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If I have a list of points of interest in Google Earth Engine, e.g.

var pointList = [
  ee.Feature(ee.Geometry.Point(-73.96, 40.781)),
  ee.Feature(ee.Geometry.Point(6.4806, 50.8012))
];

var pointCollection = ee.FeatureCollection(features);

how can I draw a quadratic, planar region of interest around them, e.g. of size 100 x 100 km²? I have used ee.Geometry.buffer() in the past, but this function operates in geodesic geometry and doesn't lead to accurate results.

EDIT: To further specify - I am looking for a quadratic rectangle of 100 × 100 km2 in a local planar coordinate system, i.e. UTM. The problem with the buffer function is also that any rectangles are only quadratic in WGS84, but become rectangular when moving away from the equator.

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