Agricultural field boundaries produced by Trazo models for key geographies in South America for the 2023-2024 planting season. Post-processed.
# Trazo2 Field Boundaries — Brazil & Paraguay (2023–2024)
> Agricultural field boundaries for five Brazilian states and Paraguay, delineated from
> Sentinel-2 imagery by the Trazo2 model. WRI / Arizona State University, CC-BY-4.0.
Part of the [Trazo catalog](../catalog.json). Trazo2 is the **best evaluated and characterized**
model in the suite: 76.27% pixel IoU on Mato Grosso, 76.05% on SA Soy, 66.61% on Chiquitania.
Trained on the full global Fields of The World dataset plus all 17 South American soy ecoregions
and partner data, with rebalanced class weights (0.75 boundary / 0.05 background / 0.20 interior),
LR 0.003, up to 300 epochs with early stopping.
[Model card](https://huggingface.co/worldresourcesinstitute/Trazo2).
For broader geographic coverage use [trazo3-fields](../trazo3-fields/).
## Files (7)
Named `{country}_{region}_2024.parquet`, directly in this collection:
- Brazil: `brazil_goias_2024`, `brazil_para_2024`, `brazil_piaui_2024`,
`brazil_sao_paulo_2024`, `brazil_tocantins_2024`
- Paraguay: `paraguay_chaco_2024`, `paraguay_non_chaco_2024`
```sql
SELECT count(*) FROM read_parquet('trazo2-fields/*.parquet');
```
All 7 share an identical schema and column order.
## Schema
| Column | Meaning |
|---|---|
| `geometry` | MultiPolygon field boundary, EPSG:4326 |
| `Id` | auto-generated feature id; no external meaning |
| `mbmode24` | MapBiomas 2024 agriculture class, area-weighted mode (Table A1 of the technical note) |
| `mbcov_area_2024`, `mbvalid_area_2024` | QA: MapBiomas raster coverage / valid area (m²) |
Trazo2 exposes the same attribute columns as Trazo1. Trazo3 additionally carries Hansen
forest-loss columns.
## Caveats
Boundaries are model-derived and have not been field-verified. Object-level metrics on the model
card use a punishing 50% IoU matching threshold that systematically depresses them — treat pixel
metrics as the headline. Strongest for annual crops (soy, corn, other row crops); not designed for
agroforestry or other matrixed agricultural contexts. **Not intended to be used alone** to support
deforestation- or conversion-free claims.