Questions tagged [flow-map]

A map designed to show the direction and/or volume of a resource moving between origins and destinations. Note this tag is for the cartographic representation of such data.

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24 views

Incorrect creation of flow direction raster from interpolated DTM in ArcGIS

I have DTM for quite small area (400x200 meters) which was interpolated from elevation points. I want to create raster which will show water stream (not arrows but basically slope and river flow map - ...
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35 views

Creating a Origin-Destination flow map with Non-Spatial dataset

I am working on a project where I am trying to learn some geopandas. The dataset that I am using is the LEHD Origin-Destination Employment Statistics that gives you a csv that has a work/home geoid ...
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28 views

Generating flow map with varying width and alpha level which accumulates using ArcMap

I'm using ArcMap. I have a very large line shapefile with ~300'000 links which all have the attribute flow (a numeric variable from 0-200). My goal is to display a map like in this example (produced ...
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1answer
230 views

Curved arrows in QGIS using geometry generator

I use QgGIS 3.10 and this tutorial https://anitagraser.com/2019/05/04/flow-maps-in-qgis-no-plugins-needed/. I am able to create lines of varying thickness and color depending on the weight of the ...
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1answer
80 views

Virtual Layer Symbology in Legend

I am new to QGIS and I'm using QGIS 3.8 on a Windows machine. I'm creating a commuter flow map using a virtual layer similar to the one Anita Graser has created here. When I try to add in a legend all ...
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1answer
129 views

Making XY To Line not give shortest distance in ArcMap

I am creating a very simple map through XY to Line in AcrGIS. However, since the destination is New Zealand and located at the bottom corner of global maps it creates the following. Is there a way ...
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1answer
603 views

Flow map of commuters using QGIS

I need to show in QGIS the a flow map of commuters in a municipality of Italy, Bari. In a CSV file I know the place they come from (a field called ORIG) and the place where they go (the field DEST) ...
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1answer
270 views

QGIS Virtual Layer Join SQLite/ Spatialite

I am attempting to recreate a flowmap workflow from @underdark The first step involves joining a non-spatial edges layer to a spatial nodes layer: SELECT StartID, DestID, Weight, make_line(a....
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2answers
529 views

Adjusting flow map styles in QGIS 2

In one project, I am trying to adopt marvellous styles for flow maps created by @underdark. At this moment I have the following output Shapefile was created with the usage of Flow maps (Oursins) ...
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1answer
57 views

ArcMap Flow Map lines get cut off

I am new to GIS and am doing a global flowmap using ArcMap 10.6. The flow lines from East Asia/West Pacific to the NE USA should cut off in the mid-Pacific (on far right of map) but instead continue ...
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755 views

Creating a flow graph in QGIS 3.4

I attempting to make flow graph in QGIS 3.4, some thing like I have found several 'ways to do it' in QGIS 2.xx eg QGIS2.0 method I known its possible to get a line with arrows by just change the ...
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1answer
1k views

Flow map with QGIS 3 [closed]

I've used QGIS for many years and made great flow maps. But within QGIS 3 I can't find any flow making plugin like the ones in QGIS 2.X versions. Do you know how to do?
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117 views

Selecting or highlighting upstream elements

I would like to use the information from the Swedish SMHI related with their hydrological model elements (catchment areas) that have a Containment hierarchy structure, each element has the information ...
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1answer
1k views

How to offset lines in QGIS that share the same origin and destination

I have a set of lines in QGIS that represent travel between destinations. Some of these lines of travel overlap - for example, traveling from Rome to Paris, and then back to Rome, and then on to ...
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1answer
198 views

Wrong results joining places to create flow map

I have to do a flow map (home->working place) for my area of interest (28 french cities). I get a database .dbf created by a french institute. I imported it into postgres/postgis. One row = 1 people. ...
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180 views

show relations between polygons by highlighting polygons

Is it possible to show relations (for example traffic flow) between polygons (for example counties) by highlighting related polygons by doing a query on a start polygon using QGIS? Here is an ...
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445 views

How to calculate the distances to outlet along the flow path ?

