Questions tagged [road]
A road is a thoroughfare, route, or way on land between two places.
231
questions
5
votes
1answer
52 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
77 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 ...
2
votes
2answers
98 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 ...
0
votes
0answers
44 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
vote
0answers
32 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
votes
1answer
19 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
votes
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):
...
1
vote
1answer
77 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.
1
vote
0answers
49 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
vote
1answer
86 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
votes
1answer
67 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 ...
0
votes
0answers
233 views
Get the nearest distance between two points in a road network using GDAL/Shapely/NetworkX
I want to measure the distance between two points in a road network like this:
I have the road WKT and also the points WKT. I know that I can measure this using QGIS (road graph plugin) or PyQGIS, ...
1
vote
0answers
37 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 ...
1
vote
2answers
42 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
votes
0answers
47 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
vote
1answer
110 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
votes
1answer
294 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
votes
0answers
115 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
vote
1answer
153 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 ...
1
vote
0answers
74 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
votes
0answers
29 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 ...
1
vote
0answers
43 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
votes
1answer
226 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
votes
1answer
190 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
votes
1answer
60 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 ...
1
vote
0answers
45 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 ...
1
vote
0answers
94 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
vote
1answer
122 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
votes
1answer
166 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 ...
1
vote
0answers
72 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
votes
1answer
196 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
vote
0answers
75 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
votes
2answers
383 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
168 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
80 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 ...
1
vote
2answers
85 views
How to calculate the distance between point and a polyline along specific direction? [closed]
I want to find the closest road for point star. By using the Near tool in ArcMap, I can get the closet distance a since the closest road is road 1. However, following the red arrow direction, the ...
-1
votes
1answer
63 views
How are OpenStreetMap ways linked?
I'm using OSM API (overpy and overpass using Python3) to extract toll roads "toll=yes" in a certain search area (e.g. searchArea = California). The API spits out all the tolled ways in CA split into ...
0
votes
2answers
572 views
GIS roads data with maximum speed limit
I'm looking for street/roads data in California with maximum speed limit attributed. TIGER data doesn't have the speed limit data, and open street map data is only attributed at about 25%. I'm looking ...
-1
votes
2answers
94 views
Find road network lines that don't intersect
in ArcGIS,am looking for a quick way to show the roads that don't intersect
0
votes
1answer
152 views
How can I classify GPS points with road type?
I have a road database in .osm.pbf format; I want, for a long list of GPS points, to classify whether they fall on (with a margin of, say, 20m)
Highway: motorway, trunk, motorway_link, trunk_link
...
1
vote
0answers
48 views
Road Network Accessibility
I am working in qgis with 3 layers: one is road network and other is hospitals and locations of accidents , later two layers are as points, I want to figure out what accident location (points ) are ...
2
votes
2answers
96 views
Search and zoom to street stretch: By NAME, FROM, TO
I have a streets feature class that has name, from, and to fields. Using this feature class, I want to zoom to locations such as these:
Main St, from 1st Ave to 2nd Ave (single feature)
Main St, from ...
1
vote
0answers
40 views
Joining multiple GPS traces to a road
I have multiple GPS traces (polylines) from cars. I would like merge them somehow to create roads. I don't have access to maps in this solution so basically I'm trying to create a poor man's map, with ...
2
votes
1answer
151 views
Identifying points on the intersection of three roads in PostGIS
I have two tables point and roads in my PostgreSQL 9.5 database. Some of the points lie on the intersections of three roads (line segments). The sample scenario is as follows:
I want to identify all ...
2
votes
1answer
788 views
Merging close lines?
I downloaded some road network data derived from OSM by GeoFabrik, see the initial state:
Near Székesfehérvár (Hungary), parallel lines are probably trunk or motorway roads.
I would like to simplify ...
1
vote
3answers
571 views
Upslope and downslope distance or area using ArcGIS Desktop?
Is there a possibility to determine the surface area above the road and the surface of the terrain below the road or between two or more roads? I want to pull the trees down the hill and up the hill ...
1
vote
0answers
92 views
Compute the distance of some nodes using a road layer which are not exactly on the road
I have the road network of a region (downloaded from open street map as a layer) and a set of nodes (selected using google earth, saved as a KML file and finally converted as a layer).
I need to ...
5
votes
1answer
3k views
Splitting a Polyline at intersections
How can I split a road network into different links splitting at intersections??
The whole network is in one single layer.
1
vote
1answer
89 views
Grouping roads based on existing condition and AADT? (QGIS) [closed]
For QGIS software, I have municipality service agreement roads and an end-plan to group the roads based on close proximity (roads and communities close together or close to each other and on the same ...
2
votes
2answers
535 views
Get values of terrain elevation of roads in QGIS?
I have one DEM raster layer with elevation values and one vector layer of the roads; same size, extension and CRS.
I want to do what this guy did here:
http://youarealegend.blogspot.de/2012/07/...
