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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33 views

Road shapefile - UK - detailed [closed]

Does anyone know where I can find detailed shapefile of roads in the UK. By detailed I mean that the road is defined by two lines - left and right edge. I have found the OSM data and Ordnance Survey ...
4
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2answers
142 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 ...
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1answer
17 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 ...
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1answer
40 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
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1answer
9 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
22 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
66 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
31 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
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1answer
47 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 ...
0
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0answers
34 views

How to download all Points of Interest within a boundary from Google Maps

Is there any legal way to download google maps POI information such as number of POIs within a district boundary, using area shapefiles? How about length of roads within an area boundary? Output ...
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1answer
67 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?
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1answer
101 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 ...
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0answers
24 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 ...
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0answers
50 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
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1answer
49 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. ...
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1answer
254 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?
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2answers
237 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
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2answers
195 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 ...
3
votes
2answers
189 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 ...
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0answers
48 views

How Google Maps get the Speed Limit Information?

Google maps started showing speed limit information in certain areas in the U.S. as featured in this article I'd like to know how Google maps get the speed limit information? My guess is Google gets ...
1
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0answers
41 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
22 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-...
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0answers
21 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): ...
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1answer
111 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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0answers
54 views

Splitting road network into non overlapping segments in QGIS [closed]

I am having a road network shapefile. I want to split it into smaller edges in such a way that each edge consist of two diversions. I am unable to do so. Here n1, n2 and n3 are any three adjacent ...
1
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1answer
126 views

Removing small segments of geometry from shapefile using FME?

I am working on road dataset on a country level. The gdb contains the entire road network which we have extracted from 3rd party source provider. But the road network which we have fetched ...
0
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1answer
81 views

Mapping out railways from paper?

I have a physical copy of a map with railways that I want to import directly into ArcGIS (the network of railways), but I have no data on coordinates of any kind (it's a really old map but the lines ...
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0answers
39 views

Determining if Runoff Sinks drain to stream or drain to road?

I've tried using the linked method to determine area that drains to stream vs drains to road. For some reason when I run the watershed tool on the the raster representing stream and road features, I ...
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2answers
43 views

Breaking lines in PostGIS?

I have a roads table and I want to break the lines in the intersections like the v.clean tool from GRASS (I'm talking about how the break tool in the parameters works). How can I do the same process ...
2
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0answers
67 views

Creating a continuous raster road network using Polygon to Raster in ArcGIS Pro?

I have a polygon forest road network that I would like to turn into a raster. I have attempted to use the ArcGIS Polygon to Raster tool, but whenever the majority of a cell falls outside of the ...
1
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1answer
139 views

Static traffic visualization for certain streets with the help of historical traffic data, in QGIS? [closed]

The goal is to make a static map highlighting certain streets in a city that usually have high traffic (for example, highways and main roads). I am using OpenStreetMap for the city. The streets need ...
3
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1answer
431 views

Digitize objects in a LiDAR point cloud?

I am working with LiDAR point cloud data of road networks. The goal is to digitize all visible objects like hydrants, streets, sidewalks. My input data is available in LAS or ASCII format. My first ...
3
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0answers
144 views

Recognizing when road is uphill and when downhill using QGIS?

How do I automatically recognize and cut roads of a great network in places when the roads are changing the path uphill and downhill using QGIS? I have a geotiff dem. Schematic truck's transport
1
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1answer
240 views

QGIS 3.2 - How do I join road segments together like they're shown in a Road Map/Atlas?

When I imported any of my Roads Layers ESRI Shapefiles from OS Vector District data into QGIS 3.2 using one of the pre-defined Road Symbol representations, I get a very poor result showing the road as ...
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0answers
92 views

Adding a new link to an existing road shapefile in QGIS [closed]

I have an existing road file of Auckland. I wish to add a new road to the existing shapefile so I can calculate a revised distance isochrone. However, when I add the new link, it is ignored by the ...
0
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0answers
31 views

Checking if road passes through a trapezoid?

I have a straight road defined by 2 points with latitude and longitude. I also have a trapezoid defined by 4 points with latitude and longitude. How do I check if the road passes through that ...
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0answers
53 views

PostGIS generate lanes for multilinestring map (ST_OffsetCurve)

I currently have a road network for specific area as multilinestrings. It only shows the road as a single line. I would like to generate lanes for that as well, using some kind of offset. The problem ...
0
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1answer
315 views

Getting width of road segment given its end points using Leaflet?

I want to highlight a road segment on a Leaflet Map. I have the coordinates of the end point of the road segment, so could plot it as a linestring. But the problem is how can I get the width of the ...
3
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1answer
251 views

How to tell if a geo-point is on a road

I am looking for a robust way to determine if a geo point (long, lat) is located on a road I am currently using openstreetmap overpass-api with the following query: way[highway](around:3.0, {lat}, {...
0
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1answer
63 views

OSM database and congested roads

I'm using San Francisco OSM database, which contains the name of each edge, the id source and id target of each vertex. I need to use the information of the most congested routes in San Francisco, but ...
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0answers
47 views

Seeking automated approach for categorising roads according to their designs using QGIS?

I have a shapefile comprised of polylines. The road segments are represented by lines that are between nodes. I want to categorise each road segment accordingly as they appear either as a straight ...
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0answers
113 views

Showing cumulative load by road segment using QGIS?

The picture shows the forest roads where wood transport is carried out by trucks. From polygons, logs (wood) are collected near roads and then transported. How do I show or sum cumulatively ...
1
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1answer
204 views

For each row of GPS coordinates, get value from nearest road to coordinates and copy to said row using PostGIS? [closed]

I have two tables in my database; one contains a set of GPS coordinates of a car which have been converted to geom, and another containing Open Street Map road data, including the speed limit for most ...
0
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1answer
187 views

Identifying road segments completely cut off by polygon using QGIS?

I have a road network (black line) and I want to identify all segments that are completely cut off by my flood polygon (blue polygon). I have clipped the road network to get all roads within the road ...
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0answers
79 views

Creating center-lines from amorphous-shaped polygons? [closed]

I would like to create road-center lines for amorphous-shaped images as in the example. void area is shown with white and solid area is shown with black. So I would like to create a center-line for ...
2
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1answer
239 views

How to join attributes of points with several overlapping polygons?

I am making a road atlas using QGIS, where the pages overlap: I would like the intersection of the roads and the edge of each atlas page (for example, Point A and Point B) to tell which pages you ...
1
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0answers
83 views

Speeding up workflow of generalizing OpenStreetMap road data?

Whenever I want to use OSM data for medium scale maps (e.g. 1:200.000) I run into problems. On the screenshot below one can see the orange street that goes from north to south. It has the attribut ...
5
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2answers
525 views

calculate slope of lines between nodes?

I need to calculate the mean slope of roads between nodes with QGIS. I have a DEM and a vector (PostGIS) with the roads, nodes are additionally displayed as point shape and also contain an elevation ...
2
votes
1answer
215 views

Applying merge policies when merging features in same layer using ArcGIS Desktop?

I am trying to figure out how to merge line features within the same feature class such that particular fields will be summed. For example, in the following picture I have two lines that I wish to sum ...
1
vote
1answer
91 views

breaking road segments based on another shapefile in QGIS [duplicate]

I am using QGIS 2.18 and have a road celterline and a grid shapefile which I am using to create an atlas book. What I want to do is break each road at the edge of each grid that it crosses but I have ...

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