Area estimation from multiple land cover product

[adebowaledaniel]

The src/compare_covermaps module already provided all necessary functions and classes to support area estimation from multiple land cover maps. However, there is no provision to select maps available for a year of interest, which is important for crop area estimation. So, I modified the module and updated the intercomparison notebook template to include the area estimates in the PR.

• [X] Add year variable to the Covermap class. This is needed to select land cover maps available for the reference year and add year attributes to each map in the module.
• [X] The major updates in the notebook are filtering maps with the year attribute, CEO reference sample agreement, and area estimation compute function.
  • [X] Select maps ±2 years of the reference year.
• [X] The number of pixels for the DynamicWorld dataset returns a None array due to EE computation timed out. [Temporarily fix] - I changed the None array to nan to avoid errors in the notebook.
• [x] Run the area estimate for Kenya and Senegal
  • [X] Include FAOSTAT - cropland area

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[hannah-rae]

@adebowaledaniel It seems like the goal of this PR is similar to my other PR #374. Have you reviewed that PR already? Can you comment on how the goals of this are different from that PR, or do you see this as superseding the other PR?

[adebowaledaniel]

@hannah-rae, The primary goal of this PR is to get the area estimates of a reference year from all the land cover products available for that year, including the ones ± 2 years. So, my focus was on the area estimation. I didn't notice #374 until I finished this draft. I suggest we complete and merge #374 first. Or integrate both PRs since this has an extra layer for area estimates.