[R-sig-Geo] Difference between area calculations by QGIS and sf package

[Rik Ferreira]

Dear list members,

Why does sf::st_area returns a different area than the output of QGIS $area
for the same geometry?

A reproducible example (state of Minas Gerais, Brazil):

library(sf)
> mg <- geobr::read_state(31)
> st_area(mg)
>

sf::st_area: 588358849314 [m^2]
QGIS $area: 586521037474,860 m²

The layer used in QGIS was exported with st_write() in GeoJSON format.

The error is: 1837811840 m².

Thank you for the attention.

Att.

-- 
Rik Ferreira Alves
Graduando em Geografia - Unimontes
https://rikferreira.netlify.app/

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