What is mangrove, mangrove_1km, mangrove_offshore?

[jules32]

For global assessments, we use mangrove data from global raster data, and process it in a several different ways to use for three goal models: CS, CP, HAB (read more about data processing for extent, health, and trend here).

If you look at one of these layers, e.g. hab_mangrove_extent, you will notice three different habitat types:

• mangrove_inland1km
• mangrove_offshore
• mangrove

What does this mean?

These distinctions stem from two things: the goal model philosophies and the quality of the available data.

Data-quality-wise:

• mangrove_inland1km is calculated by clipping the global raster file 1-km inland (land-wards) from the high-tide line for each region.
• mangrove_offshore is calculated by clipping the global raster file from the high-tide line (ocean-wards) to the EEZ boundary.
• mangrove is calculated from all mangroves within the EEZ. This includes inland1km, offshore, and any other mangroves that were somehow not included in the previous categories.

Philosophically,

• Coastal Protection should only include mangroves that can protect the coastline. So this means only the layers including data from land: "mangrove_inland1km" and "mangrove_offshore".
• Carbon Storage and Habitats can include mangroves from anywhere in the EEZ, since it doesn't need to be limited to the shoreline to be relevant: "mangrove"

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For OHI+ assessments, it might not be necessary or possible to distinguish inland1km from offshore – and that is OK. Depending on how data are collected and reported, you may use the same data for all three goal models, and tailor the goal models accordingly.