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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1answer
98 views

Why does IDatasetContainer2.CreateDataset fail with ArcObjects at ArcGIS 10.1?

I have a small application used to check and generate network, created with the help of the following tutorial: http://help.arcgis.com/en/sdk/10.0/a...00000w7000000/ It worked just fine with ArcGIS ...
2
votes
1answer
77 views

Clipping a buffer from network analyst shapefile to a base shapefile

I have exported my polygon shapefile which I got after I ran my Network Analyst into a shapefile. It has 6 buffer zones (delimited by time in increments of 10 minutes). When I check the attribute ...
2
votes
1answer
502 views

How to join nodes to network lines ( and not the other points)

I'm trying to do a shortest path analysis on my network. In order to prepare the network and attach polygon centroids to the roads, I used GRASS' V.NET operation=connect. the problem with this ...
2
votes
3answers
368 views

How to route railcars along railroads?

I'm very new to the world of GIS, but I'm learning a great deal from this site, as well as others. I fell like this should be 'easy' but I need to be pointed in the right direction. I'm trying to ...
2
votes
2answers
108 views

How do I create a network from connected links

I have a bundle of links in 'some' networks. I need to find out which ones are connected to each other i.e. I need to find out which links are not connected to the 'main' network. I have been working ...
2
votes
1answer
513 views

Creating routable network table in PostGIS

I am trying to create the routable network table, as per http://underdark.wordpress.com/2011/02/07/a-beginners-guide-to-pgrouting/. Everytime I do it in PostGIS extension, QGIS crashes. The area is no ...
2
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1answer
268 views

Visualizing KMZ network link in QGIS

Is it possible to open and visualize and kmz network link in QGIS. If so what are the setps involved? Thanks in advance Cheers
2
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1answer
514 views

How to integrate every single street into a network analysis?

This is my first question, but I solved problems before thanks to this great community! It is also my first time working with a network analysis (ArcMap 10) and there are some problems which haven't ...
2
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1answer
320 views

Need to programmatically create Barriers in my Network Dataset

I have the following C# code to create a Network Dataset layer that I can bring into ArcMap. However, even though I am able to create a Route from the ND, I am not able to create Barriers of any kind ...
2
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0answers
22 views

Can GRASS compute the line graph representation of an input graph?

I'm interested in computing a line graph for an input graph, preferably in GRASS since I'll be using other GRASS network analysis tools afterwards. I couldn't find any reference to line graphs in the ...
2
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0answers
87 views

How to build a GRASS network with node IDs from the line dataset?

I have a dataset of street network links (line geometries). Each network link has a link id, start node id, and end node id attribute. I want to use this network in GRASS, so after importing the ...
2
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0answers
31 views

Nearest Neighbor Based on Network of Lines in QGIS [duplicate]

Is it possible to incorporate a network into the MMQGIS hub distance analysis? Essentially I have a point shapefile with zip code centroids and I'd like to determine the closest shipping hub (also ...
2
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0answers
44 views

inputing road network as nodes and arcs in java

I want to input a road network as nodes and arcs. Some of the nodes are intersections, others serve to describe the shape of the road. Road network should be modeled as an embedded graph consisting of ...
2
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0answers
32 views

How to import and display a road network in XML to ArcGis?

I am trying to convert xml data to shapefile features using ArcGis 10.1. Im using the open source SUMO traffic simulation software. Part of the model process is to convert OpenStreetMap road network ...
2
votes
2answers
29 views

Harvesting pixels using GRASS GIS

having a binary raster map of pixels of interest, a road network, and a target point, my goal is to get a raster map with network pixels having as value the number of pixels of interest they allow to ...
2
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0answers
24 views

Path on network returning wrong results

I have created a shapefile of polylines that represent a path with multiple intersections. Then I have used the networkx python library to create a network. At the first the results were satisfactory. ...
2
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0answers
19 views

Route Analyst acts odd at using custom impedance

I need to do a route analysis with a custom made impedance, which is impedance based on the surface type. Here is the problem: while the route Analysis acts perfectly fine with the default cost ...
2
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0answers
28 views

Why outside border of a service area is always not reasonable?

