Questions tagged [network-analysis]
analysis of general networks using graph theory.
97 questions
1 vote
1 answer
41 views
Network analysis for several points in QGIS
I have one line layer representing my road network and two point layers representing start- and goal coordinates, each with an index so each start point has one end point. Using the geometry generator,...
- 23
4 votes
1 answer
372 views
Generating realistic centerlines from road polygons without getting all the small side branches
I’m working on creating a road network (centerlines) from road polygons. (see the image below) The general workflow works fine, but I keep getting tiny side branches whenever a road becomes wider or ...
- 49
3 votes
0 answers
85 views
Merging several network analysis layers in ArcGIS Pro
I have done 10 network analyses (service area layers) in ArcGIS Pro. They all show the walking time of 5, 10 and 15 minutes to different services types (ex stores, schools and health care). Now I want ...
- 31
0 votes
0 answers
30 views
ArcGIS Maps SDK for .NET MAUI Routing - FindBestSequence not working
Below is my code. When I try to solve route using routeParams.FindBestSequence set to true it doesn't reorder the stops and I get a less than optimal route. I get no errors or any sort of messages ...
- 1
3 votes
3 answers
176 views
Dissolving on ID but keeping the minimum value of alternatives in QGIS
I have the result of a network analysis (using the QNEAT3 plugin tool 'OD Matrix from Layers to Lines (m:n)') showing the shortest paths from set points, via the network, to multiple end points. This ...
- 31
2 votes
1 answer
584 views
No attribute 'collections' when using Iso Area As Polygons From Point or Layer in QGIS QNEAT3
I'm trying to run the Iso Area As Polygons using the QNEAT3 plugin and neither tool works for point or layer. Using the same input I can get Iso Area As interpolation to work. Network layer is in the ...
- 51
0 votes
1 answer
162 views
How to make Network Analysis recognize my self-created streets using QGIS
I downloaded an OSM street shapefile, ran a network analysis and it works fine. Then I noticed some streets were missing, so I added them to the layer. I filled in all the attributes and also gathered ...
0 votes
0 answers
52 views
Slope as cost in OS data using QNEAT3
I'm trying to map 10-minute pedestrian walking iso-areas from a set of points using QNEAT3 and the OS multi-modal routing network dataset. The terrain is very hilly and I want to make sure that the ...
- 23
0 votes
0 answers
54 views
Extract a hierarchical topology from stream network
A typical stream network has a hierarchical topology that resembles a cladogram (phylogenetic tree). There are many software tools that have been developed to analyze variables along a cladogram, ...
- 9
0 votes
0 answers
86 views
Create an i graph object with sf objects using the i graph package in R to perform a network analysis
I would like to create an i graph object out of two sf objects. The first one includes the edges represented by polylines, in that case rivers. The second one includes vertices that lie on the river ...
- 35
1 vote
0 answers
48 views
QGIS Network analysis: Consideration of heights
I want to calculate isochrones in QGIS from a location X (for example, a catchment area of 900 metres). We use our own dataset of footpaths for this. So far, this has worked very well with the network ...
- 11
0 votes
0 answers
83 views
Shortest path for multiple points from line layer (optimized path)
I am using QGIS. I have a set of starting points (blue & red points), and I also have a vector line layer (green line). I need to find the shortest path from starting point (blue & red points) ...
- 61
2 votes
1 answer
479 views
How to create a boundary automatically around points
I created origin-destination networks in ArcGIS Pro manually using the HOW TO Create connection lines between points and a line in ArcGIS Pro tutorial. Green point is the origin and brown point is the ...
- 47
1 vote
1 answer
124 views
How to select lines/edges that overlap with a line layer in QGIS
I am calculating the shortest path in QGIS using the openrouteservice API. From the returned route, I would like to calculate the length of segments that are paved and those that are not paved. Since ...
1 vote
1 answer
429 views
How to programmatically access Trace network layer results when using NETWORK_LAYERS result type in a stand-alone Python script?
I have a stand-alone Python script that runs a Connected Trace on a Trace Network. This is a re-write of an existing script that runs a trace on a Geometric Network. The script will be published as ...
- 1,135