Geographic Information Systems

Questions tagged [road]

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

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3
votes
1answer
77 views

Mapping polygons into lines and projecting lines on road network

I have a layer with polygons that describe road damages. I have then another layer with road network lines. The layers are shown in the picture. I need to project the polygons as lines to the road ...
-1
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0answers
74 views

Downloading Pradhan Mantri Gram Sadak Yojana (PMGSY) GIS data?

I am trying to download road data from the PMGSY/GRRIS website (http://www.pmgsy-grris.nic.in/). While the in-site visualizations are helpful, I wanted to know if there was a way to access the raw ...
1
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2answers
50 views

Road density calculation

I have a vector layer of about 62km^2. I have a vector layer of roads within that area. How do I calculate the road density (km/km2)? I did a union between the road layer and the area layer, then I ...
0
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1answer
81 views

Converting a Road shp file into a continous Road Raster in QGIS?

I have converted a Road shp file into a Raster in QGIS, however after the conversion the Road is no longer continous (i.e only the cell corners are touching). I have tried increasing the resolution ...
2
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1answer
36 views

Feeding direction of the road segments in QNEAT3 plugin

I am going to use the Iso-Area algorithm of the QNEAT3 plugin to generate Isochrones. I need to determine which parts of the road network are one-way and which parts are two-way. In the way that for ...
0
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1answer
22 views

Seeking incline of roads data

I need to plot the incline of roads in England. I could estimate this using elevation data, however this would be a significant amount of work. Does this data already exists (ideally free with a ...
0
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1answer
52 views

Seeking road network of Sweden with speed limits

I need road network data of Sweden with the speed limit of each segment of the road. I downloaded it from https://download.geofabrik.de/ but unfortunately, there are a lot of missing values there. Is ...
2
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1answer
57 views

Limiting number of duplicate labels using QGIS

I am using QGIS 3.10. I am trying to draw a map of the US interstate highway. How could I limit the number of labels to just a handful per each interestate highway? I have tried all the various ...
0
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1answer
38 views

Pairing line segments that follow a similar path

I have a shapefile with a regional travel model comprised of straight line features (model.shp, blue in the image). These lines roughly match the actual paths of the roadways they represent (road.shp, ...
0
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0answers
9 views

Layer of roads segments with attribute “STEL” by rsd.cz NDIC

Is it possible download layer with attribute "STEL"? Attribute means segments of roads in Czech republic created by "ŘSD", more information at this link. "STEL" attribute ...
2
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0answers
55 views

How to calculate area of a double-line road network in QGIS?

I have a line vector file that displays a road network. Most roads consist of a double-line indicating the sides of the road (hence the width of individual segments), but some roads are indicated by a ...
1
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1answer
103 views

USGS topo symbols for light-duty and unimproved roads

Mapping in QGIS 3.14, I want to use the same symbol as the local historical USGS 24K quads use for unimproved road and light-duty road. An example can be seen here (the black continuous road and the ...
1
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1answer
334 views

Roads not showing in Google Earth Pro

The road names are no longer showing on my Google Earth Pro. The only general layers available in the bottom left panel are "primary Database " and "terrain". I have tried turning ...
2
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1answer
70 views

Why osmId is not the same across the same road?

I download .shp and .dbf files for roads, extract it and save to database. I display points with the same name of street on my own Google Map. This is how it looks like: I was interested in how osmID ...
0
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0answers
35 views

OSM roadways shapefile - Completing missing road names

I have a shapefile for the road network in Portugal that I downloaded from a OpenStreetMap mirror site (geofabrik), dated about a month ago. A little context beforehand for those not familiar with the ...
0
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0answers
24 views

Getting roads with topography in CityEngine

I need to get a 3D model of both the terrain and the roads on/aligned to the terrain. However the import method I am using does not make useable files. Following the process of importing map data in ...
1
vote
3answers
78 views

Convert exported attribute table back to shapefile in QGIS

I exported the attribute table of a shapefile to Excel (also saved in CSV). And I'm trying to add some columns to the table, then convert the table back to shapefile with the new columns. The ...
0
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1answer
33 views

Road infrastructure efficiency measurement [closed]

Is there any tool/script that shows the goodness of road infrastructure. For example, if you want to compare which of the two cities road network is better.
5
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1answer
122 views

Blending features in QGIS: Approximating road edges for map render

I'm having trouble getting the right render for the tertiary roads and service roads look in my map render. I'm trying to get road edges like in the old USGS topo maps: Notice how the road interior ...
2
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0answers
42 views

What do these distance numbers mean?

In the picture below, the red line is State Hwy 15, while the lake in the picture is Sooner lake. Please note that the highway intersects the lake several times and is very close to it at a number of ...
0
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0answers
17 views

Is there a way to create a line from the average location of points?

I am attempting to create a series of line segments (several thousand, so doing it manually is out of the question) in a shapefile using ArcMap 10.5.1. All I have to go off of is the location of past ...
3
votes
2answers
265 views

Divide a polygon into multiple small polygons using a MultiLineString

I'm trying to divide a polygon grid into multiple smaller polygons basis their intersection with a MultiLineString using Shapely. Following code works good for LineString but not for intersecting ...
0
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0answers
18 views

Altitude information for European highways

I need to calculate the gradient in major European highways. Fot this I need altitude data for each highway, let's say every 100 meters. Are there such kind of data publicly available? If not, I am ...
0
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0answers
8 views

Postcodes for Roads London

First time asking, couldn't see a starting point to read from. I'm doing a lookup by road name (London) to get the Postcode (first part W1 / WC1H etc), i'm a 1/4 through and it has taken days to do it ...
8
votes
1answer
383 views