In ARCGIS 10.1 network analysis, why results of service area are different if number of break points is changed? For example, the grid is 300m*300m, I try to produce service area around a node. ...
2
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0answers
478 views

How to specify cost attributes for network analysis in QGIS using the GRASS plugin?

I have a road dataset with information about the length, speed and drivetime for each segment. I use QGIS 1.9 with the GRASS plugin to do different types of network analysis, but how do I set up the ...
2
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0answers
145 views

Plot the Shortest Paths in a Grid without any clash at a point of time

The efficient algorithm needs to be done and proved for the best solution for the given problem: User inputs: (#) Size of the NxN Grid. (N); (#) No. of Paths: Z; (#) Source and Destination ...
1
vote
2answers
109 views

Suggest an algorithm to measure how a node is connected to road network

I try to measure how well a node is connected to the rest of the network. If a city has a distant suburb connected with one sole road, it's connectedness is, say 1. If it's connected by 2 roads, it's ...
1
vote
1answer
28 views

Setting junction properties in ArcGIS Desktop?

I have a situation where I have a line feature class and need to build a network out of it. The lines represent roads. I wonder how I can model the intersections on the network. Almost all of them ...
1
vote
1answer
117 views

Unable to access GeoServer from another computer in the same domain

I installed GeoServer 2.5.2, GeoNetwork 2.10.3 and Tomcat 7 on my Windows 7 computer {MyComputer} in our company's network. Now I would like to access GeoServer, GeoNetwork and Tomcat from other ...
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1answer
41 views

How to compute drive access to a station based on vehicle origin points? [closed]

I have a shapefile that contains station locations and another shapefile that is the geocoded origins of those who drove to the station. I would like to make a buffer around the station that shows the ...
1
vote
1answer
88 views

Infrastructure networks in GIS modelling

I am currently working on a GIS-based project which aims to model the interdependency of existing infrastructure networks, e.g. transport, oil, pipeline networks, etc. The network interdependency ...
1
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1answer
363 views

How to create routable network by pgrouting with assign_vertex_id?

I'm trying to create the routable network as per http://underdark.wordpress.com/2011/02/07/a-beginners-guide-to-pgrouting/and use assign_vertex_id. Do I still need to create the node table? How would ...
1
vote
2answers
133 views

Error using Grass v.net

I'm trying to connect my network to a points layer with a threshold of 4500 meters. I have about 11000 or so entries in my polyline and about 24 in my points layer. I have alreday used v.distance, ...
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1answer
201 views

PostGIS Implementation of Brabyn and Skelly Road Network Travel Time Model

Is there a PostGIS implementation of the Brabyn and Skelly road network travel time model for the New Zealand road network? This model is outlined in: Brabyn L, Skelly C. Modeling population access ...
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1answer
836 views

Create closest point on multilinestring to use in shortest_path()

I am working a routing based application where I need to create a route between two points of interest. The problem which I am facing occurs after calculating network topology using ...
1
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1answer
54 views

Collapse multiple lines into a single line

I need to create a route (line) feature class from another feature class that contains multiple lines making up the same route. pic 1 shows the original feature class with the multiple lines. pic ...
1
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1answer
64 views

How to find the best location to put a facility within network so that all points are near a facility?

Suppose I have many points distributed in a network. I want to place three facilities in the best way so that all points are near a facility. How can I do it? Any solution and software should be fine ...
1
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1answer
45 views

Is it possible to make stops not in a certain sequence in order to find the shortest route with the network analyst?

Is it possible to make stops not in a certain sequence in order to find the shortest route with the network analyst? I now use the small green points as an input stops because I want the lines with a ...
1
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1answer
75 views

How to create a routable network with PGRouting

I have two sets of data Table A: Stations - contains postal code (which I can convert to lat/long), name and code. Table B: Connections - contains a possible list of connections including source, ...
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1answer
82 views

How to make pgRouting understand bridges and tunnels?

