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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Field values missing from quantity symbology options in ArcMap?

I am using ArcMap. I joined table data to the latest TIGERLine tract shapefile for my county and exported the data. When I attempt to create a choropleth/thematic map, many of the fields in the ...
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455 views

Zooming into State

I am using R LeaftLet package to create a interactive choropleth of the US Map. Now my question I want both in one map itself but make zip code visible as I zoom in a state or double click on a state....
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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 ...
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QGIS Grid Union Issues

I am trying to create a choropleth map of ice concentration over Lake Erie. I have data for all the lakes (I can clip it all at the end), which are in a point shapefile. I have laid a grid over the ...
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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 ...
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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 ...
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1answer
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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 ...
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2answers
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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 ...
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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 ...
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1answer
2k 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 ...
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308 views

Labeling Counties in R Choroplethr

I am trying to label counties using choroplethr. Some posts on the topic exist but do not detail sufficiently how this is done. My reproducible example/code follows. How would I change my code so ...
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307 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 ...
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763 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 ...
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1answer
562 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 ...
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180 views

Automating QGIS Choropleth Maps Using PyQgis

I have maps (shapefiles - vector layers) of several states' school districts, appended to a federal dataset containing the same variables for each state's districts (in the attribute table). I want to ...
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69 views

Standardizing number of jobs and sales per state for choropleth map?

I want to show the change in jobs and sales per state from 2006 to 2015. Since I will be making a choropleth map, does this mean that I need to normalize the job and sales numbers before I make the ...
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281 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 ...
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1answer
584 views

Count points in polygon by attribute column for making choropleth

I have a point shapefile of complaints for NYC. I also have a polygon shapefile of community district boundaries with an attribute column for the community district number. Is it possible to count ...
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How do you create a map that has choropleths that will change with a timeslider? [closed]

I have data for different countries over time that I would like to display in a choropleth map with a time slider that plays automatically on click. What is the best way to do this.
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102 views

Reduce space in between subplots containing choropleth maps

(I posted this on Stackoverflow, but thought this may be a better venue) I am trying to generate a figure containing six choropleth maps in R. Currently my code looks something like this: library(...
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403 views

How to create a cloropleth world map in ArcGIS 10.2

I am new to ArcGIS and I am trying to create a choropleth map to display ratio values for different countries. I believe that my basemap will need to have a country layer so that the shading of ...
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1answer
728 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 ...
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Deciding on classification method and number of classes for mean temperature

I'm trying to decide on the classification method: natural breaks, equal interval, quantiles, or manual and the number of classes for a map showing the mean temperature of places in Canada. The ...
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1answer
140 views

Choropleth plotting boundaries in gray

I'm using R and am trying to create a choropleth map using GISTools. My code is like: choropleth(us_state, us_state$smallbiz1998, shades) plot(us_interstate, add = TRUE) us_state is a map of US ...
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399 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 ...
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Custom cuts using R and `choropleth` in package `GISTools`

I am plotting some data on a shapefile using R and choropleth in packageGISTools I would like to modify my code below in order to assign custom breaks. Using the World Borders Dataset, download from: ...
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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 ...
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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, ...
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210 views

Create Choropleth Style Map in CartoDB programmatically

I am trying to create a choropleth map for a school project I am working on. Based off user input, I will create a csv file that I will then upload to CartoDB using their Import API. By setting the ...
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1answer
330 views

Add Links to Leaflet Choropleth Map

I'm making a choropleth map based on this example I would like to add links to the map, so that when a user clicks on a state they will be taken to a specific page. For example, a user clicks on ...
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531 views

How to create a choropleth map from a very Large geojson using Openlayers?

I am trying to create a choropleth map using OpenLayers 2 api from a Geojson file that has a size of about 229 mb. I have used the mapshaper tool to simplify the polyogns in this json to about 19 mb. ...
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1answer
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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 ...
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geoserver sld color gone in zoom out [closed]

I badly need help... I have a layer served from geoserver, this layer is in polygon.. and in every polygon the color varies according to a number. so it is like a choropleth map. now my problem is ...
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1answer
80 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 ...
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1answer
908 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 ...
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1answer
741 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 ...
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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 ...
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1answer
255 views

Choropleth in Cartodb with lat and long of countries

I have a dataset in Cartodb with the following columns: Name,Count,Lat,Long When I upload the dataset, Cartodb automatically update the column Geometry with the Lat and Long. The Lat and Long in my ...
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How to join CSV data (based on admin boundary names) to shapefile of aforementioned boundaries in R? [duplicate]

DATA: CSV data, Shapefile Hi all! I'm looking to perform what I've been taught is called a spatial join. After researching this further, it's looking like this operation is most often called a ...
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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 ...
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417 views

QGIS choropleth map

In QGIS, when I change from single symbol to a graduated style, the map "disappears." When I change it back to single symbol, the map "reappears." The issue doesn't appear to be the scale, since it ...
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1answer
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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 ...
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1answer
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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.
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Different Leaflet fillcolors for different layers

I have a leaflet map set up with two layers and I want them to use different colorization functions to color the choropleth shapes. My shapes are set up in layers like this: var povertyLayer = L....
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2answers
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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: ...
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1answer
93 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 ...
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1answer
811 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; } #...
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1answer
501 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 ...
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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 ...
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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 ...