I have created these raster files for a river basin: DEM Flow Direction Flow Accumulation I like to genereate a layer how it is shown in the picture below. I need the values for the distances from ...
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1answer
1k views

Legend of Flow Direction calculated with processing toolbox QGIS (SAGA)

I tried to figure out the legend of the output for flow direction when I use the QGIS processing toolbox function from SAGA (Channel network and drainage basin). I get a raster with values from 0 to 7....
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2answers
2k views

Longest Flow Path in QGis

From a DEM of a watershed, how is possible to calculate the longest flow path? I know this questions has been asked before but I haven't found a complete solution yet.
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246 views

QGIS flowmapper migration arrows from origin X to destination X - possible?

I have a question about QGIS with the Flowmapper plugin. I am trying to visualize some real estate data. I have data about consumers who are actively searching for housing and what I want to visualize ...
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1answer
361 views

How do I separate/visualize polylines that overlap? (Show them next to each other)

I have a network of polylines between multiple nodes. All nodes are connected with lines in a two-way system (A->B and B->A). I want to show all the lines at the same time, but the problem is that ...
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1answer
316 views

Inputting Multiple XY Data from a .csv file in ArcMap to Create Flow Lines

I am doing a project where I need to create a flow map in ArcMap 10.4.1. I have imported the data from an Excel spreadsheet that I put together. The problem I am having is that when I Create A ...
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0answers
98 views

Multiple flow distance rasters produce low distance values along catchment boundary [closed]

My problem makes use of ArcGIS tools generally and Spatial Analyst in particular, but my question has more to do with hydrological modelling and working with DEMs. My goal is to obtain flow distance ...
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77 views

Zip codes, Geo coding, Joining/relating

I have a file of Tennessee zip codes and another excel file including 600,000 origin and destination addresses with zip codes and trip purposes. Since I cannot Geocode all 600,000 addresses, I ...
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1answer
304 views

Export shapefile of a flow map with arrows indicating their direction in R

How can I insert arrows on flows and export flows map with arrows indicating their direction in R? I know that I can use the arrows command of the maptools library to "print" an arrow in line with ...
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92 views

QGIS - Flowmapper uses only first node

Running on QGIS 2.14.2 for Mac OS X. I installed Flowmapper and prepared the three files required in txt format (node coordinates, node names, matrix). Flowmapper imports the files OK through its ...
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124 views

Map library supporting linestring curve rendering to produce flow map

Is there some function/plugin for any javascript map library (OL, leaflet, ArcGIS API for JS) to render WFS or Geojson LineStrings not as simple line but as curves? I want to make mobility flow maps ...
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1answer
582 views

FlowMapper plugin Error in QGIS 2.12.0 Lyon

I have a problem using FlowMapper plugin. But I don't now why. This is the message: Traceback (most recent call last): File ".../python/plugins\FlowMapper\flowmapper.py", line 2656, in run flowpyv07....
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92 views

How can I run QGIS Flowmapper in batch mode?

I installed and used the Flowmapper plugin in QGIS. It works perfect. However, I have numerous matrices that I need to create desire lines. Doing it one by one is pretty tedious so I wanted to run ...
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1answer
1k views

Creating flow map with matrix table using QGIS?

I have a map http://prntscr.com/95zoyh and also data in a table (matrix table ) and I would like to have a map with different weight arrows depending of the data. Is that possible to do using QGIS?
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1answer
201 views

Flow Mapping Data?