I have I highway that runs on a bridge over a couple of blocks in a city. How do I get pgRouting to understand that cars can't move from the small blocks on the ground up to the highway on the bridge ...
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2answers
92 views

How to develop a fastest road website?

I need to develop a website to find the fastest road between two points (just like google map) What kind of technologies I need to use? What are the components of this project (database, website, ...
1
vote
1answer
404 views

Network Analyst does not take oneway street from attribute table

I want to build a network dataset to calculate travelling times for buses (service area). I have on shapefile with the streets from my home town, which has a column intitled 'ONEWAY', with values of ...
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vote
3answers
475 views

Merge Multipart Feature Line

I'd try to merge multipart feature line, but didn't work. would you please teach me how to merge multipart feature line? I work in version environmental and geometry network. Regards,
1
vote
1answer
250 views

ArcGIS 10.1 Network Analysis- How do I get appropriate network dataset?

I have acquired London road dataset from the Open Street Map however after creating and building the network dataset in ArcCatalogue the solve tool could not return the routes because of errors no ...
1
vote
1answer
486 views

Retrieving XY from point graphics set in WPF network (arcgis 10.0)

I have a WPF application using ArcGIS 10. In the application I can set two point by clicking on map and calculate route between them. every time I click on the map, The application creates a ...
1
vote
1answer
649 views

Create a Minimum Spanning Tree based on a street network (ArcView)

I hope you can help me with my network analyse problem (ArcGIS 10.0 SP2 - ArcView License) Background: I try to create a network of fiber optic cables to specific points along a street network. ...
1
vote
1answer
2k views

How can I calculate driving distance between 2 lat/long points

I want to build a .NET application that can get an input of 2 lat/long points and return an output that specified the driving distance between the points. Appreciate suggestions for API's or methods ...
1
vote
0answers
24 views

An algorithm that could find a random cycle in a graph

I am looking for an algorithm that could find a random cycle in a graph from a node while that cycle is traversing around another nodes (area). For example, from the green star on the left of the ...
1
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0answers
22 views

Once route is solved, also return encountered barriers from ArcGIS Server Network Analysis?

I have came across an unexpected "issue" while working with the Esri JS API and ArcGIS Server Network Analysis service. Once user submits the route solving task to the server, I'm appending the ...
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0answers
79 views

Representation of road networks at junctions when line width is varying with attribute

I have a road network and for every road segment the average number of daily traffic. I need to draw a map where the line width for each road segment is proportional to the daily traffic. I can do ...
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0answers
22 views

GRASS GIS: Network analysis doesn't work correctly

I got a problem with the Network Analysis function v.net.iso in GRASS. I tried it so many times but the function doesn't work correctly. I tried to calculate isolines via the function v.net.iso, based ...
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0answers
36 views

What is the math behind Avoid High, Medium, low in Network Analyst and can it be changed ?

When you are creating the network, in the attribute section you can define restrictions. Of such restrictions are Avoid High,Medium, Low and Prefer High, Medium, Low can someone mathematically explain ...
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0answers
18 views

Is there a QGIS equivalent to ArcGIS's Make OD Cost Matrix Layer (Network Analyst)? [duplicate]

I'm looking to create a OD cost distance matrix for a network data set I have created. Is there a way of doing this in QGIS which is akin to Make OD Cost Matrix Layer within ArcGIS's Network Analyst. ...
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1answer
101 views

QGIS 2.6 simplify a road network to obtain the intersections

In QGIS 2.6.1 in Ubuntu, I want to measure the density of block in this city (FYI my final aim is to measure the TOD level). I have the road network from French national IGN dataset BDTopo. I have ...
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0answers
10 views

Route From Network Analyst Not Fully Displayed

I am working on a project for finding the optimized route solid waste pickup within a defined neighborhood. These are my setting for route properties. The curb approach must always be on the right ...
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0answers
38 views

Map Routing (paper route) [closed]

I am doing a undergraduate GIS project. It entails a paper route for newspapers in the Pittsburgh Area, so far I have plotted all of the points in a point layer. I have now plotted my points, what ...