Add About Vegetation (Percent Tree Cover) - Global version - Version 2 example

[tkoyama010]

✨ Feature Request

Motivation

I found Vegetation (Percent Tree Cover) - Global version - Version 2
It is an excellent example of plotting by Geovista.

Additional Context

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Please provide additional verbose information here e.g., references, screenshots, listings etc

See https://globalmaps.github.io/ptc.html#use

[github-actions]

In order to maintain a backlog of relevant issues, we automatically label them as stale after 180 days of inactivity.

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[github-actions]

In order to maintain a backlog of relevant issues, we automatically label them as stale after 180 days of inactivity.

If this issue is still important to you, then please comment on this issue and the stale label will be removed.

Otherwise this issue will be automatically closed in 28 days time.

[tkoyama010]

This is still important.