Questions tagged [network]

An interconnected set of points and lines that represent possible routes from one location to another, OR in computing, a group of computers connected in order to share software, data, and peripheral devices, as in a local or wide area network.

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Set random points within a given distance of a known street network [closed]

I have a street network with a known ditance of 39735 km. Now my goal is to set a point every 200 km on this street network, so that there will be exactly 198 points generated. The distance of 200 km ...
Sebastian's user avatar
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Computing network kernel density estimate with Python

I'm using Python to do a project that requires me getting a network-based kernel density estimate to find areas with the densest concentration of car crashes. I have a road and car crash shapefile ...
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Selecting roads covered by point features QGIS

I have a layer consisting of roads and another layer of point features (traffic signs). Is there a way in QGIS to choose the area that the traffic signs cover? By this I mean the area within multiple ...
pe5's user avatar
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1 vote
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SQLite/GeoPackage over a network [closed]

In our organisation we work with data stored on an Azure network file server - pretty typical for an office. We use QGIS to read geodata files (SQLite/GeoPackage) across this network and it seems to ...
Mr_Robinini's user avatar
2 votes
1 answer
43 views

Including length when making a networkx network from a geodataframe

I'm a noob when it comes to networkx module. I have a line feature as a geodataframe that looks like this: Using momepy, I can convert this geodataframe to a network on network x: G = momepy....
Lord_Verulam's user avatar
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ArcGIS Pro - routing, remove short network elements and reconnect edges

I am setting up an ArcGIS Pro network for use in Network Analyst. So far things work pretty well, depart from some 1600 errors due to this kind of problem: " SourceName: linknetz, ObjectID: ...
robert tuw's user avatar
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73 views

Traveling salesman problem with start node and end node

I am having some trouble with finding an easy way to find the most optimum (shortest) route between four or so points without returning to the original one while following the path shown (red lines). ...
CarloseNew's user avatar
1 vote
1 answer
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Finding distance bettween all connected points (intersections) in a network (on a line) without k-nearest

I am quite new to QGIS so I was wondering whether it is possible to find the distance between all points in a network, such that the distance between each one is determined by whether they are ...
CarloseNew's user avatar
4 votes
1 answer
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fttx network design in QGIS: how to calculate distance to network backbone or another connected node, whichever is closer

I have a KML file of a fiber regional network (covers 2 US States) and a geocoded list of ~500 building addresses (nodes). I'd like to calculate two numbers for every address: The distance back to ...
fttx16's user avatar
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7 votes
1 answer
115 views

Automatically extend lines to node in QGIS

Problem: In QGIS I would like to automatically "connect" several lines to a node that is close to them by extending the lines. The objective is that the coordinates of the vertex of the ...
Julian's user avatar
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Extracting street space polygons from a pedestrian network with separate sidewalk geometries using QGIS/PyQGIS

I have a network of sidewalk geometries including crossings extracted from OpenStreetMap (OSM; here: a part of Neukölln district in Berlin, Germany) using overpass turbo (as of today, some gaps still ...
winnewoerp's user avatar
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For each segment in a polyline, I need to calculate the sum of an attribute for all objects upstream [closed]

I have a river network in polyline format and I want to accumulate an attribute in the direction of flow. For every single polyline object (stretch of river), I’d like to calculate the sum of an ...
Ben_123's user avatar
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Moving points along road line to generate start and end points 200 meters on either side of original point using ArcGIS Pro

I tried to keep it succinct in the title, but here is basically what I'm trying to do (I eventually need to script this using Python): Generate a start point 200m in one direction from the bridge ...
userfriendly's user avatar
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1 answer
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Installing QGIS on network drive [closed]

Is it possible to save the QGIS installater file (QGIS-OSGeo4W-3.28.9-1.msi) on a network drive so that several users who have mapped the server can open and use QGIS? I am having problems installing ...
Mabignix's user avatar
1 vote
1 answer
86 views

Creating automatically shortest way network between given point objects via OSM roads (without overlaying line objects) in QGIS

I am trying to automatically generate a grid between point objects (buildings). The grid should be automatically laid over public roads. So far I use the QGIS Processing Tool "Shortest way (...
Daniel's user avatar
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1 vote
1 answer
265 views

Calculating distance between point and polygon in network in QGIS [closed]

I have a 100x100m hexagon grid (polygons) and a point layer with football fields. I would like to calculate the "walking" distance (aka distance using the actual network, not straight line ...
Selma's user avatar
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How to map a stream that flows through a paddy field without a proper channel

