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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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17
votes
1answer
462 views

rMaps choropleth with custom json

With R I want to make an animated choropleth map with the rMaps package and a custom map. I tried to follow the example of Diego Valle described here and to use the custom map info for Datamaps. ...
13
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3answers
7k views

Choropleth in R: custom breaks and plotting

I have a question with regard to plotting a choropleth map. What is recommended with regard to plotting a map with custom breaks? And make it look a bit attractive. In my script I have used the ...
10
votes
2answers
1k views

Help choosing most suitable bivariate choropleth mapping coloring scheme

I am trying to overlay a nominal variable (2 categories - rainfed vs irrigated) in a choropleth map over a numeric variable. In order to highlight the difference in pattern among the two categories, ...
9
votes
3answers
15k 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 ...
9
votes
1answer
5k 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 ...
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 ...
7
votes
1answer
1k views

Simplest Way to Create a Custom Choropleth Map for a Website?

I am working on a choropleth map for a real estate site. My current workflow is: Edit and save SHP file's DBF in Libre Office Calc. Load SHP file into Quantum GIS. Set colored breakpoints based on ...
6
votes
3answers
2k views

Comparing choropleth maps statistically

I have several sets of choropleth maps showing ranges of poverty by census tract, each using a different poverty measure. All of the maps use the same categorical ranges to define poverty status. The ...
5
votes
1answer
66 views

How to create a saved, consistently available value/color key when styling a choropleth map in QGIS? [closed]

I've created a simple choropleth map representing birthplace data for the US, by PUMAs, for a particular shapefile (e.g., the layer shapefile_1): I've categorized the value for each of the PUMAs ...
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 ...
4
votes
2answers
7k views

Creating Zip Code-Level Choropleth Using Leaflet.JS?

I am new to Leaflet.js. Is it possible to create a choropleth using zip-code level data? I've seen plenty of choropleth examples using state-level data and even a few using county-level data. If ...
4
votes
2answers
3k views

Creating multivariate choropleth map with diverging color scheme(s)?

We recently had primary elections in the community I serve. With the results having been released, there have been some requests for precinct level maps. Many of these primary elections featured more ...
4
votes
1answer
1k views

Choropleth Mapping Using Quantile Method in CartoDB

Does anyone know how CartoDB calculates the buckets for a choropleth map using the quantile method? My understanding of choropleth maps that use the quantile method is that they will assign an equal ...
4
votes
1answer
247 views

How to determine the appropriate classification type in a graduated style choropleth map?

I have to provide choropleth maps for for Energy savings, Emission savings, Cost Savings related to different administrative boundaries such as provinces and states, but I don't know which ...
4
votes
1answer
1k views

Using timeslider in QGIS to show census data per year?

I have several shapefiles with the same geographic extend (in my case: Berlin and all its administrative subareas) and statistical (census) attribute data for every subarea displayed trough a ...
4
votes
2answers
1k views

How can I create a choropleth from the 2010 census ZCTA shapefile using R and ggplot2?

I have created state and county choropleths in R using ggplot2. The method I have used for this came from Winston Chang's "R Graphics Cookbook". For those choropleths the map was already represented ...
4
votes
1answer
847 views

Displaying null data in choropleth using ArcGIS Desktop?

I am working in ArcMap and I have created a choropleth map (using a "population" attribute) that is rendering things basically correct except that when the "population" attribute is null, representing ...
4
votes
1answer
1k views

Performing Dynamic Legend Classifications with Data Driven Pages?

I am creating choropleth maps for quantified data. Each DDP will focus on a new county, which is shown by using a clip of the data frame (by the county boundary). I want to define quantified legend ...
4
votes
1answer
2k views

display a choropleth map using D3 and Leaflet

I am trying to get a leaflet map to display a choropleth map using d3. I have written this code using samples I have found however the map just displays as the black fill, not the color classes I ...
3
votes
2answers
4k 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 ...
3
votes
1answer
579 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 ...
3
votes
1answer
780 views

Set CartoCSS ranges dynamically for choropleth

I know that I can generate a choropleth using CartoCSS like this: #volume [ number_of_cases <= 434] { marker-fill: #BD0026; } #volume [ number_of_cases <= 183] { marker-fill: #F03B20; } #...
3
votes
1answer
668 views

D3 missing zoom Choropleth + Raster

Following this example and Choropleth from Mike's site I am trying to get: image + vector + choropleth = my map As you can see I lost the zoom capability on the vector layer. I have been trying ...
3
votes
1answer
2k views

ArcGIS query - how can I find the average value (water consumption) from set of polygons?

I am fairly new to arcgis, so this is probably a really simple task, but I would like to ask advice so I can learn how to do it. :) Basically, I have a polygon layer that has attributes for each ...
3
votes
2answers
1k views

Breaking a range of values into buckets for a gradient

If I have a range of values and want to make a choropleth map with a gradient, what algorithms are out there to determine the value ranges for the different colors in the gradient? For example, if I ...
3
votes
1answer
126 views

Mapping/visualising data with Long Tail?

I work with a dataset that gathers stats from all across a city. Each datapoint is of interest and worth visualising to our users, but there are a few parts of the city that significantly deviate from ...
3
votes
1answer
565 views

Which classification method to use when comparing two maps?