I have recently started experimenting with QGIS's flow mapping functionality. I am having trouble finding any origin/destination data online and I'm hoping someone can help? It can be for anything. ...
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2answers
3k views

How to create flow maps in Qgis

I have several records from a survey and would like to show flow map from places mentioned in the survey. I have all places mentioned georeferenced and some records mentioned no places and others ...
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0answers
486 views

Representation of road networks at junctions when line width is varying with attribute [closed]

I have a road network and for every road segment the average number of daily traffic. I need to draw a map where the line width for each road segment is proportional to the daily traffic. I can do ...
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123 views

How to make input data matrix in flowmapper

I have problem with using flowmapper. I'm confused, how do I enter a text record? Can you give me an example of an appropriate text file? I've been doing interpolation and made a contour of the ground ...
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1answer
2k views

Creating migration flow map using MapInfo?

my first post on this forum :) Being a beginner in Mapinfo, I didn't find any tutorial on creating a thematic map of migration flows, something like; or I tried Arrow40 extension but couldn't get ...
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1answer
209 views

Error in creating a flow map

I'm trying to create a flow map using FlowMapGenerator. My map is trying to visually show the movement of professional soccer referees to various venues throughout the season. I plan to have several ...
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6answers
1k views

What are good colour schemes for large density flow maps?

I came across nice QGIS tutorial for mapping flows. In contrast to Alasdair, I have zero talent in colour choice. Can anybody recommend some good starting points for nice colour schemes (I'd be ...
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1answer
262 views

Flow mapper not working?

I am trying to run the test files for flow mapper plugin in QGIS but I run into an error message.
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2answers
837 views

Curved Arrows showing trade ARCGIS 10.2 [duplicate]

I have 10 points that represent the centres of countries. I want to show with arrows the flow (some kind of trade) from one country to another. The way that my table of attributes is constructed is ...
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1answer
1k views

Creating distributive flow line map showing movement of passengers from bus terminal to several destinations? [duplicate]

I'm writing my final year B.Sc thesis on transportation (pattern of passenger flow from a bus terminal to several destinations). I intend to use a distributive flow line method of spatial movement ...
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1answer
1k views

how to create a map with oneway flows using FlowMapper for QGIS

my plan is to create a map that shows the top 50 (by amount of passengers) international flights departing the United States (e.g. New York -> London, Honolulu -> Tokyo...). I want to use the plugin ...
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1answer
545 views

Flow mapper plugin failed

I want to create a desire line with the Flow Mapper plugin using QGIS version 2.1. After I did, it has failed. The data that I used is pictured below. There may be an error procedure I have used. Can ...
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1answer
1k views

Flow Mapping Lines by Magnitude

I am attempting to map the flow of remittances into Japan using the FlowMapper plugin in QGIS. When I use the Style--> Advanced--> Size Scale field--> magnitude command, the lines become so thick and ...
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1answer
1k views

Does software exist to create Flow Maps (for migration of people) on Mac?

Does anybody know a good, and easy to use, software to create flow maps? I want to create flow maps for showing the flow of people between places (migration). The software has to be compatible ...
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2answers
2k views

How to create arrows lines automatically on ArcGIS, for a thematic map of directed flux?

I need to create a map with the Import and Export Flux between countries. I have the needed data in my table. But I wish to know if there is any tool or extension which will allow me to create those ...
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1answer
6k views

How to create desire lines in QGIS?

How can I show the flow coming from an Origin-Destination matrix as desire lines? I need a result like the one in the picture below. I need to scale them proportionally to its value (coming from a ...
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1answer
2k views

How to make the thickness of traffic volume flow symbology proportional to traffic counts?

I can scale the bandwidth proportionally to the traffic volumes; however, I cannot show the directionality of the movements. Volumes for directional moves are stored in two different columns of a ...
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2answers
780 views

Flow map from aggregate data with QGIS? [duplicate]

I want to create a flow map in QGIS. I have a list of cities and I have to show how many people travel from one city to another. For example, 5 people traveled from Vantaa to Helsinki, 10 people ...
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1answer
1k views

Flow mapping visualization using a road layer [closed]

I am trying to illustrate travel using a flow map on a road layer. My data is: city of origin destination number of travelers How do I use a polygon city layer (or point) and a road layer, with line ...
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1answer
3k views

Making radial flow map showing curved lines over short distances (20km) using ArcGIS for Desktop?

Esri have provided instructions on how to make a radial flow map but I think the curved lines will only be produced over a long distance, like half the globe. For short distances (20km) a geodetic ...