Landsat has an average resolution of 30m, so it is common to associate the area of ​​a pixel to 900 m2. But, since the original MapBiomas Trinational Pampa data is created following the GEE standard representation (Lat/Long and WGS84), it does not use a native equal-area projection. Thus, the distance from the target to the Equator Line influences the pixel size. Therefore, in the continental scale area, calculation counting the pixels and multiplying by 900 m2 should be avoided.

In MapBiomas Trinationall Pampa the calculation is performed within Google Earth Engine. We apply the function ee.Image.pixelArea() that generates an image in which the value of each pixel is the area of that pixel in square meters, taking into consideration occasional cartographic distortions.