Gis_wkb_vector has two iterator classes — Gis_wkb_vector_const_iterator and Gis_wkb_vector_iterator.

Gis_wkb_vector has two iterator classes — Gis_wkb_vector_const_iterator and Gis_wkb_vector_iterator.

The differences between the two classes are that the Gis_wkb_vector_const_iterator can only be used to read its referenced value, so it is intended as Gis_wkb_vector's const iterator; While the other class allows both read and write access. If your access pattern is readonly, it is strongly recommended that you use the const iterator because it is faster and more efficient. The two classes have identical behaviors to std::vector::const_iterator and std::vector::iterator respectively.