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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3
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0answers
93 views

To find distance in QGIS

I'm looking for a solution in QGIS for: the distance measurements from each and every cell site (blue point) back to the Exchange(point) that they are connected with. We need to take the shortest path ...
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42 views

Seeking dataset which contains traffic and path network?

I'm looking to purchase a road network (e.g ITN), preferably with a traffic dataset (such as ESRI Streetmap). I don't know if the road networks with integrated traffic can be joined with path networks ...
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1answer
59 views

Assigning accumulating numbers to events along a (river)network

I have a river network along which there are lake polygons that I want to assign orders to. So from headwaters to downstream I want the order to increase depending on the number of previous lakes. As ...
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1answer
578 views

QGIS Least Cost Distance Points to Destinations via Roads

I have a layer of starting points (people's residences) and a layer of destination points (stores). I also have a roads layer with a cost field calculated from distance and speed of each segment. ...
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0answers
124 views

Modifying ArcGIS Network Analyst route when route created is flawed?

I'm analyzing an optimized routes for garbage collection. There are roughly 250 orders per route. I've ran the Network Analyst tool both with time and length impedances. In both cases, the output ...
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1answer
50 views

Road Network with 4th & 5th road level (small agriculture roads & footpaths)

I have a need to use 4th & 5th level roads (small agriculture roads & footpaths) for Germany and the only provider I could find is the Logiball. Is anybody aware of another provider?
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2answers
6k views

Is there an optimal algorithm to find the longest shortest path in a network?

I have a large set of linear networks and I would like to find the two ends of each network that are the most distant from each other along the network (on the image below, it would be D to K). The ...
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0answers
10 views

Network Dataset connecting link file - no links

I've produced a network from ITN and Urban Paths data, and both sets of data work separately, however you cannot route between the paths and the road network because no connecting links were created. ...
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1answer
408 views

How to obtain a network completely connected in QGIS?

I have a vector of lines, in which some of them are isolated from the rest of the lines, but I need that every line is connected to at least another one, so as to obtain a unique connected path. ...
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1answer
63 views

How to split a network of polylines and then extract vertices without having overlapping lines?

I tried to split polylines with GRASS or QGIS tools but I obtain always a layer with overlapping lines. I figured it out because I always make a spatial join between the splitted lines and the nodes ...
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1answer
726 views

Calculating distance for each point along line in ArcGIS Desktop? [duplicate]

I have a polyline(Roads network) and points(Nodes) recorded along the line. I would like to calculate the distance for each point along the line in ArcGIS 10.1. Result will added in a new column and ...
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1answer
206 views

Need to calculate distance (Node to Node) along the lines [closed]

I have a Shapefile (polygon), I need to calculate distance (Node to Node) along the lines in map unit(meter or kilometer). I want to do it in ArcGIS.
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1answer
46 views

Split a network according to a vector of nodes

I would like to split a network of roads at the vertices just created in another layer. So, I have got a roads layer and a nodes layer and I would like to exploit the nodes layer in order to obtain a ...
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1answer
823 views

Road design using Least cost path by longitudinal slope in ArcGIS Desktop?

I have previously asked for help regarding this issue Finding least cost path in QGIS?, but obviously people do not know exactly the problem related to road design I used the least cost path, this ...
2
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1answer
781 views

Making graph from network vector in QGIS?

I have a network of roads and I would like to obtain a graph made by edges, each of them delimited by a origin node and a end node, such as the picture shows. I would like to obtain a table made of ...
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1answer
227 views

QGIS crash when looping through features in network analysis (dijkstra)

My script to compute distance in my network works. Now I want to loop over all features of a point layer to produce multiple distance calculations. Just iterating over the features work of course and ...
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2answers
560 views

Properter to get travel time as cost for network analysis

What I want to do is calculate travel times between points within a road network. I know there are options with GRASS (via v.net) and pgRouting (and possibly many more). I intent to stick to the ...
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0answers
75 views

Saving X, Y coordinates of nodes

I have to manage a network, made by essentially the streets of a city which has to serve some buildings. I used GRASS v.clean to clean the network and then v.net.nodes to make nodes and then I save ...
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0answers
131 views

Resources for creating a matrix of relationships between street segments

We are looking at examining traffic in a city using data coded to TMCs (which are long directional links, primarily major arterials and highways, where each link is the length of multiple blocks). In ...
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1answer
477 views

New Network Dataset Error: “There are no feature classes in the network container that can be added as feature sources”

I have three feature classes in a database: a line feature class with roads, a point feature class with road intersections, and another point feature class that I would like to use as starting points ...
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29 views

Connecting points via network layer? [closed]

I have a set of points which are bus stops in a network separately. I also have a layer of road network. These bus stop points and the nodes of the network perfectly match so there is no need for ...
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0answers
682 views

postgis connection timeout in qgis

When I connect to my postgis database and edit/add features and keep the edit mode open, many times it loses the connection. I cannot save my new/edited features and I need to restart the software ...
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2answers
3k views

Drawing lines between all possible combinations of points using ArcGIS Desktop?

I have a shapefile with several points (A, B, C, D, E,...) and I want to draw a line between all possible combinations of points (A-B, A-C, A-D, B-C, B-D,...). As I know that it is quite simple in ...
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2answers
823 views

Using pgr_withPointsCost from pgrouting 2.2.2

I'm trying to calculate the cost of travelling in a network from one point to many points (adresses). To increase the precision of the analysis i want to use the function pgr_withPointsCost as it (as ...
3
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1answer
927 views

How to get lines and nodes around the confluence point in a network system (line shapefile)?

