Analysis: retrieve size breakdown of ecosystem group layers for custom or predefined area

[tmfrnz]

As a public user, I want to be able

• to retrieve a list of ecosystem group layers for a custom area or a predefined area, including the percentage (and/or absolute size) of the area that each group occupies (grouped by minor and major presence)

so I better understand the presence and distribution of ecosystem groups at an area of interest

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The required interactions are

• select type of analysis (custom area, predefined area, current map extent)
• draw on map to create custom area (could be rectangle or polygon)
• select a predefined area from one or more types of predefined area (e.g. cultural or political regions)
• likely add any layer to the map (see #1) or get additional info (see #2)

[tmfrnz]

Update: do to performance issues it was decided for now to

• [x] use pre-calculated areas for predefined regions
• [x] not calculate areas for predefined regions

[tmfrnz]

• [x] show relative area where available instead of total area

[tmfrnz]

@sylvhay @jrfep do you have any preference for sorting the result list?

Currently results are ordered by

1. Realm Type (core > transitional)
2. Realm Id (alphabetically, so eg F > M > T > S. Note that this is different from the Explore overview page where we are ordering Realms by no of Biomes)
3. Biome No
4. Group No

However we could alternatively also consider the "relative area" (eg the larger % of major or minor)?

[sylvhay]

@tmfrnz sent this Q to the group, prefer as it is, although if you can easily order Realm ID in the same way as Explore that might be better?

[tmfrnz]

@sylvhay this should be quite easy to do - alternatively we could also simply specify a set order for these realms that you may prefer that is not based on the no of their biomes