Hi. Why these functions returns different results?
st_length_spheroid(GeomFromText('LINESTRING(0 0,180
0)',4326),'SPHEROID["WGS 84",6378137,298.257223563]')
&
st_distance_spheroid(geomfromtext('POINT(0 0)',4326),
geomfromtext('POINT(180 0)',4326),'SPHEROID["WGS
84",6378137,298.257223563]')
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