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Terra Preta

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Thesis about Anthrohumox in Brazilian Lowland

1.4.1 Terra Preta Sites in Amapá

Ref no Location Source Latitude Longitude Location accuracy
2 At Cunani Meggers 1948, p.160 2.9 N 51.1 W 3
    (Ranzani et.al. 1962, p.13)      
3 Ca 50 km NW Macapa (Ranzani et.al. 1962, p.13) 0.40 N 51.32 W 3
4 At Rio Maraca Hilbert 1968, p.204 f 0.5 S 51.7 W 4
    Meggers 1948, p.160      
    Meggers and Evans 1957, p.66      
4a     - e.g. at Lazatz, 60 km SW Mazagao (Ranzani et.al. 1962, p.13)      
5 At Rio Ratapura, tributory of Rio Jari (Ranzani et.al. 1962, p.13) 0 53 W 4

The coordinates (latitude and longitude, in WGS84 datum) give an indication of the accuracy of the location:
With 1 decimal place an error of ca 10 km (or more) is to be expected, with 2 decimal places of ca 1 km, with 3 decimal places of ca 100 m, with 4 decimal places of ca 10 m.
The last column gives an overall indicator of accuracy, based on the geographic location and the reliability of the source. 1 means very good, 2 good, 3 satisfactory, 4 questionable.

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Last updates: 2007/2022