I'm making two maps of world population density. The two are using different projections, so each country's population density is a bit different in the two maps. Which classification method should ...
3
votes
1answer
2k views

R/ggplot2 adding an additional line/polygon to a choropleth map

I have a choropleth map that represents the number of states being affected by a storm event. This is shown in the image below. I want to lay a transparent line or polygon over these states to ...
3
votes
1answer
853 views

Leaflet Choropleth Map

I'm trying to create a choropleth map using leaflet. When running the code below the map just comes up with each county being the same color. How do I get each county to be colored based on the data ...
3
votes
1answer
647 views

How to define boundary numbers without decimal points - Geopandas

Problem The numbers in a legend has the decimal points (eg. 0.00-4.80 at the top of the legend box), when I want them to be integers without decimal points. All I care is that the boundary values are ...
3
votes
1answer
943 views

Creating choropleth map using OpenLayers?

Is there any way to generate a chloropleth map using OpenLayers 3? The map will contain static data that is stocked in a JSON variable. The map will be published like the picture below:
3
votes
1answer
1k views

leaflet choropleth map using dynamic value

I am doing a choropleth map using leaflet and JSON data. I got a clean tutorial in leaflet site. In that tutorial the used us-states.js JSON file where the choropleth was based on the feature....
3
votes
1answer
428 views

QGIS Create Map for Each Attribute using Python

I'm new to GIS and QGIS. I've looked through several of the related questions including here and here, but can't figure out a simple way to automate creating choropleths for each attribute in a ...
3
votes
0answers
237 views

R - how to create a pre-determined number of identical square polygons to use for a choropleth map?

I am trying to plot crime data density (again!) over a city map, say of NY. As a well known problem there are plenty of examples on this (http://www.obscureanalytics.com/2012/12/07/visualizing-...
2
votes
2answers
435 views

How to import someone else's toolbox?

I'm trying to use a toolbox created by someone at Esri to help with the creation of bivariate choropleth maps. I'm not sure, though, how to import the toolbox and the other files so that I can use ...
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: ...
2
votes
1answer
98 views

Is it possible to create a dynamic map in QGIS?

My table looks like this: I’ve already done a Choropleth map with the first attribute of my table. I would like to do the same Choropleth map with the rest of my attributes. I can’t replicate it ...
2
votes
1answer
83 views

How to normalize choropleth maps of startups by state?

I want to display on a choropleth map the startups of a particular domain that operate in that state. I have a count of startups by state. How do I normalize so that the map is not represented ...
2
votes
1answer
2k views

Creating a World Population Density Map

I am trying to make a world population density Choropleth map (country level). The data I am using is publicly available on World Development Indicators website. Pretty much, I have an excel file ...
2
votes
2answers
362 views

How do you make an unclassed choropleth in QGIS 2.x?

How do you make an unclassed choropleth in QGIS 2.x? I'm using 2.4 and can't find an option in a layer's Style tab like the continuous color option that seems to have existed in QGIS 1.x. I'm curious ...
2
votes
1answer
82 views

Is there demand for a service to publish web maps with lots of shapes? [closed]

Is anyone in the GIS community trying to publish choropleth web maps with a large (10s to 100s of thousands) number of polygons? and if so what's your current approach and what are the shortcomings of ...
2
votes
1answer
131 views

Table Join only returns first record from CSV table in QGIS 3.0.3

I have a .csv file that contains instances of hospitalization with diagnosis codes and zip codes and I want to join it to the corresponding polygons in the TIGER 2017 zcta510 shapefile. Every time I ...
2
votes
1answer
775 views

When joining tables, style of vector layer can't find new column in QGIS

When I joined a csv file with the attribute table of my vector label everything's cool. Now, when I open the attribute table of the vector layer I can see that I successfully added the new designated ...
2
votes
1answer
70 views

Automatic selection of colored regions when digitzing choropleth maps

I am new to working with GIS. I have a raster choropleth map similar to the one displayed below. I want to create a shapefile from the map, where each layer contains all the countries that have the ...
2
votes
3answers
4k views

Choropleth map with GeoPandas and Folium error

I am trying to generate a leaflet Choropleth map as in https://pypi.python.org/pypi/folium. I am importing a shapefile as a geoDataframe which later on I am converting to a json file that I can ...
2
votes
1answer
274 views

Automating Choropleth map creation from table in QGIS?

I am trying to create soil nutrient maps from an excel table. My table has the location with multiple nutrients for each location (Nitrogen, Potassium, pH etc). I would like to create a choropleth map ...
2
votes
1answer
1k views

How to make Choropleth map using Openlayers 3?

I want to make Choropleth map in Openlayers 3 which is already implemented in Leaflet but not in Openlayers 3. how to integrate 'colorbrewer' in Openlayers 3? Give the working example of it.
2
votes
0answers
68 views

Making animated choropleth with ArcGIS Pro

I want to make an animation that shows the changes in state shape and state population every ten years. My state data is all in one large feature class. I have a polygon for each state every ten years,...
2
votes
2answers
72 views

Getting selected column/field for graduated color via expression or other routine in QGIS?

I have choropleth map with graduated colors. The column - the field name - that I choose to define the classes and the colors is important for my work on the maps. Is there a method to make it visible ...
2
votes
1answer
258 views

Clustered choropleth map using CARTO?

I have a set of field measurements for a bird species (pitch of its song) along with coordinates for each measurement. The default choropleth style in CARTO works perfectly for showing how the pitch ...