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Brazil soy silo decision tree

This folder contains the code used to produce the silo dataset which will soon be published on the trase.earth logistics map.
The general idea of this decision tree is to select only the silos that are exporting soy, using mainly the Customs Declarations as the trade data source. It has three steps which are as follows:

• 1-br_create_silos_map_dt - Identifies likely soy silos from SICARM and CNPJ datasets following the logic laid out in brazil_silo_dt.txt (agreed by Ben and Javier).
• 2-br_create_silos_map_spatial - Find the location of these assets through reference to the SICARM and CEP databases. Failing both these options the municipality centroid is assigned.
• 3-br_create_silos_map_consolidate - Final cleanup, add date of establishment from CNPJ database, assign categories (confirmed / unconfirmed).