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.

Filter by
Sorted by
Tagged with
0 votes
0 answers
33 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 ...
  • 101
1 vote
0 answers
41 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 ...
1 vote
1 answer
104 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 ...
  • 13
1 vote
1 answer
43 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 ...
  • 603
1 vote
0 answers
32 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" ...
  • 381
0 votes
1 answer
18 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 ...
  • 327
0 votes
0 answers
28 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 ...
  • 1,217
1 vote
0 answers
28 views

How to calculate distance from a single point along multiple linear features

I have a discontinuous hydrographic network (line feature) for which I have used the "Points along Geometry" tool to generate points every 200m. I would like to know the distance that ...
  • 11
0 votes
1 answer
18 views

Connect two network hierarchies together automatically

I have two Networks as line shapefiles. 1 is a secondary road network and [2] is a highway network. The sources of the files are different, which is why the connection of the two is not trivial. Also, ...
  • 327
0 votes
0 answers
21 views

PgRouting Create network isn't splitting on intersections

I've started working with PgRouting, I have a custom road networks inside of a linestring geometry table. I'm currently trying to create a Network for routing, the 70% of the routes are right, but ...
0 votes
1 answer
58 views

Calculating walkable catchments from polygons

I am working in QGIS, and I would like to calculate 400 m walking catchments from a set of parks (polygons). At the moment I have: Parks Layer (polygon) Urban Grid layer, which shows publicly ...
0 votes
0 answers
72 views

Creating Water distribution network using QGIS

Is it possible to create a water distribution network from an existing LineLayer and existing PointLayer (junctions)? I want to create an distribution Network with: selected starting location; ...
1 vote
1 answer
53 views

Error running Shortest path (point to layer) in QGIS

I use QGIS 3.26 with a point and a line layer, representing cities connected by a network. Running QGIS native tool Shortest path (point to layer), I get the following error message: Feature could not ...
  • 45.1k
5 votes
3 answers
244 views

Detecting overshoot lines in road network (flyovers, over/underpasses) in PostGIS

I'd like to know a way to detect overshoot lines (such as flyovers, over/underpasses) in road network through queries in PostGIS to validate topological connections. This is a sample network: CREATE ...
  • 355
2 votes
0 answers
46 views

Detecting overshoot lines in road network (flyovers, over/underpasses) in QGIS

I need to find ways to detect overshoot lines (such as flyovers, over/underpasses) in road network to validate topological connections. I suppose there are two approaches; the one is "detecting ...
  • 355
4 votes
1 answer
84 views

Merging lines of which ends are not connected but close in PostGIS

I have a sample network as shown below. CREATE TABLE sample (id integer, geom geometry(MultiLineString, 4326)); INSERT INTO sample (id, geom) VALUES (1, ST_GeomFromText('MULTILINESTRING((136....
  • 355
-1 votes
0 answers
29 views

Simplifying road network with PostGIS [duplicate]

I am trying to simplify road network with PostGIS. The original network and desired network are illustrated below. I think I need to do the following manipulations to obtain the desired result: ...
  • 355
1 vote
0 answers
75 views

Simplifying road network with PostGIS

I am trying to simplify road network with PostGIS. The original network and processed network are illustrated below. I need to do the following manipulations: Split links which has intersection(s) ...
  • 355
0 votes
1 answer
39 views

How to extract complete information from QuickOSM

I am trying to extract information from Quick OSM about the electricity grid in my country. As a key in QuickOSM I enter power, but the information I receive is not complete. On the map I see that ...
0 votes
0 answers
21 views

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 (...
1 vote
1 answer
67 views

Road network analysis for big data

Is it possible to generate service areas from 65000 facilities? Batch processing or database analysis? A friend tried with 6000 (1/10) facilities, OpenStreetMap data (country Latvia) to calculate ...
4 votes
1 answer
104 views

Splitting line-layer with point-layer in QGIS

I have a separate layer with polylines that are merged into one object. I want to split it by a separate layers with points in QGIS. I have tried using the SAGA tool "Split Lines at Point" ...
  • 41
1 vote
0 answers
26 views

How to keep roadnetwork attributes by cutting it to a service area in QGIS?

I extracted a road network including attributes (e.g., categorization of different types of highways) using QuickOSM. My goal is to cut this original road network to a 50km drivable radius from a ...
  • 11
0 votes
1 answer
89 views

Extract a network from spatstat to graph object in igraph using R

I am looking for an efficient way to transfer a linear network (class linnet) from spatstat, e. g. library(spatstat); data('chicago'); net <- spatstat.linnet::domain.lpp(chicago) to a 'graph' ...
  • 123
4 votes
2 answers
454 views

Detecting and making all connected lines in the same direction in QGIS

I have a list of straight roads segmented which has a unique "ID". I would like to detect connected lines in the road network and make them in the same direction instead of reversing them ...
7 votes
4 answers
274 views

Generating dangle point for polyline in QGIS

How do I generate the dangle points (into shapefile or something) (blue dots in picture below) of any polyline in QGIS? These are not start/end vertices.
  • 774
1 vote
1 answer
26 views

How to calculate Beginning and End Intersections of Polylines?

