In the lowlands of Central Veracruz, as in various locations across the base of the Yucatan peninsula. Prehispanic agriculturalists sought out wetlands with a limited fluctuation in water level for adaptation to intensive cultivation. Vestiges of canals and raised fields show through the dry season, pastures of many ranches. The rectilinear remains of the earlier incursion show considerable accordance, from wetland to wetland, in their astronomical orientation: about 15° clockwise of our own cardinal directions. It may be hypothesized that this orientation was imposed from Teotihuacan and that the majority of the raised field vestiges seen in the wetlands of Central Veracruz date back at least to a time between A.D. 100 and 600.