Questions tagged [cartogram]

A cartogram is a map that varies the area of its elements to represent some underlying value.

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1answer
47 views

Getting the coordinates for tripoints where three counties intersect

I'm trying to make a simplified triangulation of a US state (say Ohio) based on the counties. The way I accomplish this is to treat all boundaries, no matter how crooked, as straight lines whose ...
4
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1answer
139 views

Distortion of City -Boundary-Polygons proportional to population size in QGIS?

Is there a way to distort the size of polygons proportional to their population size (as in column in the attribute table)? I want to create a map that looks similar to this: the cartogram2 plugin ...
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1answer
99 views

Creating time-space map by distorting city-points polygons using QGIS?

I've already 3 main layers on shp in qgis: the points of some places, the cities polygons and a grid of 10km, as you can see on the image. I would like to distort the map using time values to modify ...
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0answers
85 views

Merging hexagons in layer to create multiple polygons of equal size using QGIS?

I'm trying to create a hexagon cartogram of electoral constituencies for Pakistan in QGIS. I've got a shapefile of Pakistan's boundaries and I've loaded a layer of overlapping hexagons on top using ...
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2answers
328 views

Problems building a world map showing population size in QGIS 2.10 using Cartogram plugin

I am using the Cartogram plugin to build a world map showing population size. I have all required data in the attribute table. My source layer looks like this: The plugin starts processing, but ...
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3answers
751 views

Generating Grid Maps from shapefiles

I've become a big fan of a visualisation technique called grid maps. Here are some examples: http://flowingdata.com/2015/05/12/the-great-grid-map-debate-of-2015/ http://i.telegraph.co.uk/multimedia/...
5
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4answers
1k views

Dorling Cartogram Map from Shapefile using QGIS

I would like to create a simple Dorling Cartogram map in QGIS. My goal is for it to be a similar style to these maps created by the New York Times: http://www.nytimes.com/interactive/2013/11/20/us/...
3
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1answer
184 views

GEOJSON - Transition to cartogram

I have 2 GEOJSON files - 1st contains map of indian states ('India-simple.GEOJSON'), and the second is cartogram based on Gross State Domestic Product of that state ('India-cartogram.GEOJSON'). I ...
7
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2answers
411 views

How to use real GIS tools to make skewed area maps for infographics

I'm a junior GIS tech, trying to make a map as part of an infographic. I wanted to do one where the size of polygons varied with a particular numeric attribute. Something like this one, where each ...
2
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1answer
839 views

Cartogram not working: “Cancelled by user” - Why?

I am using the QGIS Cartogram plugin, but unfortunately something is not working as it should. First, the demo works just fine. But when I want to create a cartogram with my own layer. But as soon ...
3
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1answer
262 views

Is it possible to animate a cartogram with FOSS GIS?

I was wondering if anyone knows of any FOSS tools to animate cartograms? By this, I mean 'tweening' between the geographic shapefile and the cartogram version of a shapefile. This means gradually ...
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0answers
1k views

Creating cartogram maps in ArcGIS for Desktop? [closed]

I have followed the exact steps from http://www.gislounge.com/how-to-make-area-cartogram-maps-in-arcgis/ and downloaded from arcscripts.esri.com. After adding the cartogram tool into the toolbox and I ...
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0answers
202 views

How to display missing objects in QGIS 2.8.2 cartogram?

I've just created cartogram using styles/graduated symbol. But there are some missing elements on the map. Objects without data in attribute table are not present on the map (NULL in corresponding ...
6
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3answers
6k views

Creating map with same-area hexagonal polygons using ArcGIS for Desktop?

I'm trying to figure out (1) what this type of map linked here is called (I've been unable to find the name through search), and (2) whether there is an Arc tool that will transform a shapefile or ...
9
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1answer
1k views

demers cartogram

How do you make a demers cartogram from a shapefile/topojson/geojson? I have tried scapetoad and indiemapper and i can not duplicate what you find on the links below. http://graphics.latimes.com/2012-...
1
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2answers
430 views

Cartogram plugin for leaflet or OSM

Does anyone know if there is a plugin to make cartograms for leaflet? I have sets of geotagged Twitter datas and I'd like to distord the map according to the density of tweets of every area of the ...
2
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1answer
332 views

Python Error while installing Cartogram

I am quite new to GIS and qGIS especially. I would like to install cfarmers cartogram plugin. From what I understand, this has to be done manually - so I 've followed the instructions from ...
1
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1answer
1k views

Creating contiguous pixel based cartogram using ArcGIS for Desktop?

There are several types of cartograms out in the world, but I feel the best one are the continuous cartograms made with separate pixels. I recently made one on paper and then transcribed it to excel ...
3
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1answer
650 views

How to update a QGIS plugin for new version (2.2)?

The updates to QGIS 2.2 have been fantastic and I'm really liking the improvements to the interface, features and performance. However, it seems that some plugins have not survived the upgrade. ...
8
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3answers
3k views

Where has the cartogram plugin for QGIS gone?

This plugin used to be downloadable from Carson Farmer's plugin repository page. However, the repository is broken. An old version of the plugin source code is still available at https://code.google....
21
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2answers
4k views

How to create contiguous area cartograms in QGIS or R?

Here is what I want to achieve (on the right): I am looking for a tool or a method to transform a shapefile (with QGIS or R) into this form. And please be aware: It's not just clipping a hexagonal ...
2
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3answers
834 views

What Application for Vector and Cartesian Coordinate System [closed]

Goal: Visualize a picture in SQL server 2012 spatial data based on geometry Problem: In order to display a vector picture I need to retrieve X, Y coordinate (cartesian coordinate system) and ...
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3answers
2k views

Building cartograms using Web GIS?

I would like to build a cartogram map using Web GIS. I have a basemap and a set of raw data in excel. I wondered what are the steps to build up a cartogram map using Web GIS? Note: Originally ...
14
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1answer
642 views

Using non-contiguous cartograms?

The non-contiguous cartogram seems to solve a lot of the area distortions seen with traditional cartograms, while preserving the ability to identify areas by their shape lost with Dorling or Demers ...
4
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1answer
1k views

Where can I find QGIS cartogram plug-in?

Can anyone point me in the right direction of the cartogram plugin please? I've had a look on the net but can't find what I'm looking for.
9
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3answers
2k views

Intensity/Bubble Map

So I have been tasked to create a visual map of case volume shipped to each region from each of our warehouses. I think the most effective way to visualize this data is to create an intensity (bubble) ...