Hi DenesL, I didn't test *st_dwithin* with use_spheroid because I changed my "strategy" to use geometry fields instead of geography's for GIS calculations. The function I really miss and am willing to test is *st_transform ( st_interpolate* could be good too*)*. So far I did some calculations/queries with* st_distance* and the original *st_dwithin *and results obtained were coherent. I really don't like having to executesql(queries) to compensate for the lack of *st_transform *and to "reinvent the wheel" anytime I need to *validate_and_insert *or *update_or_insert* GIS data. I like to use the DAL
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