Place label along line near start and end of line in QGIS

I have four fields managing the numbering of the start and end of road sections. I created two label rules, one for the start and one for the end of the road sections. I set the position of the ...
8
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4answers
787 views

Extract date, time and GPS position linked to road crossing

I am using QGIS. I have a large dataset of approx a hundred animals and I want to determine the number of successful road crossings and extract the date, the time and the two GPS coordinates before ...
1
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0answers
19 views

Buffers between center points of irregular polygons

I'm having some problems, I hope some of you have some experience with buffers :) I have the road network of a city (40.000 polygons approx), and I am trying to create a buffer between the central ...
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2answers
32 views

Looking for land value data for anywhere in North America especially for Florida [closed]

I am researching on road alignment optimization. The research goal is to find least cost road alignment between two given points, considering highway codes. One of major costs which I need to consider,...
4
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1answer
10k views

Generating urban blocks by road centerlines using PyQGIS

I work on cartographic generalization project and I need to generate urban blocks by road centerlines.
4
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2answers
381 views

Switching road names from uppercase to mixed case in ArcMap?

Our county road data has road names for all roads in the county. In the attribute name field, there are some entries with all uppercase for the road name and some with mixed case. I would like to go ...
1
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1answer
28 views

Automated Road Link

I have a polyline shapefile of roads of a municipality. Each road has a unique ID (for example AR1002, AR1003 etc.) Now I want to add a field in the shapefile which will contain the ID of each road ...
0
votes
1answer
52 views

Computing total road length in fixed radius circle around a point

I have a dataset of a number of points which are plotted on QGIS using their latitude and longitude. Now, I have to find out the total length of roads surrounding each point within a circle of radius, ...
1
vote
1answer
24 views

Eliminate line sections in a merge to use Qchainage plug in

in QGis I merged several layers, each containing sections of a road, to show a longer route on a map. Now when I want to use the qchainage plug in the plug in starts the count over again in each '...
-1
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1answer
30 views

Clipping roads based on their county [duplicate]

I have both county shape files and all road lines for the state, but I would like to clip the roads based on what county they are in. How can I do this as a batch or model in the ArcMap application ...
0
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1answer
78 views

Mapinfo - Compare Road Direction

I have two layers of Road Networks. How do I compare the difference in road direction between the two layers - both are polylines?
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0answers
42 views

pg_routing source and target column issue

I have created pgr_createTopology() function on my road data table which accurately assign source and target to destination road table, but I have an issue when I split a road segment in qgis it ...
2
votes
1answer
139 views

Layering up road and rail bridges from OpenStreetMap data in QGIS

I am using QGIS 3. I am creating a topographic map using OSM data downloaded as shapefiles. Obviously of I put the railways layer under the roads layer, all railways show as passing under roads. Or ...
-1
votes
1answer
225 views

Calculating average slope using ArcGIS Pro?

I want to rate for ease of walkability for one track, I have a road shapefile and raster of the slope. Any ideas about how to calculate average slope or other methods to do that?
1
vote
1answer
260 views

Line at map scale that do not vanish when zoomed out? (QGIS 3.8)

I'm drawing rivers and roads as linestrings with width set in map units from an attribute. When zooming out, of course they vanish quickly, because 10, 20 or 100m is less than a pixel at 1:100,000 ...
1
vote
0answers
34 views

Configure shortest path calculation with specific origin/destination points

I would like to calculate the shortest path from a point to another following a network. I'm currently using QNEAT3 for that purpose, but I can either calculate one path from two specific points or a ...
1
vote
0answers
53 views

Identifying upside and downside of road using QGIS?

I am a forest engineer and I have to reclassify a DTM in upside pixels and downside ones in relation to a line shapefile indicating skid trails network of the forest parcels. I don't have necessarily ...
2
votes
1answer
68 views

Snapping lines together in QGIS

I'm using QGIS 3.8.2. I have a set of lines which represent a road network. However as I have taken different layers from different data sources the lines which represent the same road don't overlap. ...
-1
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2answers
2k views

Creating elevation profile using ArcGIS Pro?

I have one road shapfile and one raster which has surface information How can I combine them and create elevation profile?
6
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2answers
601 views

Finding a Minimum Spanning Tree using QGIS

As shown in the image I have a road network and the intersections as separate layers on QGIS. What I require is to extract the Minimum Spanning Tree connecting all points along the road network. Would ...
1
vote
2answers
550 views

Problem with intersecting lines over a polygon layer in QGIS

I have a shapefile with lines (a road network) and I want to intersect it over a polygon layer in order to finally have a polygon layer (each cell has an ID number) with the intersected lines for each ...
4
votes
2answers
379 views

Extracting roads shapefiles from old TIGER/Line RT format?

Does anyone know how to extract a roads shapefile for the US Census circa 2000? The only file I can find from US Census (e.g. https://www2.census.gov/geo/tiger/tgrcd108/CA/tgr06037.zip for Los ...
1
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0answers
49 views

How to measure the distance between two points follow the track?

I have three points shapefile and 1 line shapefile. I tried to use v.distance but it only got directly distance. How can I measure them by track?
0
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1answer
26 views

Data of left turn signal

I wonder if there is any publically available dataset that has left turn signal information (say, in the U.S.)? For example, in right-hand traffic countries, major intersections may have a left-...
0
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0answers
24 views

Create shortest route for a set number of units

I am running a field survey and would like to create routes for the surveyors. I have the building lots and road network for a particular city (road in red, lots in blue, with a Google Maps basemap): ...
1
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1answer
161 views

Styling road intersections

I have two layers with roads of different types I wish to have pretty intersections, as here Symbol levels work only for features in single layer.

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