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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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: ...
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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
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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) %>...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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Streets in Network for Service Area's won't connect
I'm trying to build Service Area's with OpenStreetMap Data downloaded as .shp.zip from Geofabrik (Hessen/Germany). But for some reason some streets won't connect while most do.
Workflow:
Unzip shp....
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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....
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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 ...
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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 ...
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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 ...
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QGIS Group Policy Installation
I have read this question from 2021 but was wondering if anyone had tried since then to deploy QGIS across an organisation and what worked?
Ideally I would like to use Group Policy Management to ...
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Create OSM Network Dataset fails on Extracting Turn Restrictions [duplicate]
I am trying to create a Network Dataset from OSM Data with ArcMap (10.8.2) and the ESRI OpenStreetMap-Toolbox.
The first part of loading an OSM file I got from exporting a small portion of the map for ...
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Extract an Origin-Destination shortest paths shapefile
I have a question about QGIS (or Arcmap); I can't find an exact equivalent in the other questions.
For a project, I need to extract the network of shortest paths between each pair in a set of 300 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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" ...
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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 ...
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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 ...
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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 ...
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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, ...
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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 ...
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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 ...
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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;
...
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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 ...
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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 ...
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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....
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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:
...
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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) ...
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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 ...
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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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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 ...
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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" ...
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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 ...
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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' ...
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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 ...
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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.
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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 ...
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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 ...
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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 ...
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