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

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161 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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1answer
99 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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121 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 ...
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1answer
707 views

Can't select layer in the Road Graph plugin QGIS

I'm trying to use the Road Graph plugin in QGIS 2.2.0. I have tried a few line shape files, but it won't let me select the layer (the option is greyed out). I've tried adding a 'SPEED' field and a ...
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1answer
86 views

Simplifying road network for cartography?

How do I simplify and merge segments of a complex network for cartographic purposes? As you can see, i have a lots of segments and i want to merge and simplify to looks neat on a scale of 1: 100 000. ...
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2answers
160 views

Road-construction (alignment) tools

Are there any tools available in any GIS environment for route alignment? To be specific, the tool should take a DEM and road-construction parameters -- distance and gradient, roadfill, drainage ...
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2answers
53 views

Linking data to road colour scheme

I'm getting started with a qgis map showing the quality of roads in my town. I have various data which create an index of 1-5. How do I link this index data to road data in a map, showing the bad ...
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2answers
181 views

How can I use arcgis server to help me find a street according to Latitude and longitude?

I am now in a project using a taxi GPS data(latitude and longitude ) to locate the road segment it is being on.I have the road map data. So, I wonder if I can use arcgis server to get the road segment ...
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1answer
357 views

ROAD COORDINATES Data (CARDIFF)

Does anyone know how to get road coordinates data from openstreetmaps? I know its possible I just don't know how. Thank you!!
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1answer
846 views

Create buffer-lines in QGIS alongside Vector lines

I am currently doing a map of a farm, to see which roads needs to be repaired. Those roads are either one sided fenced, on both sides fenced or not fenced at all. I want to make buffer lines around ...
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1answer
204 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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2answers
82 views

How are section of roads uniquely identified (in both directions) by Google Maps?

I am wondering whether roads around the world are uniquely identified by a certain value in Google Maps? If so, are they mapped uniquely in terms of their direction? i.e is route A to B is identified ...
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1answer
144 views

How to label line features using python code?

I used the following code to label the line features(roads) in a layer.It works in the console, but not by python code(application) It works for the points too. What did I do wrong? Any help would be ...
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1answer
61 views

How do I know what direction a road is drawn in OSM?

I'm trying to add a cycleway bike track to one side of a road, but I can't tell which side is left or right. The docs say "relative to the direction in which the way was drawn in the editor" , but ...
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1answer
125 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
274 views

How to build, store and index a road network from a digital city map

I'm totally new to this domain so my question may sound like a little bit silly…… I'm eager to know how to extract, store and index the coordinates of the road segments(edges) and intersections or ...
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2answers
87 views

How to find out to which road each points belongs to?

I am new to GIS . I hava a folder it include a .mxd file and a .gdb folder, the .gdb folder hava many .gdbtable and .gdbindexes files etc, it's a road network data of a city. Now, I want to know ...
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1answer
220 views

MMQgis Plugin error in Qgis

I am using Qgis 1.9 .Just now I downloaded a plugin "mm qgis"But When I run this plugin I am getting following error: An error has occured while executing Python code: Traceback (most recent call ...
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1answer
77 views

Assigning an intersecting line length dependent value to a raster during polyline conversion

I am converting a road network polyline into raster format- my polyline shapefile has an exhaust emissions rate attribute which is in kg/km What I want to achieve is a raster that has (at say 5m ...
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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, ...
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1answer
388 views

Small Idea to get best path between two points

Guys I don't know if its a good place to post ideas or to ask general questions. Still as the question is related with maps service, I am posting it here. If it's not the right place, please move me ...
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1answer
39 views

Orphan road segments

I am working with OSM road data for a developing nation. Included in the dataset are various small networks of roads that are orphans or islands i.e. not connected to the main road network. For ...
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29 views

Placing road labels only at map edges and road intersections in QGIS

I want to place road labels only near the map edges, and where roads intersect - as depicted by the red X's in the image. Background: I've seen the military do that in their topo maps, and I think ...
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1answer
44 views

Trace tool being very erratic in ArcMap?

Right now I am working on a project where I have a road network, and I have a layer with points on a bus route. I am trying to trace these points along the road network to create bus routes. It was ...
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1answer
63 views

Why doesn't QGIS 2.8.2 Road Graph accept my road network vector?

I'm using the Finnish official Department of Transport's "digiroad" road network vector file, which has all kinds of roads, cycle paths etc on it, but I can't use Road Graph on it. If I create a new ...
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1answer
38 views

Distance between point layers [closed]

I have a point layer with geographic boundaries of an area and another point layer with road network. I want to calculate the distance of each point of road network layer to the points of the ...
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64 views

Divided road segments from XTools Pro need unique, informative IDs

I can divide segments with my road using XTools Pro, but I want to give a useful identifying number to each segment. For example: If D100 road has been divided into 20 segments, the segments must ...
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37 views

How do you restrict road access by vehicle type in ArcGIS Network Analyst?

