关键词: 对地观测, 元数据, 树模型, 数据立方体

Abstract: This paper aimed to investigate an abstract tree model for gridded cube metadata， designed to facilitate the management of heterogeneous multisource earth observation metadata， thereby reducing the need for parsing， adaptation， and storage structure design for heterogeneous metadata. Firstly， based on the analysis of the fundamental characteristics of earth observation metadata， this study abstracted the general components of metadata and defined a unified abstract tree model along with its operational methods. Subsequently， the storage and operational mapping of abstract tree models were implemented based on a relational database system. This endeavor was complemented by the design of a gridded cube metadata model aligned with prevalent international standards for geographic information interoperation. The overarching objective was to achieve unified integration and storage of heterogeneous metadata. Finally， a prototype system for managing gridded cube metadata was constructed. The management of North Atlantic environmental variables data was presented as an application case to demonstrate the operations of gridded cube metadata based on the abstract tree model. The application indicates that the proposed metadata model is user-friendly， highly extensible， and effectively supports the integration and storage of earth observation metadata.

Key words:  , earth observation, metadata, tree model, data cube