Questions tagged [isochrone]

An isochrone is a line on a diagram or map connecting points relating to the same time.

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Creating Isochrones in QGIS

In QGIS I have tried to create isochrones around points for quite some time. Is there any option to create isochrones on the GUI in QGIS? I know how to create them using pgAdmin (using e.g. @underdark'...
groc's user avatar
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3 votes
1 answer
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Merging isolines into polygons to produce isochrone map in QGIS

There is a set of isolines produced with v.net.iso. It shows distances in meters [400, 800, 1200, and everything further] from a certain point. My desired output is an Isochrone map. However, I do ...
Taras's user avatar
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9 votes
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Cutting polygons in same isochrone map layer in QGIS

I've created some travel time isochrones using the 'OSM Tools' plugin in QGIS. I now need to remove overlapping sections of the isochrone layer so that I'm left with discrete polygons for each ...
marty_c's user avatar
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1 vote
1 answer
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Return nodes along portions of edges with pgrouting

I have been experimenting with generating isochrones with pgrouting using osm data. So far, I have been able to generate isochrone polygons by getting the concave hull of the nodes returned from the ...
Brent Edwards's user avatar
1 vote
2 answers
593 views

Calculating isochrone for linestring

I have seen APIs and algorithms for calculating isochrones for a single point, e.g. https://openrouteservice.org/dev/#/api-docs/isochrones. Is it possible to calculate the isochrone for a line segment,...
NeatNerd's user avatar
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6 votes
2 answers
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Where should I add the API key in ORS Tools?

I want to make an isochrone for my halte and station points. But I have to configure ORS Tools with my API key. The problem is, I can't find any configuration button in my ORS Tools plugin. How should ...
Rahma's user avatar
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6 votes
1 answer
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Creating isochrones in QGIS using QNEAT3

I am trying to make transport accessibility map in QGIS, using QNEAT3 plugin to build isochrones. I need to make a map, that shows 30 minutes area of accessibility with 5 minutes interval zones. I am ...
Kerbl4's user avatar
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6 votes
1 answer
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Displaying (or filtering) features in one layer based on features selected in another

I have points in a layer "Site-Centroids". I generate a lot of isochrones (polygons) around them, into "Isochrone_Site-Centroids". With all the isochrones displayed, the map is too busy. What I ...
dsz's user avatar
  • 191
5 votes
1 answer
2k views

Performing isochrone in PostGIS by pgRouting?

In pgr_drivingDistance for isochrones the person who answered, missed to say the explanation of the answer about what function used by him to get the output for isochrone. I want to do the same but I ...
Karthik's user avatar
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5 votes
1 answer
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Making nonoverlapping service area polygons using QNEAT3; service area polygon errors

I am doing a project in which I am determining which areas of New York City can be accessed within a five- or ten-minute walk of a subway entrance. I have done this in the past in ArcGIS, and am ...
UnionTpke's user avatar
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3 votes
1 answer
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Isochrones for emergency vehicles using QGIS

I need to generate isochrones for emergency vehicles. Is there any possibility of QGIS to do this? I checked TravelTime and QNEAT plugins but unfortunately, I could not find any way. With TravelTime ...
Elham's user avatar
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2 votes
1 answer
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GRASS 7.6 v.net.iso not providing output in QGIS 2.18

There are simply two layers in EPSG:31469 both are located on the Server side, see image below: points 'HST_Bestand_GK5' polylines 'vwESKN_1_25000_Teil' On my Windows 10 with QGIS 2.18 and GRASS 7.6,...
Taras's user avatar
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2 votes
2 answers
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Isochrones: v.iso.net

I have a line layer with multiple traffic lines: bus, train and tram. Those lines overlaps frecuently. Every line has its own speed limit and therefore time/cost. My goal is to do a time/cost map (...
Javier's user avatar
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2 votes
1 answer
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Using pgr_drivingDistance for isochrones?

I have tried to calculate Isochrones in 500m walking distance along paths around planned subway stations with pgrouting. For the setup I used an OSM-road.shp clipped to the borders of Vienna and a ...
K_Man's user avatar
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1 vote
1 answer
463 views

Created isochrones are not displayed (QGIS QNEAT3 Iso-Area as polygons algorithm)

I am trying to create isochrones using Iso-Area as polygons algorithm in QNEAT3 plugin. I choose the fastest past as the cost strategy. when I use the default speed to create isochrones the output ...
Elham's user avatar
  • 419
1 vote
1 answer
848 views

QNEAT3 plugin and Iso-Area polygons

I need to generate isochrones considering emergency vehicle’s speed. I have checked several packages in R and different plugins in QGIS. I found QNEAT3 (Iso-Area as polygons) as the only tool that the ...
Elham's user avatar
  • 419
1 vote
2 answers
2k views

Isochrones for public transport [closed]

Is there a way to compute isochrones for public transport while using the plug-ins available in QGIS? Or is there another way for making them? Note: I am not a software engineer which means that some ...
Adela-Ioana Moldovan's user avatar
1 vote
2 answers
568 views

GRASS v.net.iso tool produces empty output - QGIS 3.2.2

I want to split a network shapefile by cost isolines. I have two layers a point layer (with 297 records) a road network layer Every time I run the GRASS v.net.iso module in QGIS 3.2.2 on the road ...
Curious Girl's user avatar
1 vote
1 answer
150 views

Polygons have holes after pgr_pointsAsPolygon

I calculate a 500m Isochrones with pgr_drivingDistance and after that use pgr_pointsAsPolygon to create the Isochrones out of the resulting nodes. SELECT * FROM pgr_pointsAsPolygon('SELECT id,x,y ...
K_Man's user avatar
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