Template:Choropleth world map/doc

Usage
This template creates an interactive world choropleth map, indicating some statistical value with different colors for different countries. A tooltip with country data is shown when the mouse is over a country.

Dataset format
The dataset should be stored at Wikimedia commons, in the Data namespace, as a tabular data (.tab) file. Currently, the file format should be JSON, representing a three column table, where the first column is the three-letter ISO country code, the second is the year and the third is the value. In the future, CSV-files may be possible.

Steps:
 * Download a .csv file, for example from https://ourworldindata.org
 * Trim to three columns in a spreadsheet program
 * Upload it at https://www.csvjson.com/csv2json . Select "parse numbers".
 * Copy the json output and paste it into Notepad. Find and replace { with [, and "Country:" with nothing
 * Paste this data below the heading data, at for example [:commons:Data:Child Mortality.tab]

Be aware of some minor bugs.