Questions tagged [choropleth]

A choropleth map is a thematic map in which areas are shaded or patterned in proportion to the measurement of the statistical variable being displayed on the map, such as population density or per-capita income.

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8
votes
3answers
2k views

Should I use a discrete or continuous scale for coloring a chloropleth?

I am making a choropleth for an upcoming local race using D3. There are two candidates running for an election. For any given polygon on my map, if the red candidate has more votes, the color should ...
4
votes
2answers
5k views

OpenLayers 3 WMS Styling Using SLD_BODY and POST request

I'm using OpenLayers 3 and GeoServer to create a spatial web application in which I want to enable users to choose a colour ramp (using Colorbrewer) and a number of breaks for styling an attribute in ...
0
votes
1answer
401 views

Animating quantitative values in Carto Torque Cat?

In Carto (CartoDB), is it possible to change the category classifications in “Torque Cat” to be qualitative instead of categorical, as you would have in the “Choropleth” map? Both the values and the ...
5
votes
1answer
3k views

Is it possible to draw a 3D Choropleth Map in ArcGIS?

What I have in mind is something like these two examples below: Also, if it is not possible to create a 3D choropleth map in ArcGIS, is there some other GIS software package that can draw 3D ...
9
votes
3answers
19k views

Converting shapefile to SVG keeping internal data?

I am very new to GIS. I found a tutorial on how to make a choropleth using Python tools. I want to follow it but use my own data and map. However the tutorial uses a US map SVG file and I need to use ...
0
votes
2answers
5k views

Using Google Maps image as layer with Matplotlib Basemap?

I have produced a heat map of assaults in Sydney by suburb. However, my map looks a bit plain and I'd like to do something fancier - I'd like to use a Google Maps image as a background layer - I haven'...
9
votes
1answer
7k views

Decreasing distance between legend's items in R?

I'm trying to create correct choropleth() map in R using GISTools package. I use choro.legend() to display my legend. However I can't create either correct legend placement, AND/OR I don't understand ...
4
votes
1answer
1k views

Choropleth Mapping Using Quantile Method in CartoDB

My understanding of choropleth maps that use the quantile method is that they will assign an equal number of items to each bucket (see http://www.ncgia.ucsb.edu/cctp/units/unit47/html/comp_class.html)....
2
votes
2answers
1k views

CartoDB choropleth + bubble visualization with two independent value ranges in legend

I have been trying to display two values simultaneously i.e. one absolute value displayed by bubble size (as with layer wizard: bubble) and one relative value displayed by color (as with layer wizard: ...
4
votes
1answer
774 views

Choropleth with classification from multiple columns in QGIS?

I want to create a small multiple graph, which is something like this or this. I know that I can create a choropleth by using the styles panel: Basically, I pick a column attribute, choose the ...
1
vote
1answer
464 views

Overlap or intersect two choropleth [closed]

I have two choropleth of the same area but with different concentration data and I need to overlap them. My aim is to highlight the areas of intersection between the points with the highest ...
1
vote
1answer
502 views

CartoDB, Choropleth and bucket numbers in skewed data sets

How can I maximise the number of buckets in the choropleth map? We have a data set range from 1-14 and 7 is the most # of buckets available in the wizard. Unfortunately, most of the data occurs ...