Podcast #128: We chat with Kent C Dodds about why he loves React and discuss what life was like in the dark days before Git. Listen now.

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.

Filter by
Sorted by
Tagged with
2
votes
1answer
276 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 ...
9
votes
1answer
5k 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 ...
1
vote
1answer
456 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. ...
3
votes
1answer
855 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 ...
1
vote
0answers
57 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 ...
2
votes
1answer
70 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 ...
3
votes
2answers
4k 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 ...
17
votes
1answer
462 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. ...
2
votes
1answer
275 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 ...
1
vote
1answer
253 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 ...
0
votes
0answers
53 views

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 ...
-1
votes
1answer
391 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?
1
vote
0answers
403 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 ...
2
votes
1answer
414 views

How to implement 4D Choropleth Map using cesiumjs?

I want to implement 4D Choropleth Map on cesiumjs. Anyone know how to do it and show me the code?
2
votes
0answers
720 views

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....
1
vote
1answer
428 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....
2
votes
1answer
83 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 ...
2
votes
1answer
1k views

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.
3
votes
1answer
780 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; } #...
2
votes
2answers
1k views

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: ...
1
vote
1answer
476 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 ...
0
votes
1answer
46 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 ...
3
votes
1answer
670 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 ...
4
votes
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 ...
5
votes
1answer
3k views

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 ...
3
votes
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 ...
2
votes
1answer
2k views

Creating a World Population Density Map

I am trying to make a world population density Choropleth map (country level). The data I am using is publicly available on World Development Indicators website. Pretty much, I have an excel file ...
2
votes
2answers
362 views

How do you make an unclassed choropleth in QGIS 2.x?

How do you make an unclassed choropleth in QGIS 2.x? I'm using 2.4 and can't find an option in a layer's Style tab like the continuous color option that seems to have existed in QGIS 1.x. I'm curious ...
0
votes
0answers
931 views

Is there a way to have a choropleth map in Excel reading data from a sheet?

Is it possible to have a solution similar to ESRI maps for office in which I want basically a geojson file or any file for that matters to render a choropleth map based on data in a sheet? Tried ...
1
vote
1answer
377 views

Associating location data from PostGIS for a Choropleth map?

I'm trying to build my first choropleth map from data that we have stored in our PostGIS enabled Postgres database. So far I've been able to build a map on Mapbox using a topojson set of UK postal ...
1
vote
1answer
1k 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 ...
4
votes
2answers
7k 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 ...
0
votes
1answer
388 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 ...
4
votes
2answers
3k views

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 ...
2
votes
0answers
92 views

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.
3
votes
0answers
237 views

R - how to create a pre-determined number of identical square polygons to use for a choropleth map?

I am trying to plot crime data density (again!) over a city map, say of NY. As a well known problem there are plenty of examples on this (http://www.obscureanalytics.com/2012/12/07/visualizing-...
1
vote
0answers
842 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 ...
1
vote
0answers
261 views

Which bins should be used for demographic data for a choropleth map?

I'm currently working on a project which produces a choropleth map similar to a map like this: http://dl.dropboxusercontent.com/u/54512470/Telefondaten_VIZ/index.html That map has 2x5 classifications ...
1
vote
1answer
371 views

Overlap or intersect two choropleth [closed]

I have two choropleth of the same area but with different concentration data and I need to overlap them. My aim is to highlight the areas of intersection between the points with the highest ...
0
votes
1answer
92 views

Choropleth map turns one color when filtered, sql error

My data is generating a choropleth map perfectly but when I try to filter (both in the filter tab and by writing my own SQL) it turns all one color and tells me I have an SQL error. This happens even ...
10
votes
2answers
1k views

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, ...
4
votes
2answers
1k views

How can I create a choropleth from the 2010 census ZCTA shapefile using R and ggplot2?

I have created state and county choropleths in R using ggplot2. The method I have used for this came from Winston Chang's "R Graphics Cookbook". For those choropleths the map was already represented ...
8
votes
3answers
2k views

Should I use a discrete or continuous scale for coloring a chloropleth?

I am making a choropleth for an upcoming local race using D3. There are two candidates running for an election. For any given polygon on my map, if the red candidate has more votes, the color should ...
2
votes
1answer
82 views

Is there demand for a service to publish web maps with lots of shapes? [closed]

Is anyone in the GIS community trying to publish choropleth web maps with a large (10s to 100s of thousands) number of polygons? and if so what's your current approach and what are the shortcomings of ...
4
votes
1answer
1k views

Choropleth Mapping Using Quantile Method in CartoDB

Does anyone know how CartoDB calculates the buckets for a choropleth map using the quantile method? My understanding of choropleth maps that use the quantile method is that they will assign an equal ...
3
votes
1answer
1k views

leaflet choropleth map using dynamic value

I am doing a choropleth map using leaflet and JSON data. I got a clean tutorial in leaflet site. In that tutorial the used us-states.js JSON file where the choropleth was based on the feature....
1
vote
2answers
684 views

County-Level Ethnic Shapefile: United States

My professor usually provides the shapefiles that we deal with in our analyses of the United States--population, votes, etc., but I'd like to know how I can get these myself. I'd like, in particular, ...
2
votes
2answers
245 views

Choosing intervals for a map of race in the United States

I'm creating an open map layer of race in the United States using Census Data. This layer will be publicly available in the near future as "Justice Map". The goal is to help others create maps using ...
3
votes
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 ...
4
votes
1answer
2k views

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 ...