https://bugs.documentfoundation.org/show_bug.cgi?id=160398

Stéphane Guillou (stragu) <[email protected]> changed:

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--- Comment #3 from Stéphane Guillou (stragu) 
<[email protected]> ---
Created attachment 193371
  --> https://bugs.documentfoundation.org/attachment.cgi?id=193371&action=edit
sample XLSX with choropleth chart created in MS Office

This simple choropleth map was created with MS Excel (desktop). Note that it
needed to send data to Bing in order to create it, so not everything is done
locally.

When opened in LO, the chart is replaced by the generic placeholder "This chart
isn't available in your version of Excel".

No idea how such a chart is defined in OOXML, but supporting displaying it
could be a separate ticket to supporting the creation / editing of such charts.

I note that dealing with spatial data is quite the challenge.
In my opinion, as a minimum, an implementation of a new chart type would have
to support:
- inclusion of a generic global shapefile of state borders (which might bring
in some geopolitical/cultural debate) - could be from Natural Earth:
https://www.naturalearthdata.com/
- sensible detail level of such a shapefile, with rendering adapting to
different zoom levels
- at least two chart types: choropleth and point/circles
- automatic matching of country names or codes to the features in the shapefile 
- recognition of lat/lon coordinates for point data
- styling of borders, fills, points...
- set of discrete and continuous colour scales to choose from
- a small set of projection options
- labeling of features (e.g. country names on or off)

And all that preferably online.

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