add legends to map exporter

[danangmassandy]

This is for #2085. Preview:

[lgkgh]

Jenkins Build Details:

Build status: SUCCESS Build duration: 13 min

[github-actions[bot]]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
17061	16560	97%	0%	🟢

New Files

No new covered files...

Modified Files

No covered modified files...

updated for commit: 4a811cd by action🐍

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 97.26%. Comparing base (5ffb9a8) to head (4a811cd). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2096 +/- ## ======================================= Coverage 97.26% 97.26% ======================================= Files 375 375 Lines 16863 16863 ======================================= Hits 16402 16402 Misses 461 461 ```

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[lgkgh]

Jenkins Build Details:

Build status: SUCCESS Build duration: 2 min 58 sec