全球地表覆盖变化信息的动态服务模型与方法研究

地表覆盖及变化是开展全球变化研究、气候变化预测、生态环境评估等所依据的重要基础信息。目前地表覆盖网络化共享服务的手段较为落后，停留在基于快照的静态信息服务阶段，远远不能满足重大科学研究对变化信息和动态计算的服务需求。为了从静态信息服务走向顾及时空变化的动态信息服务，需综合考虑地表覆盖静态和变化两大类信息的web描述、发布和调用，实现多源、异构、分布的地表覆盖变化信息资源的有效组织和快速准确发现及集成与动态计算服务。本项目针对这一国际学术前沿，研究地表覆盖变化信息web服务关系研究与建模、顾及语义的地表覆盖变化信息知识表达与发布、顾及主题特征的地表覆盖服务发现、顾及关系的服务动态生成等，构建地表覆盖变化信息的动态服务模型和实验平台。该研究将深化对地表覆盖变化信息服务的认识，在国际上开拓和带动地表覆盖动态信息服务的研究与应用，为全球地表覆盖信息网络化共享服务平台的建设运行提供先进思路与方法。

Land cover and its changes is fundamental information for global change research, climate change projections, and assessment of eco-environments. Current internet-based land cover information service provides only snapshot-based static information, and is far behind the increasing needs of change information and computing services. Moving towards dynamic information services is the future direction of global land cover mapping and studies. This requires taking into account the web-based description, publishing and service calls of both static and spatio-temporal change of land cover, and realize effective integration, fast and accurate discovery of multi-source, heterogeneous and distributed land cover information resources, as well as provide dynamic computing services. This project aims at developing novels concepts, models and algorithms about dynamic global land cover information services, including abstraction and formalisation of web service relations of land cover changes, semantics based knowledge formalisation and publishing of land cover changes, domain knowledge -based automatic discovery of land cover web service, and relation-based dynamic computing. An experimental platform will be set up with international collaborations. This study will deepen the understanding of land cover dynamic information services, and provide advanced ideas and methods to development of distributed global land-cover information platform for promoting better global land-cover information sharing worldwide.