I'm mapping a stream in Kerala (India) and found out that a stream flows onto a paddy field and flows through it. At the end of the field it again becomes a proper stream. How can I map it in the ...
Asj's user avatar
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1 answer
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Working with tbl_graphs using R

I am working with the R programming language. Based on a shapefile, I am trying to find out the driving distance between two coordinates (e.g. CN Tower and Toronto Pearson Airport). First I loaded the ...
stats_noob's user avatar
6 votes
2 answers
127 views

Identifying direct neighbours connected by network in QGIS

I have a point layer of settlements and a LineString layer of a road network. The settlements have been snapped to the network so they are directly connected by it. Settlements are not always at the ...
Will's user avatar
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Synchronisation issue

I try to synchronise my project with QFieldCloud, but a network error occurs [QF/permission_denied_plan_insufficient] Permission denied because the useraccount’s plan is insufficient]. It worked ...
Tiphaine's user avatar
2 votes
0 answers
25 views

How to dissolve links and split by other links

I am trying to aggregate road network segments by intersection using QGIS. The blue route consists of 1000 links, and I want to aggregate this route into two segments. Ex: first and second segments ...
eun lee's user avatar
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2 votes
0 answers
59 views

Solving the Knapsack Problem with a road network on QGIS

I have a road network with weights assigned based on building density (i.e., how many buildings consider a given road segment the closest road). E.g., in the image below red indicates road segments ...
Nandula's user avatar
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Setting a Starting Point from Point Shape in Graphical Modeler QGIS

I want to use a point Layer with 1 point as the input for the network-analysis in the graphical modeler of QGIS. I tried extracting coordinates from geometry and lots of stuff in the field calculator ...
soeren's user avatar
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Measuring distance from coast along stream network

I have a stream network I am using to make a suitability model for a species. One of the factors I want to consider is distance from a given point to the coast, so I'm hoping to find a way to create a ...
Young's user avatar
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22 views

How to fill automatically points touching line layer in the attribute table? [duplicate]

I am trying to build a basic road transport network using QGIS, at this stage: one layer for nodes (nodes are dots connecting lines, one node connects two lines) and one for links (a link is a road, ...
Theyyam's user avatar
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62 views

Learning How to Use Road Network Files

I am interested in learning how to work with Road Network Files in R. For example, I would be interested in finding out the driving distance between the following two (Canadian) addresses: CN Tower: ...
stats_noob's user avatar
3 votes
1 answer
133 views

Calculating distance between two closest points on graph in QGIS

I have a graph layer and a point layer. The points are snapped to the graph. I want to get the distance between the closest points on the graph
barney stinson 2's user avatar
1 vote
0 answers
168 views

Grouping sf object by one variable using R

I have this code which allow me to calculate the distance of sfc_POINT along a sfc_LINESTRING library(dplyr) library(units) library(sf) library(sfnetworks) distances <- net %>% group_by(I) %>...
C. Guff's user avatar
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81 views

Measure size of largest connected component in QGIS

I'm doing network analysis to measure robustness against disruption through largest connected component. Currently I only have two types of file which consist of road segment and road junction. I know ...
Louisa's user avatar
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3 votes
1 answer
52 views

Cutsom ST_Multisplit function returning more than one split line. How to only return one line split at various points?

I Have a modified version of the function from How to ST_Split features in one table by features in another? CREATE OR REPLACE FUNCTION ST_Multi Split(geom Geometry, blades Geometry) RETURNS Geometry ...
Ian23's user avatar
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1 vote
0 answers
46 views

Identifying all polygons connected by major river/stream

I'm using ArcGIS Pro. I have a rivers (line) dataset, and a census tract (polygon) dataset. My goal seems relatively simple--polygons are considered "contiguous" if they are connected via a ...
Ashley's user avatar
  • 315
2 votes
0 answers
44 views

Calculate network distance from point layer to Hub layer in QGIS

I have a river network layer, a layer of 360 sampling sites and a layer of 700 facilities. I want to calculate the network distance only between sampling sites and facilities but between all sites and ...
Daniel97's user avatar
2 votes
1 answer
100 views

How to put the end points with the same rows as the start points using shortest path tool on network roads - QGIS?

