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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54 views

Adding scaled location labels in QGIS

I currently am working on creating a choropleth map of population redistribution data, and would like to stack three layers on top of each other. First, a simple basemap-- I chose to use a Cartro ...
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21 views

Making a choropleth map from zonal statistic in GEE

I have counted pixels with NDVI more than 0.2 for each polygon in a shapefile. Now I want to create choropleth map showing counts of pixels in each polygon. I want to how to create choropleth map ...
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Creating Choropleth Map using points in ArcGIS Pro

As seen in the picture, the purple/yellow points represents yes/no, and the location of the points are based on home locations of the respondents. In ArcGIS Pro I would like to create a choropleth ...
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1answer
41 views

How can I create a Choropleth by combining a polygon GeoPanda with a point GeoPanda?

I have two GeoPanda dataframes, one with the location of shops with point coordinates in the geometry column, and one with London boroughs with polygons in the geometry column. My usual approach with ...
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1answer
416 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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48 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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128 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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21 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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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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28 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
130 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
482 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
1k 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
99 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
843 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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151 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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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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33 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
122 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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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
181 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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510 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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271 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
608 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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2answers
128 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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22 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 ...
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297 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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1k 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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2answers
134 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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0answers
45 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
228 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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1answer
69 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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238 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
789 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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167 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
241 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
208 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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0answers
547 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
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
2k 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
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
1k 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
108 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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0answers
320 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 ...
2
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1answer
317 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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1answer
845 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
108 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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1answer
635 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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0answers
190 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 ...