Questions tagged [network-analysis]
The network-analysis tag has no usage guidance.
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k number and distance for automating mesh network of electric service poles
I'm using QGIS to try to make an analysis for placing electric utilities poles for the first time. I've imported building and road info from OpenStreetMap and have tried some things with nearest hub ...
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Service Area Generation using QGIS 3.22.3
I am trying to generate a service area using 62K points, located along a road centerline, allocating out a distance of 762 metres from each point.
Can you do this in QGIS?
I am only seeing single ...
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QNEAT3 OD Matrix distance incorrect?
I am currently working on calculating the distances between all pairs of NUTS-2 regions in a road network.
To accomplish this I am using the QNEAT3 plugin. It worked very efficiently and I was ...
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Simplify not working on output of Service Area (network analysis) in QGIS
I'm working on a travel-time analysis that are ment to be implemented in an online map solution. The analysis is based on road-network and a point-dataset for fire-stations. The "service area (...
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Location-allocation in ArcGIS Pro: demand point allocated to multiple facilities
I'm working on a location-allocation project in ArcGIS Pro, using the location-allocation network analysis I'm allocating my demand points to new candidate facilities next to already existing ones to ...
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Network analysis in QGIS with nodes at start and end point
I have a dataset form a national agency with a topologically correct road-network. However, I have a problem when applying network analysis within QGIS to the dataset.
I have tried both the native ...
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104
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QGIS QNEAT3 Iso-Area Polygon not creating polygon or data
I am trying to calculate distances from parks in a small part of town. I have road centerlines (MultiLineString) and park entrances (Point) and want to use QNEAT3 to create iso-areas as polygons ...
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Efficient QGIS batch network analysis Shortest Distance
I'm trying to run batch analysis on Shortest Distance (point-to-point) and I notice a single problem that makes the process inefficient:
Seems like it creates Graph every time a process in the batch ...
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111
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Automating the selection of starting points in calculation of Shortest path (point to layer) in QGIS
For a letter drop experiment in Germany, I am using QGIS Network Analysis tools to calculate the shortest distances from letter drop points to surrounding postboxes. Using the "Shortest path (...
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102
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Any way to run network analysis (Closest Facility) on QGIS without creating a huge OD matrix?
I'm trying to run a closest facility analysis project on a Linux system computer, so far the available installed GIS software are QGIS and GRASS. I usually use ArcGIS so I'm not that familiar with ...
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Generating edge table from nodes using QGIS
I generated nodes from a line road network in QGIS and uploaded them to PostgreSQL/PostGIS. I would really like to use them for network analysis and I am wondering if anyone knows if, from these ...
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Considering distance in network analysis (Gephi)
I have created a set of nodes (archaeological sites) and ties (connected via certain geographical distances), exported from QGIS. I now have an edge list with weights (distances). Gephi, however, sees ...
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140
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ArcGIS Online Routing service
I have a serious confusion understanding the link: http://sampleserver6.arcgisonline.com/arcgis/rest/services/NetworkAnalysis
This is the default format to access the routing service, but this isn't ...
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140
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Alternatives to Network Analyst in ArcGIS for utility network tracing
I have feature classes of lines (roads) and two types of point feature classes (let’s call them “sources” and “sinks”; there are many sinks for every source). For every source, I need to trace the ...
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Keep line attributes in QGIS Network Analysis - Shortest Path
I'm running a simply Shortest Path task from the Network Analysis toolbox in QGIS, but it seems that the output doesn't transfer the line attributes, only the start layer attributes. I need the road ...
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111
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Isochrones in R closing roads based on spatial overlays [closed]
I am interested in comparing isochrone maps based on different road closure scenarios. I have some polygon layers that I would use to "remove" closed roads (e.g. due to flooding). I am aware ...
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55
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Network analysis using QGIS
I have a water pipe network consisting of segments with attributes of pipe dimension, material of pipe and street location.
I need to create another network with different segments grouped by these ...
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Dividing range of territory into squares with different colors from points with accident information using QGIS [closed]
I have points with accident information and I need to divide the range of my territory into squares with different colors.
And the coloring of the square must depend on how many points (accidents) lie ...
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Shortest line network route between clusters of points and the cluster centroid
I have a point layer containing clusters of points (premises) that I have grouped using a clustering algorithm (the clusters each having their own unique ID which I have used to create convex hull ...
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pgRouting - Assigning source and target from different point layers (AOIs) for network analysis
I'm new to pgrouting and normally use ArcMap to conduct any sort of network analysis. I have created a simple shortest path network along a downloaded OS Mastermap road network using pgRouting. ...
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Counting population from grid based on travel time
I have a dataset that consists of the 125x125m grid with population count and time travel vector layers (for example, 5, 10, 15 mins by car). I'd like to mark every grid that's within the buffer range ...
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QGIS, Number of Lines through a Point (of over lapping multiline shapefile)
I am doing an irrigation system analysis, for that there are multiple overlapping lines are passing through multiple points.
one number of line means a unit volume of the system,
and point means a ...
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55
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Representing stationary elements in flow map
I have been trying to make flow maps to show social relationships between people geographically based on baptismal records. I have successfully made maps using https://anitagraser.com/2019/05/04/flow-...
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480
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Routing with several stops using QGIS
I have point layer and a network (segments) stored in a GeoPackage and using QGIS. The number of points and their ids are always different.
What I need is to get a route from first to last points but ...
