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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95 views

Developing shapefile (SHP) for location from scratch [closed]

I am working on a research problem for a location for which geospatial vector data does not exist. This means I have to create one from scratch so that I can create shapefile data for this location. ...
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1answer
1k 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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1answer
91 views

How to get a Folium layer to display on top while not stopping lower layers highlight functionality

I'm trying to create a Folium map where the top layer is a boundary plot (fill_opacity: 0) of coarser structure to the Choropleth on the bottom level. I'd like the coarser level with no highlight ...
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3answers
6k 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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880 views

Python - Issue to create choropleth map based on GeoJSON file: AttributeError

I'm trying to build a choropleth map, I cannot figure out why I get this error: AttributeError: 'NoneType' object has no attribute 'get' Here is my code: station_nb is a dataframe with values ...
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357 views

Python plotly choropleth does not work with GeoJSONs

I am trying to use plotly choropleth to draw the map, lets say for a random variable of num for each of the feature regions of the map in Italy. However, it does not work. below is the code that I use:...
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37 views

How to overlay and combine a choropleth and a shaded raster in Python?

I want to make a choropleth map of regions but shade it according to local population density. This is not the problem of masking a raster with a shapefile but to overlay two representations of data ...
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424 views

Specifying legend location in folium

I have a few choropleth maps in one Leaflet map using folium. However, in my output, my legends all congregate underneath one another and on one side where it blocks the 'control zoom' icon. Is there ...
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25 views

How do I create Map with regions from Scratch

I wish to create choropleth map in R (or any other program). The map I want to use cannot be found, hence I must create one from scratch (will use photo of map from 1800s). This involves 1- ...
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1answer
48 views

Sources for population density map of Europe

I want to make population density map for EU where I can show populations of people aged about 65yrs, where can I get a EU shapefile and population Excel file? Is there any EU shape file available ...
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17 views

Joined attribute not visible in categorized symbology

I am having an issue selecting a joined layer in the 'value' dropdown under graduated symbology to create a choropleth map. I joined originally the data from a csv file, but after I encountered this ...
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1answer
128 views

Advice on normalizing census data in choropleth maps

I'm trying to figure out the best way to normalize census data in two choropleth maps showing the population of people with hearing loss. Their geometries: The states of the United States. The ...
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1answer
163 views

Missing values for Choropleth Map in QGIS

I am creating a Poverty Choropleth from a vector file using polygons to represent each county in the United States. I joined the poverty Excel file with a text file to convert the poverty column from ...
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165 views

Folium choropleth plots markers [closed]

I have this code to plot a choropleth from a GeoPandas DataFrame. def create_gpd_dataframe(self d = {'Angle of point': yard_list, 'Latitude': yard_lat_list, 'Longitude': yard_lon_list} ...
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465 views

Python, Folium choropleth, plot by value

I have a GeoPandas dataframe: self.geopd = gpd.GeoDataFrame(df, geometry=gpd.points_from_xy(df.Longitude, df.Latitude)) Angle of point Latitude Longitude geometry 0 ...
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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)....
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2answers
123 views

Apply external choropleths in QGIS 3

I have a large number of cloropeths stored in SLD and QML formats. QGis is unable to apply any of those, there is no option in the GUI for SLD, whereas it fails to apply QML files correctly. Is there ...
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1answer
435 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 ...
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20 views

ArcMap 10.6 Choropleth Banding

We have ArcMap 10.6 at work, and would like create choropleth maps to visualize the the change in profit (%) that adjusting different business variables would have. **Note that the actual change in ...
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1answer
78 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 ...
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1answer
495 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. ...
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1answer
257 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
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 ...
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0answers
199 views

Mapbox choropleth map without the in-between colors?

I am new to Mapbox and love the simplicity of creating choropleth maps with stops, and while I prefer the way Mapbox colors each polygon relative to where the value falls between stops by blending the ...
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2answers
104 views

How to visualize choropleth with temporal component in browser

I have a vector dataset with monthly water risk data per river basin. The data is available for each month (January - December) and I would like to visualize this in a browser. The geometries are ...
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3answers
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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 ...
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2answers
8k 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 ...
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1answer
2k views

Displaying properties from GeoJSON file in choropleth map using Leaflet.js?

I'm using the Leaflet.js library to generate a choropleth map of zip codes colored by some property values stored within an externally loaded GeoJSON file. I'm following a tutorial here but have run ...
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0answers
41 views

Conditional graduated styling in QGIS [closed]

I want to make a choropleth map from Census data, where my table structure is similar to the below, but I want to create a graduated style for the population based on a particular Country of birth (e....
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1answer
451 views

Seeking free tool to make choropleth map with administrative borders?

I have a numeric table for some administrative division like county, state, province, oblast. Is there a free tool that I can supply with my table and get a choropleth map?
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196 views

Making 3D choropleth map in QGIS 3 with native tools?

This is similar to this question Is it possible to draw a 3D Choropleth Map in ArcGIS?, but I just wanted to know if the same could be done with the new release of QGIS 3 without the use of the ...
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1answer
257 views

Building choropleth map using D3.js? [closed]

I want to build a Choropleth map, from a specific region (in my case Portugal) with D3.JS and while searching for tutorials and support, I have found this website. Following the procedure, I have ...
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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'...
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1answer
58 views

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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907 views

Trying to Create a Global Choropleth Population Density Map then add Biodiversity Level

I am trying, quite unsuccessfully, to create a global choropleth population density map for a specific 120 countries, using ggplot2. Once I have created this choropleth map, I want to add number of ...
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1answer
1k 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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1answer
650 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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1answer
97 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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0answers
132 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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0answers
217 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
60 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
189 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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1answer
2k 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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0answers
498 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
333 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 ...
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1answer
1k 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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1answer
449 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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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 ...
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1answer
50 views

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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2answers
676 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 ...