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OcelotProject / Ocelot

Ocelot is open-source linking for life cycle assessment. See https://ocelot.space/ for more information.
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Incorrect `RoW` market shares for freight train transport #157

Open cmutel opened 5 years ago

cmutel commented 5 years ago

In the dataset market group for transport, freight train (GLO), we get a non-zero PV in the ecoinvent release:

screen shot 2019-01-16 at 13 39 25

cmutel commented 5 years ago

Ocelot is doing the logical thing here, but this is perhaps not what the reference system expects. The problem is that the definition of RoW in market for transport, freight train excludes the USA (which has its own market). However, the reference system wants to link to transport, freight train, electricity in RoW. However, this is a different RoW, which excludes only Switzerland, China, and Europe without Switzerland. The market linking algorithm only allows links for market suppliers which are contained within the market location. And the RoW for transport, freight train, electricity includes the USA, and so is not contained in the RoW for market for transport, freight train.

cmutel commented 5 years ago

Comment from Ingo Meinshausen (email from 4.2.2019):

RoW is not resolved per dataset. I.e. the linking process does not know which specific locations are contained in each RoW. With regard to spatial operations RoW never intersects other geographies.

RoW never intersects anything else, not even another RoW. GLO contains everything but RoW. But keep in mind that the market supplier linking works different for RoW DS! Their suppliers are not gathers by spatial operations but by using suppliers that are not supplying local markets. If none of those exist the supplier with the largest PV will be chosen.

Should be functionally similar to doing the "right" thing in most cases, but not here. Happy happy fun times!

cmutel commented 5 years ago

This particular problem was resolved in 6b61152548d29b83e02a6db14bd092d6df8a459f, but some issues around this topic remain.