I have ArcMap 10.8.2 and am working with road networks consisting of intersecting polylines. Each segment has its own ID and I would like to calculate its position relative to other segments. The ...
  • 261
3 votes
1 answer
52 views

Calculating region pair distances along network in QGIS 3.22.4

I'm currently attempting to calculate the distances between several thousand region pairs (centroids) along the Roman road network in QGIS. I want to achieve something similar to the "Shortest ...
  • 51
3 votes
0 answers
159 views

Inconsistent QNEAT3 OD matrix (m:n layers as lines) results

I am running QNEAT3 on QGIS 3.22.4-Białowieża to determine the shortest path from one location to another along a stream network, but the results are inconsistent. This is being run as part of a ...
  • 237
0 votes
0 answers
32 views

Average distance between a city's residents and bank branches

I am using QGIS. I got the banks layer from OpenStreetMap data. How can I use population density data to calculate the average distance between city's residents and bank branches in that city?
0 votes
0 answers
30 views

Polyline featureclass as water network [duplicate]

I use ArcGIS Pro. I have a polyline featureclass of a water network. I want to create polygon layer around these lines to became a coverage layer but I want that to be automated and not manual. Can ...
0 votes
2 answers
36 views

coverage layer as water network [closed]

I have polyline featureclass as water network. I want to create polygon layer around these line to became coverage layer but I want that to be automated and isn't manual.
0 votes
0 answers
45 views

Merging multiple road network shapefiles

I have created multiple connected road network shapefiles of the same extent based on a subset of point locations with the v.net connect operation. I split the point locations into 4 equal point sets ...
  • 237
1 vote
0 answers
266 views

Extract nodes and edges as road network from osm.pbf file with python

I have downloaded the israël's osm.pbf file from geofabrik. I want to extract the road network's country, which means a list of edges between two nodes ids. For a such tiny country, this list should ...
5 votes
1 answer
73 views

Counting the number of duplicated links in QGIS

I have a network in QGIS illustrated as Step 0 in the following figure: In the actual network, these three links (red, blue and green) are geometrically duplicated. (I slightly shifted them to show ...
  • 355
2 votes
0 answers
45 views

QGIS QNEAT distance matrix - wrong outputs

The data and the problem I started to use QNEAT in QGIS (after very helpful advice from user Babel, here: Average walking distance). But when I was trying to pull some nice maps out of it, I noticed ...
3 votes
1 answer
103 views

Network-based clustering with fixed-sized clusters in QGIS

I have address points connected to a network of roads that I have built using GRASS v.net.connect. I would like to cluster addresses into fixed size groups along the network. So far, I have written ...
  • 121
0 votes
0 answers
24 views

QGIS Toolbox for Loop Routes?

I am looking for a function or toolbox which allows for generating loop routes subject to constraints. It would look something like: Attribute Description Example Network Routing network OSM extract ...
  • 61
2 votes
1 answer
65 views

MultiPolygonZ to nearest line using a road network (or: how far is the next highway from a project site?)

I have a MultiPolygonZ layer of Project Sites (ca. 700 features, mostly 1 polygon per feature) and want to get the shortest distance on a road network to the nearest subset of a line layer, e.g. the ...
  • 53
4 votes
1 answer
455 views

Average walking distance [closed]

I have OSM network (or city created network, either will work just fine), then I have point layers that corresponds to buildings (or rather entrances) with the number of inhabitants and lastly a point ...
0 votes
0 answers
29 views

Finding lines that are not connected to network in QGIS [duplicate]

How can I find lines that are not connected to a network and identify "gaps" in a network? See example below:
  • 2,015
0 votes
0 answers
30 views

Converting shapefile to digraph [duplicate]

I have used '''nx.read_shp''' for converting shapefile to network, but the result I am getting is quite different from how the actual shapefile looked like.
0 votes
1 answer
24 views

Closeness weighted sDNA Analysis

I am doing sDNA processing. I'm trying a set closeness/farness centrality processes, differing the origin weights. But the results are not showing numerical differences for the MAD/MED, NQPD and other ...
1 vote
0 answers
34 views

Points to line in a river network

I'm trying to build a network from these points. I've tried points-to-path but it's not giving me the desired output. The problem is that the Node ID that comes from the shapefile is not actually in ...
2 votes
0 answers
37 views

Property from Expression in Shell Script

I am using qgis_process in a shell script (Linux) to make a buffer using a field as the distance. I can get a buffer from the shell with qgis_process run qgis:buffer INPUT=pt.shp OUTPUT=buffered.shp ...
  • 21
2 votes
1 answer
49 views

Modelling elevation in 3D link-network for sDNA in ArcMap

I have a 3D link network model (multiple grades/levels joined by vertical links) that I would like to analyze using sDNA. Since the topography is uneven, I would like to account for the terrain before ...
2 votes
1 answer
278 views

Counting nodes and edges in road network

I have a road network 'TR_ROAD' with EPSG:4283 crs and 1219 features. Based on geospatial theory, the road network is combination of nodes and edges. I am trying to count the number of nodes and ...
  • 835
0 votes
0 answers
22 views

Limitations of geometric networks in ArcMap (Cost Calculation)

I am working with a point dataset and a street network within a geographic region. This region is divided in sub-divisions for which I want to calculate single networks within their area. Every single ...
  • 37
2 votes
1 answer
70 views

Road network division and best maintenance facility location using ArcMap

I am using ArcMap. I have a national road network and I would like to divide it in several zones, so each zone would get the same amount of roads (from 150 to 250 km) - to get as equal zones as ...
0 votes
1 answer
35 views

Selecting lines forming loops (not dead ends) within network dataset using ArcMap

I am looking for a way to select and export all segments of a network dataset, which are not dead ends. One way to create dead end sections is to calculate dangles and select intersecting sections. ...
  • 37

1
2 3 4 5
11