[DATA] Add gridded GDP data

[JinIgarashi]

Issue Description

We can add this gridded GDP raster data to geohub

References

https://zenodo.org/records/5880037

Dataset ID

No response

Screenshots

No response

[iferencik]

This dataset is very generic and developed at/for a small scale rater than lager one. In general it is very complicated to disaggregate GDP spatially because of its social nature. The reality is every piece of usable land contributes to GDP directly. All the land contributed to GDP indirectly (recreation value of forests, air cleaning capacity contributes to improved health, etc). This effects are not really accounted for in GDP, hence the reluctance to sue this dataset