The Geography Markup Language (GML) is an XML grammar for expressing geographical features. GML serves as a modeling language for geographic systems as well as an open interchange format for geographic transactions on the Internet.

Explore OGC's CityGML Standard, enabling the representation, storage, and exchange of 3D city models for urban planning and geospatial analysis.

地理标记语言 (GML)是一种用可扩展标记语言 (XML)编写地理信息的方式，以方便地理信息的传输和存储。 可以将其视为描述应用程序架构的XML语法，应用程序架构描述特定领域或给定上下文中的概念结构。 GML用来模拟地理现象的一些关键概念包括： 特征：现实世界现象的抽象；如果它与相对于地球的某个位置相关联，它就是一个地理特征。 属性：功能的状态由一组属性定义，其中每个属性可以被认为是一个 {name，type，value}三元组。 术语特征可用于指代特征的类型或 …

Geography Markup Language （GML） 该标准定义了符合 ISO 19118 的 XML 编码，用于传输和存储按照 ISO 19100 系列国际标准中使用的概念建模框架建模的地理信息，包括地理特征的空间和非空间属性。

This standard defines the PSMs and schemas for the CityGML 3.0 Implementation Specification (IS) for Geography Markup Language (GML) implementations. The GML schemas are explained in an overview and design decisions that have been made are documented as well.

The Geography Markup Language (GML) is the XML grammar defined by the Open Geospatial Consortium (OGC) to express geographical features. GML serves as a modeling language for geographic systems as well as an open interchange format …

The Geography Markup Language (GML) is a way of writing geographic information in Extensible Markup Language (XML) to facilitate the transport and storage of geographic information. It can be thought of as an XML grammar for the description of application schemas that describe the structure of concepts in a particular domain or given context.

2022年12月9日 · CityGML（City Geography Markup Language）是由开放地理空间联盟（OGC）制定的一种用于交换三维城市模型的标准。 它定义了 城市 对象的语义和拓扑结构，允许数据在不同的软件和系统之间无缝传输。

2021年9月13日 · At a minimum, support for a Geography Markup Language (GML) Implementation Specification is expected. Additional Implementation Specifications for JSON and database schemas are also highly desirable. A discussion of current and planned efforts to build Implementation Specifications for the CityGML Conceptual Model can be found in …

Geography Markup Language is an XML grammar written in XML Schema for the description of application schemas as well as the transport and storage of geographic information. The key concepts used by Geography Markup Language (GML) to model the world are drawn from the