line width transition

I have a shapelayer with lines (streets), each line has a value for the traffic on it. The value is shown by the width of each line. Now I want to smooth the transition between one segment that has e....