A road is a thoroughfare, route, or way on land between two places.

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36 views

how to get a low level road network from openstreetmap data?

I've extracted the road network of a city from openstreetmaps (filetype: osm). One part of the road networks look like this: However, there are too many details in this data. I'd like to represent ...
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1answer
46 views

Isolating a street segment and assigning it a code

How should I go about making a map of alternate side of the street parking rules (in nyc?)? Does such a one already exist (I can't seem to find one)? If anyone is familiar with the transportation ...
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1answer
51 views

How to calculate highway lengths using QGIS?

I need to create a network of highways in 8 states of the USA. Eventually, I need their length, the speed and if possible average daily traffic volume, I don't know how to extract this information. ...
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1answer
42 views

How to split/divide linestrings of larger lengths in postgis

I want to split/divide linestrings in my data. I have roads data and I want to have every road segment having length not more than 250 meter. Check the shape length of this particular line feature. ...
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1answer
31 views

how to select line segments not overlapped by other layer's lines

I have two shapefiles of forest roads (mostly dirt) from different sources, covering the same area. The goal is to build one shapefile of roads that is the composite of the other two. Layer A is ...
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1answer
49 views

Identify the direction of traveling road segment

I'm using pgRouting to find the least congested path using time as the cost metric. I am using average speed between two nodes to calculate time taken to travel in a segment. In pgRouting there is a ...
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0answers
699 views

leaflet - Drawing line following the road

Short version: What I wish to be able to do is drawing a polyline along part of a road. In that way marking certain houses, along this road. Long Version: I have several houses that I wish to mark ...
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0answers
50 views

Collapse dual carriageway lines in PostGIS

I have OpenStreetMap data, which represents larger roads (e.g. dual carriageways, aka divided highways) as parallel lines. The question is answered for ArcGIS or Skeletron here, for example using ...
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0answers
50 views

Can't edit osm_roads in udig

There is a PostGIS database that has a road network imported from Open Street Map, stored in osm_roads table. For the testing purposes I need to change some road geometry there. I tried to edit it ...
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0answers
106 views

How to relate Slope map and Curvature map so as to have in the end PERCENTAGE PROBABILITY MAP?

i am trying to deal with road detection this last month. So i am working with particle filtering that produces particles, that means possible targets(to my case cars)/points, with hidden information ...
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0answers
36 views

How to cut a shapefile using a batch?

I would like to cut a shapefile using a batch (like in the photo): But I have some problems because I don't know what do I have to put in field "extent" and after putting somthing like ...
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0answers
28 views

Why there is no output (path) for Dijkstra in pgrouting

I have a road network table and I am implementing pgRouting. everything was working fine previously but now there is something odd here. I am getting no route now. I am checking through sql query in ...
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0answers
38 views

I'm looking for an idea to calculate shortest path in a line Vector layer using a starting point

I'm looking for an idea to calculate shortest path time in a line Vector layer using a starting point in a qgis python plugin based on distance and speed. is there a solution where i can get ideas? ...
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0answers
25 views

Does a road connect one grid cell to an adjacent grid cell?

So here is the problem I am working on. I have an OpenStreetMap roadmap which I overlaid with a 2-D cartesian grid. So for a given grid square, I want to find out if a road segment continues from the ...
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0answers
45 views

draw route based on given nodes and existing line

this question is in relation with an application i m building for my project.I have a points layer having all major stations.I have a line layer having the road route connecting the stations.What i ...
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0answers
63 views

Quantum GIS Road Graph “Path not Found”

I'm trying to teach myself Quantum GIS using the book The Quantum GIS training manual by Thiede et al and have run into a problem with the Road Graph add in. The training data set I've been using ...
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0answers
186 views

Display colour coded road traffic data in QGIS

I would like to colour code a shape file containing road polylines to represent the heaviest flows of traffic. The shape file contains attribute data linked to each section of road where road traffic ...