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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1answer
38 views

Folium draw polygons with distinct colours

I have trouble with my assignment. I have to draw over 100 polygons from the xml file and every of them has to have other color. I don't know how to accomplish it. First I tried to draw polygons in ...
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1answer
301 views

How to add data slider bar control to Folium maps

I am making a choropleth map in Folium which displays data for certain age brackets. I would like to add a double ended slider letting users select the bottom and top of the age range to view. The ...
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1answer
34 views

How to programmatically create a bivariate choropleth in d3.js?

Question and Situation I'm using d3.js to visualize some data on a map. The user clicks on one checkbox and all path elements get filled according to a color-preset, which all works fine. Now what we ...
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27 views

How to identify correct key_on parameter from JSON file for Folium Choropeth

I'm trying to make a Folium Choropleth map. But I'm stuck for long time on completing it. My map shows boundaries correctly, even shows legend correctly but the map is not filled with choropleth ...
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15 views

GeoServer chloropeth style

There is a default chloropeth map in GeoServer: Is there a way to style a Choropleth map based on Four_color_theorem so the adjacent sides would always be different colour?
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2answers
61 views

How to make QGIS Categorical Symbology Classify only the values that are present (i.e. not provide a category for “All other values”)?

I am making a choropleth map to show the value, for each polygon, of an ordered categorical variable (a decile, in fact). So, each polygon already has a specific singular value of this variable, ...
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27 views

Choropleth Map: data source by location name (without geometries)

I am interested in creating a choropleth map using Mapbox, while the data source I have in hand is built only from the location name and the "intensity" value. i.e.: [{"country": &...
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1answer
448 views

How to implement 4D Choropleth Map using cesiumjs? [closed]

I want to implement 4D Choropleth Map on cesiumjs. Anyone know how to do it and show me the code? (source: cesiumjs.org) (source: cesiumjs.org) (source: cesiumjs.org)
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1answer
89 views

Remove Existing Choropleth Map Layer, Legend and Info Div Before Adding a New One in leaflet “map.removeLayer()” is not Working

I followed the “Interactive Choropleth Map” tutorial for leaflet, available here(https://leafletjs.com/examples/choropleth/). Then I put all the things in a function, and I am calling that function on ...
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1answer
532 views

How to change circle opacity in Folium?

I made my first choropleth map using Folium which worked quite well! However I would like to change the opacity of my circles to be a bit more opaque. How does one do this? There does not seem to be ...
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1answer
97 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
603 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
7k 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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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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478 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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0answers
118 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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0answers
1k 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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0answers
32 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
100 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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0answers
20 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
172 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 ...
2
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1answer
208 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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0answers
251 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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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
127 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 ...
2
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1answer
576 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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0answers
21 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
84 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 ...
17
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1answer
498 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. ...
3
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1answer
386 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 ...
4
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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
269 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
122 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
20k 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 ...
4
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2answers
9k 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
43 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
461 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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0answers
229 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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2answers
6k 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
66 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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0answers
924 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 ...
4
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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
714 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
104 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 ...
3
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0answers
158 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
232 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 ...
2
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1answer
205 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 ...