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Current status and future directions of geoportals

International Journal of Digital Earth 2020年第10期13卷 1093-1114页

作者： Hao Jiang John van Genderen Paolo Mazzetti Hyeongmo Koo Min Chene University of the Chinese Academy of Sciences BeijingPeople’s Republic of China Chinese Academy of Sciences Aerospace Information Research InstituteBeijingPeople’s Republic of China Faculty of Geo-Information Science and Earth Observation University of TwenteEnschedeThe Netherlands Institute of Atmospheric Pollution Research National Research CouncilFlorenceItaly Key Laboratory of Virtual Geographic Environment(Ministry of Education) Department of GeographyNanjingNanjing Normal UniversityJiangsuPeople’s Republic of China

geoportals are a consolidated web-based solution to provide open spatial data sharing and online geo-information *** roles and possible advancements according to the Digital Earth vision and implementation require *** paper presents a review of the literature concerning geoportals and serves the following primary ***,various geoportal approaches for discovering and accessing Earth observation data and geo-information,mainly with scientific purposes,are summarized according to their characteristics and ***,current major challenges in geoportals are identified in terms of functionalities,technologies,and especially big data support,from geoportal cases of ***,based on lessons learned from the international and Chinese geoportals,solutions and recommendations for the challenges in geoportals are proposed in terms of their architectures,services,and *** results show that geoportals usually provide access to distributed data systems,offering maps,data discovery,and data *** of them are also capable of offering online analysis and processing service,enhanced semantic search engines,and dynamic visualization *** strength of geoportals could lead to a full-fledged online Digital Earth system that could provide better data sharing and dissemination solutions to the challenges posed by big data.

关键词： Geoportal(s) big Earth data Digital Earth taxonomy of geoportals geoportals in china

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