I have 2 point layers containing XY in qgis and I'm trying to get the shortest paths between each rows along a given network (row1 in first layer to row1 in second layer and so on). I used this ...
adi schneider's user avatar
3 votes
1 answer
404 views

QGIS OpenRouteService plugin: using OpenRouteService run in Docker rather than the ORS main API

So I am trying use the OpenRouteService plugin in QGIS to calculate the drive times and distances between two sets of points. However the size of my file exceeds the allowed data usage of the ...
Ian Moffit's user avatar
3 votes
1 answer
120 views

QGIS actions with remote data

I try to share several images through an action from QGIS. The images are in my PC and I need that other users can see them in their machines (we are in a local network). The images are geotagged in ...
Oscar Soto's user avatar
1 vote
1 answer
487 views

Connect unconnected networks in QGIS

I have a network project in QGIS: Where arcs is a LineString layer, but all the arcs must be connected. I was able to detect subnetworks using the Disconnected Islands plugin which populates a ...
Gabriel De Luca's user avatar
2 votes
1 answer
186 views

QGIS 3 - Snap line feature endpoints within certain tolerance to other line features

I have a line layer in QGIS 3.22.12 with which I want to create a network. However I've found quite a few lines where the endpoint does not quite intersect with another line. Is it possible to clean ...
Sean Jarrett's user avatar
0 votes
0 answers
167 views

How to remove remove self-intersections(?) from a river network line

I am working with a new global-scale river network that splits around large islands (blue lines). I will be working with the river network in Google Earth Engine and have completed some prior vector ...
Rich_B's user avatar
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2 votes
0 answers
99 views

Sequential drawing of lines and points

It is required to draw different geometry types alternately. Like this: point - line - point - line - point - ... Is there any way in QGIS that provides users with such features: drawing objects of ...
ordinary user's user avatar
1 vote
1 answer
40 views

Name arcs and nodes of a network of roads using only roads names

I have a network of roads composed of arcs (segment of road connecting two intersections) and nodes (intersection of two or more roads). Each road, which is composed of one or more arcs has a name (e....
Michele Cordini's user avatar
0 votes
1 answer
139 views

Error using Grass v.net.centrality

I have a network downloaded from Open Street Maps on which I want to run the Grass v.net.centrality tool. I've tried everything I can think of, including reinstalling QGIS (I've tried multiple ...
John Silva's user avatar
1 vote
0 answers
68 views

pgr_nodeNetwork doesnt put nodes on every intersection

I used the osmnx python package to get OSM roads network. I intended to use pgr_createTopology to have a correct network in order to use other pgrounting functions. However my data from osm is not ...
Busu's user avatar
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94 views

How to use network analysis (shortest path, point to point) on multiple points [QGIS 3.16.8-Hannover]

I have a project with 4 layers, two point layers with multiple destination points, another layer with a few starting points and a layer 'roads' that have routes from the starting points to each ...
Ghostwriter84's user avatar
0 votes
0 answers
159 views

Service Area with lines and polygons as starting point

I have a file with schools and kindergartens represented as points and a network line file. I'm using the QGIS 3.22 Network Analysis 'Service Area from Layer' tool to create a line output which ...
Lilly's user avatar
  • 101
1 vote
0 answers
93 views

Delete parallel lines to calculate total network length [closed]

I have problem with parallel lines in QGIS. I want to delete lines, which have common courses with others (expample of lines is in the picture below) . Context: The lines are network-lines and to ...
user_998's user avatar
1 vote
1 answer
622 views

Calculation of the distance between intersecting lines, but according to existing lines

I will try to briefly describe, namely, it is a forest area and polygons mark some kind of reference area, roads are lines, and there are also tractor roads (the same lines) which in this case are the ...
sttipa's user avatar
  • 95
1 vote
1 answer
175 views

Trace/clip a segment of a line using a point layer

I have a set of points as well as a line layer (a road network) as given below. After I snap the points to the line layer the result is as follows. The result that I need is to clip/trace the line ...
Nandula's user avatar
  • 781
1 vote
0 answers
295 views

QGIS Geometry Generator make_line using road network

I want in QGIS 3.22 Geometry Generator to connect related points with a line, but the line must go between the points along the shortest network of paths. I have two layers: one is "points" ...
Rii Pii's user avatar
  • 411
0 votes
1 answer
65 views

Creating 3D representation of line shapefile using ArcGIS

I have a line shapefile of links that build a network. Now I'd like to assign each node (or every end of a line segment) a z-value depending on a certain attribute. Is it possible to then display this ...
Yves's user avatar
  • 326
0 votes
0 answers
161 views

Create single polyline from a road network

I often need to create KML with a single polyline in order to organize bicycle riding group activities, sharing the KML so that every rider has the right path for that activity. I usually trace the ...
heltonbiker's user avatar
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