That would be at 10-degree latitude. unlike at 0 degrees, the land mass area at this latitude is smaller and this region is tropical where there is an abundant all year round exposure to sunlight unlike the temperate regions between the 30-70 degree.
I think if its bulk reducing it needs to be placed near the consumer. Bulk gaining needs to be put near the inputs for the product. ALSO for the one one top Weber says its the location of raw materials, location of market, and transportation cost