Approaches for automatically constructing 2D entities (e.g. 2D polygons) using 1D entities (e.g. 1D edges) have been widely discussed. However, few studies have considered how to construct 3D entities using lower‐dimensional entities, and fundamental research comparing 2D with 3D construction is even lacking. Therefore, this article proposes the Approach for Construction of Spatial Entities Based on Unified Logic (ACSEBUL), which can be applied to both 2D and 3D situations and can guarantee validation of these constructed 2D (3D) entities. Detailed definitions of the primitives and descriptions of ACSEBUL are provided, and typical 2D and 3D examples are shown. Furthermore, example experiments are performed using 2D and 3D parcels in Shenzhen, China. The results demonstrate that the 2D and 3D ACSEBUL methods, which are based on unified logic, can be used to automatically construct 2D and 3D entities, respectively.