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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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Choropleth boundary colour change in QGIS?

How do you change the colour of the boundaries between areas on a choropleth map in QGIS 2.18 Mac version?
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20 views

Highlighting map areas through map legend using Leaflet?

I would like to highlight different areas on a choropleth map when the mouse over the legend using Leaflet, but my code is not working: <head> <meta charset="UTF-8" /> <meta ...
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26 views

Interactive legend choropleth map

I am working on a choropleth map, I would like to build an interactive legend, so when mouse down the legend the correspondent objetcs on the map would turn on. Any suggestions? <head> <...
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35 views

leaflet display geoJson just a like a line

I am trying to construct a choropleth map with leaflet, when I execute the script, just a line is displayed. What can be wrong? <!DOCTYPE html> <html> <head> <meta ...
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43 views

Can you create a 3D choropleth map in QGIS 3 with native tools?

This is similar to this question, but I just wanted to know if the same could be done with the new release of QGIS 3 without the use of the QGIS2threejs plugin. I am hoping this is possible so I can ...
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206 views

Choropleth map from voronoi map from a set of coordinates (d3+leaflet)

I have a csv file with a set of coordinates with the following structure: id,name,latitude,longitude (24 values). Those 24 points represent coordinates in a city. I would like to get a voronoi map ...
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34 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,...
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91 views

Making a choropleth in D3 by intersecting a MultiPolygon and a Point GeoJSON

I am trying to generate a choropleth map showing crimes per neighborhoods: I have a layer showing the neighborhood boundaries of the city of San Francisco, and point data showing incidences of crime ...
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1answer
82 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 ...
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286 views

How to fill the color in choropleth map in absolute value?

Problem I am planning to publish an article about 'how many votes are counted in each region' every one hour after the June election in Korea is over at 6 p.m. So at 7 p.m., at 8 p.m., at 9 p.m.,...
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1answer
208 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 ...
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118 views

Folium Choropleth Doesn't Display with External Esri Services

Building off of the post I have here I am attempting to move on from the use of a local geojson and now combine two external geojson files in a folium choropleth map using Jupyter Notebook. I am ...
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506 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:
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135 views

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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183 views

Applying resetStyle on multiple geojsonlayers in Leaflet?

I followed the tutorial of leaflet but i want to make it with multiple geojson layers or any layer. Here is the code function resetHighlight(e) { map.resetStyle(e.targer); } function ...
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1answer
361 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 ...
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2answers
62 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 ...
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208 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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1answer
204 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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386 views

ggplot colour fill takes too long or crashes

I am working with some large shape files and want to find the best way to produce filled choropleth maps of the UK. My starting shape is a 'Large SpatialPolygonsDataFrame of 404 elements. This is a ...
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1answer
381 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
68 views

Normalizing election voter data for choropleth?

I would like to create a choropleth that shows eligible voters per constituency. This data is in raw count. How do I normalize the data in this case? My intention is to show the difference in ...
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1answer
297 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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102 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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1answer
44 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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1answer
59 views

Use of US Census data to plot house value range

The house value data from the US Census Bureau is provided as a table differentiating areas into census tracts. My understanding is that they categorize each tract into quantities of homes fitting ...
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1answer
183 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
369 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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1answer
56 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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84 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 ...
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1answer
417 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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2answers
181 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 ...
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0answers
46 views

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
100 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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1answer
3k 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'...
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1answer
707 views

MapBox GL API: Add 'property' to 'source' to update map feature colors with dynamic data

SUMMARY: I need to color code lines based on information not attached to the dataset in the style. How do I do this? Below is a suggested path, but apparently it may be the wrong direction to solve ...
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3answers
2k 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 ...
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1answer
242 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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0answers
325 views

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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1answer
1k 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 ...
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1answer
963 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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1answer
175 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
185 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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1answer
4k 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 ...
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1answer
366 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
734 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 ...
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0answers
47 views

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
57 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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2answers
3k 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 ...
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0answers
356 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. ...