This paper provides a discussion of the choices that need to be made to classify locations and aggregate them into larger units such as cities or metropolitan areas. It also selectively surveys related literature with a focus on the contributions published in this special issue.

中文翻译：

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分类位置和划定空间：简介

本文讨论了对位置进行分类并将其汇总为较大的单位（例如城市或大都市区）所需的选择。它还选择性地调查了相关文献，重点是本期特刊中发表的文章。