本文件基于ISO 19123覆盖几何模式中定义的覆盖抽象模式，指定了一个具体的[1]可实现、一致性可测试的覆盖结构。本文档定义了一种适用于多种编码格式编码的结构。 [1] 这里使用的“具体”与引言中描述的“抽象”形成对比。

This document specifies a concrete[1] implementable, conformance-testable coverage structure based on the abstract schema for coverages defined in the ISO 19123 schema for coverage geometry. This document defines a structure that is suitable for encoding in many encoding formats. [1] "concrete" is used here as a contrast to "abstract" in the sense described in the Introduction.