this research was conducted to investigate spatial variability and estimate tree attributes in a plantation forest in the caspian region of iran using geostatistical analysis. sampling was performed based on a 50m?125m systematic grid in a maple stand (acer velutinum boiss) 18 years of age using circular samples of 200m2 area. totally, 96 sample plots were measured in 63 hectares and 14.25 hect...

Geo-ontologies play an important role in fostering the publication, retrieval, reuse, and integration of geographic data within and across domains. The status quo of geo-ontology engineering often follows a centralized top-down approach, namely a group of domain experts collaboratively formalizing key concepts and their relationships. On the one hand, such an approach makes use of the invaluabl...

With the rise of China and the implementation of the “21st Century Maritime Silk Road” strategy, research on geo-economics between China and ASEAN (Association of Southeast Asian Nations) countries has become increasingly important. Current studies mainly focus on influencing factors, while there is little consideration about how these influencing factors act on geo-economic relationships. Ther...

Even though the efforts to contribute to and sustain the Global Earth Observation System of Systems (GEOSS) are voluntary, the derived benefits will be enjoyed by contributors and non-contributors alike. Thus, GEOSS can be classified as a public good, whose provision is prone to “free-riding”. We analyze the benefits of participating in GEO (Group on Earth Observation) and GEOSS as well as the ...