I got a network line shapefile and the figure below was part of it. I want to do task around confluence point, so I took photo around confluence point as figure below. I want to get line segments (...
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54 views

Generating random networks of a specific area in ArcGIS

I want to compare the richness of mammals between an implemented biological corridor that connects two patches of forest, against a random generated network connecting these same patches. For this ...
2
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1answer
1k views

Polyline matching python

I have two polylines, the first consists of individual GPS traces and the second is a series of road network poylines. I wish to match the GPS trace polyline to that of a road network polyline or ...
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1answer
3k views

Sample code to plan a trip using OpenTripPlanner as a jar dependency

I would like to use OpenTripPlanner as a jar dependency in my project and do some routing with it. I have followed the steps at https://github.com/opentripplanner/OpenTripPlanner/blob/master/src/test/...
4
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1answer
2k views

point to point distances along road network

I have 2 different point layers that I want to use as origins (Company offices) and a separate layer with 500+ points in it (Client Stores) I also have a road network layer. For each of the 500+ ...
2
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1answer
443 views

How to build a shortest spanning trees that respects existing connections using QGIS?

I have a) a point layer of connection points to an existing network, i.e. an existing network can be accessed here. b) a point layer of sites that should be connected newly to the existing network ...
10
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1answer
928 views

How to compute areas of influence in QGIS?

I am trying to create a polygon layer showing polygons that correspond to a closest store. For a set of 30 store locations, the result should be a polygon layer with 30 features, one for each store. ...
3
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1answer
583 views

How to measure distance along a line from a specific point

I have shapefiles of a road network and five points. What I would like to do is measure the distance from each point along the road network using QGIS, but am struggling to achieve this. So far, I ...
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1answer
32 views

Creating new layer in order to fix duplicate categories in GRASS?

I'm trying to run a network analysis in Grass 7.0 following this tutorial: http://www.ing.unitn.it/~grass/docs/tutorial_641_en/htdocs/esercitazione/network_analysis/node3.html Since I'm new to Grass ...
7
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2answers
2k views

distance matrix with a linear feature

I would like to use the distance matrix tool (or a similar function) to look at distances between sites (displayed as point data) and large rivers (displayed as linear). I have been following this ...
2
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1answer
492 views

Road Graph in QGIS

I am learning transport related analysis in QGIS. While using Road Graph (Shortest Path), after giving the specifications, the shortest path panel is not being displayed. Could some one help?
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1answer
241 views

Joining attributes of two line feature classes (street network, ArcGIS)

I have two line feature classes for a street network. Their geometries are only crudely similar, while their attributes are different. I am trying to add the attributes of one feature class to the ...
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0answers
28 views

Transferring Interpolated Results to Line Features

I am using ArcDesktop 10.3. I have a road network feature dataset and a point city feature class. Using Network Analyst and Closest Facility along with several incident points, I solved several ...
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2answers
710 views

Switch QGIS proxy settings programatically

I am using QGIS at two offices with different proxy-servers. At the moment I have to change the proxy settings manually every time i switch the office. I was wondering if its possible to change the ...
2
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1answer
106 views

flag problem in network trace in arcmap

i want to trace using a weight filter but we i have the case, that 2 edges are overlapping and they share the same 2 junctions. Now if you want to set a flag, you won't be asked if you want to select ...
2
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0answers
70 views

Finding vectors with wrong direction in river network

I have a shapefile containing network of rivers for the whole country. The description of the layer is saying that orientation of the vector should be the same as the river flow. This is true for most ...
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1answer
1k views

How can I get QGIS Plugins to work through the proxy internet settings?

For QGIS on my work computer, I add in the appropriate information under Settings - Network - Proxy. This allows me to access plugin repositories, but sometimes plugins do not work. I would get '...
2
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1answer
163 views

How to solve “features were not reachable” warning message using v.net.distance in GRASS

I'm using GRASS 7.0.4 under Linuxmint 17.1 KDE. I need to build a raster with the shortest distance from every pixel to a city following a road. I have two shape files, the city (point) and the road (...
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1answer
353 views

Constructing a weighted graph a.k.a. a road network with distances for a specific area

Pardon my ignorance in GIS/Routing tools as I'm new to it: I have a map in OSM format and wanted to build a routable graph out of it ( to experiment a searching algorithm I have in my PhD thesis). ...
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0answers
288 views

USA Road Network Data Set Options?

I need a contiguous, nationwide USA Road Network with speed limits, distances, etc. I have been using TIGER but the challenge is at state boundaries - where contiguous road segments are split. Is ...
2
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2answers
1k views

ArcGIS 10.3: How to merge lines divided by junction points?

I have one shapefile with train stations (points) from a region in the UK and another shapefile with railroad tracks (lines) between these stations. Problem is, in the latter I don't have a unique ...
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1answer
1k views

Selecting parallel line segments but not segments that intersect

I have 2 different shapefiles that each have railroad track on them. Most of the track being displayed is the same, but since it is coming from 2 different sources, the physical lines themselves are ...
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1answer
255 views

Problem when building network with spatialite-gui

I would like to find the shortest path between two points in the following graph and corresponding table: I am using spatialite-gui for windows version 1.2.1 and I am having a problem when building ...
4
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1answer
673 views

Create an Origin - Destination map using roadnetwork layer

I am using Qgis 2.14.2, I am trying to create a O-D using the road network that I have in a feature. Is any way or plugin that can help me to plot 500 trips using as a path my road network layer? I ...
2
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0answers
99 views

QGIS Broken Link to files on a server

My colleagues and I are using different versions of QGIS (2.8.2, 2.86 & 2.14) on windows 8.1 and Windows 10. When we open existing projects we get a "Handle Bad Layers" box coming up. We have ...
2
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1answer
1k views

Looking for an algorithm to quickly find the closest point on a road network (or other graph)

I am looking for a fast algorithm that will find the closest point on a line segment in a graph (such as a road network) to my test point. I'll try to be more specific. I have a road network graph. ...

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