Is there a way to restrict road access by vehicle type? Some roads restrict trucks, some roads have height/weight restrictions, and some roads are restricted by the type of license plate (e.g., ...
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26 views

How do you restrict road access by time in ArcGIS Network Analyst? [duplicate]

I was wondering if there's a way to restrict road access based on time of day (i.e., create a time restricted road). I'm familiar with restricting roads based on vehicle weight/height, but time ...
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1answer
72 views

Grass GIS “v.in.ogr”: How to prevent crossing lines from beeing split where they don't share a common node?

I want to import a road network into grass gis to run network analyses. I use "v.in.ogr" to import my road shapefile. The problem is that Grass GIS seems to split every crossing line no matter if they ...
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28 views

Routing and OpenLayers: How would you connect a point to another through a 'road' node? [duplicate]

So my question is in a routing application,probably using osm as base layer, how do I get a line-string that goes through the road and not directly from one point to another? Is there any ...
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1answer
48 views

What's the best way to merge various road data into a single layer?

My company has two different road layers: 1) County roads 2) Old CAD roads Each with their own pros and cons. I'm attempting to merge these into a single road layer that will be maintained. The ...
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1answer
162 views

How to calculate highway lengths using QGIS? [closed]

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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62 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
21 views

Alrign Track from GPX file with roads [duplicate]

I'm looking into possibilities to align track data from a GPX file with known roads, perhaps coming from OSM. So far I'm able to show the tack as such on a map powered by leaflet. Since the app ...
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0answers
118 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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2answers
28 views

Global roads information prefrably with traffic volume

Im looking for a high quality global roads database. The only constraints I have is that it should be completely open (even foe commercial use) I have looked into some publicly available databases ...
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1answer
60 views

How to obtain the shape or width of a road in GeoJson

I'm new to openstreet maps and the geojson format. I'm drawing buildings and roads using GeoJson. A Building is represented as a Polygon, thus i can create the proper geometry as needed, but a Road ...
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2answers
174 views

Populate cross street name at intersections

Just a follow up of an older post seen here: Python script/Model to populate cross street names at intersections I need to create a shapefile of Road segments with a "To_Road/s" and "From_Road/s" as ...
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1answer
13 views

Checking if a POI is on the road

I have a list of POIs from around the world and their latlongs. I also have the database from all roads in the world. What I want to do is find the popular roads from all of these. My idea was to ...
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1answer
37 views

Getting flood depth grid values for road segments?

I have a 2 features, the first contains values for flood depth (Raster, GRID). the other is a road network (vector, polyline) that has been clipped to the boundary of the depth grid. I am racking my ...
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2answers
41 views

How to calculate miles of road in street network

I have a road network we use for our city. It has ever single road created and categorized. What would I do if I wanted to calculate the total miles of roads in this network?
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1answer
100 views

Drawing roads with different widths

I'm drawing roads with different widths. The road data is constructed using GeoJson. (Each road is represented with a LineString.) When I draw the roads with almost the same width, a trivial, direct ...
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0answers
76 views

Is there a way to create a custom, navigable GPS route?

Is there some sort of way to create a custom GPS route that can say, be plugged into a maps app like Google or Apple maps? For instance let's say I created a route that is a drive along Pacific ...
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0answers
24 views

What are the rectangular black markers shown in the roads of Google maps?

I'm doing some image processing to quantify the connectivity of London's roads. I'm not a geographer or map-expert and I would like to know what are the black rectangular nodes/markers in this map. ...
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37 views

Stopping a route using attributed length

I am working in a project where I need to run routes from several points on a route network and have them stop at a specific length. I have worked out their max distance want to use this attribute to ...
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0answers
32 views

road network construction using latitude longitude and timestamp

I have gps data(latitude,longitude and timestamp) of a city over a month I want to use some routing algorithms on that data so need to construct road network or graph So how to construct road network ...
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60 views

COGO distortion

I'm trying to input a road center line using COGO, I don't have any experience using the COGO toolbar on any ArcGIS version. I'm currently using ArcGIS desktop 10.2. The road project is roughly 6 ...
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15 views

symbolic display of line direction

I have a vector layer representing a road network that is encoded as a series of directional links. Thus, each is represented by a "from" and a "to" node whose coordinates are known. Is there any way ...
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1answer
40 views

Road network comparisons - how to extract roads that do not completely fall within the buffer

I am trying to compare how well one road network aligns with another - I have created a buffer around the first network and would like to select only the roads from the second network that fall ...