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102
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Subtracting line features in QGIS
Doing network analysis in QGIS. This is where I came from:
Start situation: + 600 points with fid and 1 relevant attribute. Also road network data.
First step: ran "network tools - service area (...
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56
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Shortest path from one to many points to return path id's using QGIS
I'm trying to find the shortest path between many points (pink) and one point (light green) using a network of lines (dark green). For each path found I need the list of line id's that make that path.
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58
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Network Analysis Shortest path with original line segments as output
I've managed to batch run the shortest path algorithm and the shortest route (point to layer) in the output is perfect, except that I really need the individual attribute tables of the line segments ...
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Addresses, Geolocation and driving times
I have a list of addresses (Germany and Austria) that I
want to display on a map (easy)
from a random point on the map obtain a list of all the addresses that are within a driving time of x mins (...
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34
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Seeking library to do Spatial Network Analysis using QGIS
I am new doing network analysis out of R, I would like to know which is the best library to fulfill a spatial network analysis with Qgis?
I have been trying with Qnetwork, but I have problems by ...
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How to cluster points based on network traveling time to a common location?
I have a set of points that I need to divide into N different clusters. I know how to do this with the arithmetic distance, but in this example I need to cluster them based on the network traveling ...
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Balancing multiple supply and demand locations in QGIS
I am looking for a way to balance supply and demand with respect to distance, between two vector layers in QGIS.
I have two vector layers 50x50m grid
Supply (The red negative values)
Demand (The ...
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644
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Seeking Transit Feed (GTFS) Toolset for QGIS?
I can see that ArcGIS has a transit feed toolset that enables converting the .txt files from GTFS data directly into usable feature classes for GIS.
I am trying to develop catchment areas in the ...
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How to add additional weight to shortest path?
I am calculating shortest bath between two points. I need to add an additional feature eg. air toxicity in my calculation, so that the shortest path calculated takes into account the air toxicity and ...
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QGIS v. ArcMap Network Analysis Isochrones [closed]
I am looking at developing catchment areas based on a street-lines feature class against various bus stops to find an ideal catchment area which can then be converted and run in a simulation. The ...
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Which sensitivity analysis is most suitable on cost factors in route planner? [closed]
I am working on developing a route planner with alternative impedance/cost factor (safety of the route).
I am building the application mainly in pgRouting.
As a final step I would like to perform ...
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108
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PyQGIS3 retrieving points from a shortestpath graph
I'm upgrading some code which worked with QGIS 2.18 to now work with QGIS 3.4.5 and had the following snippet working to retrieve a set of points from a graph created by the QgsGraphBuilder function:
...
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Cumulative value/cost along shortest distance roads in QGIS
I have a road network linking multiple (ca 1830) agricultural production regions to several ports (ca 12). (lines in the pic below are roads, small black dots centroids for producing regions and ...
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608
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Batch distance calculation with v.net.distance
I have three shapefiles:
one containing destinations
the second containing postcodes
the third containing the road network
I want to calculate the distance between the postcodes and destinations ...
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134
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Dijkstra’s graph returns infinite cost in QGIS?
I borrowed some code from the Network analysis library, modified as appropriate. The goal is a program that measures the distance between a location and a train station.
Eventually, this will loop ...
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299
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Recognizing when road is uphill and when downhill using QGIS?
How do I automatically recognize and cut roads of a great network in places when the roads are changing the path uphill and downhill using QGIS?
I have a geotiff dem.
Schematic truck's transport
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269
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Line network integration analysis in QGIS
I want to analyse how integrated a line (e.g. road, stream) is within a network.
I want to perform the "integration" type of analysis identified by Javadi (not the connectivity or choice analysis) i.e....
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V.Net.Allpairs not working
I have two layers: (1) point layer (city centroids) and (2) OSM road shapefile layer. I want to know the distance to take from one city to another. I want to output a matrix like this:
from\to ...
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Speeding up sDNA analysis [closed]
I am trying to analyze several cities around the world (including major cities like London, Tokyo or Beijing) using different centrality measures with varying radiis.
The problem with this is that ...
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Calculation of fastest path with in network analysis by qgis 3.0
I have a road network (with speed limit) and different points connected to the roads. I would like to measure the distance between several points along the roads. Basically I want to do shortest path ...
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Checking all 100 km routes through network for proximity to facilities?
I am only interested in software agnostic answers to this question.
We're making a coverage analysis where we need to find out which sections of a road network are covered by EV charging ...
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Network analysis: shortest path to 'visit' all polygons
I'm totally new to QGIS but I really like it and would like to solve something more elaborated. I found a lot of threads and tutorials about how to solve the traveling salesman problem with QGIS but ...
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250
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QGIS Network analysis/routing module
in QGIS I have to draw a scheme ( kind of CAD) that represents electrical circuits.
The scheme consists of points and lines elements, with alphanumeric attributes associated.
The starting point and ...
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269
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QGIS network analysis, points on graph cannot be reached
Using QGIS 2.18.14, I try something around with qgis.networkanalysis module as described here: https://docs.qgis.org/2.18/en/docs/pyqgis_developer_cookbook/network_analysis.html
director = ...
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740
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Calculate distance matrix based on network
I have the following layers in QGIS:
origins points
destination points
a layer of lines that is the route
I want to calculate the matrix with the distance from origin to destination using Network ...
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692
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Dividing NetLogo world into two parts
I'm working with NetLogo now and I have to divide my 'world' into two parts. As you can see in the picture, my world is already divided into two parts by the river. However, my turtles still cross the ...
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