The following discussion from !5065 should be addressed: - [ ] @chleh started a [discussion](https://gitlab.opengeosys.org/ogs/ogs/-/merge_requests/5065#note_143155): (+1 comment) > Why precision of 18 digits? > > Better use https://en.cppreference.com/w/cpp/types/numeric_limits/max_digits10? > > > The value of std::numeric_limits<T>::max_digits10 is the number of base-10 digits that are necessary to uniquely represent all distinct values of the type T, such as necessary for serialization/deserialization to text. > > [...] > > the conversion of a floating-point value to text and back is exact as long as at least max_digits10 were used (9 for float, 17 for double): it is guaranteed to produce the same floating-point value, even though the intermediate text representation is not exact.