The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Forest stands classification is the precondition of stand inventory and forest management. It is also the primary task and main content of the inventory and dynamic monitoring of forest resources. With the improvements of the spatial resolution of remotely sensed image and the development of GEOgraphic Object-Based Image Analysis (GEOBIA) technologies, the precision of stand division had increased...
Typhoon disaster is a complex system in which the environmental possibilities with hazard (EPH) and the bodies bearing disasters (BBD) are various. And different disasters caused by typhoon not only have their own laws of occurring, developing and turning into disasters, but also have explicit relationships among them. As a modeling tool describing concepts on semantic and knowledge level, ontology...
The floating population (FP) is a concept in the background of China's particular household registration system. Most of the reported researches on FP were conducted with the census data and few of them concerned the potential value of remotely sensed (RS) data in the area. A methodology was described on how to extract indication information of the spatial distribution of FP using SPOT5 and ground...
Mining spatial association rules is one of the most important branches in the field of Spatial Data Mining (SDM). Because of the complexity of spatial data, a traditional method in extracting spatial association rules is to transform spatial database into general transaction database. The Apriori algorithm is one of the most commonly used methods in mining association rules at present. But a shortcoming...
This paper proposes a new video file, which can integrate video information, audio information, as well as the spatial positioning information into a whole file. Given that the video frames have their corresponding spatial positioning information, we propose a set of methods to organize and manage locatable videos based on GIS technique, including splitting locatable video into geographic semantic...
According to disaster system theory, the paper establishes the agriculture risk indicators system of typhoon disaster from four aspects: disaster-causing factors, hazard-formative environment, hazard-affected bodies and disaster resistant ability. It uses entropy weight theory based comprehensive evaluation to build the assessment model. Then, it implements the agriculture risk assessment of typhoon...
Natural disaster is one of the important factors that restrict regional sustainable development. Therefore, the study of models and tools of disaster vulnerability is a key issue for mitigating the consequences and risks of natural disaster in today's world. The paper takes Fujian province of China as an example to study the application of entropy weight theory in typhoon disaster vulnerability assessment...
This paper proposes a new video file, which can integrate video information, audio information, as well as the spatial positioning information into a whole file. Given that the video frames have their corresponding spatial positioning information, we propose a set of methods to organize and manage locatable videos based on GIS technique, including splitting locatable video into geographic semantic...
From local scale to globe one, the spatial distribution of human population is essential to the research in the fields crossing Demography, Humanities and Social Sciences, Environmental Science, etc. The census data of human population traditionally used inevitably have the disadvantage of low spatial and temporal resolution, and it's difficult to integrate the census data with multi-source ones as...
The Topographic Wetness Index (TWI) is frequently used to simulate the soil moisture conditions in a watershed quantitatively, and it is the most commonly used indicator for static soil moisture content as well. So it plays an important role in the research of soil erosion and distributed hydrological model in watersheds, etc. Additionally, the index was generally extracted from Digital Elevation...
Natural disaster is one of the important factors that restrict regional sustainable development. According to disaster system theory, disaster is the result of disaster-causing factors interacting with hazard-formative environment and hazard-affected bodies, but the vulnerability of hazard-affected bodies will aggravate or lighten the disaster to a certain extent. Therefore, the study of disaster...
Digital Elevation Model (DEM) is the main and commonly used data in extracting the digital drainage system in a basin. But the result of the extracted drainage networks would have great uncertainty because of introducing accumulation area threshold and the cell size of DEM in the context of scale effect. Therefore, it is of great significance to explore the relationship between the three above factors...
The spatial distribution of meteorological elements is important for understanding the regional meteorology and climate changes. However, previous studies rarely focused on the daily changes of the spatial patterns of meteorological elements due to the limitation of remote sensing (RS) techniques and traditional meteorological methods. In this paper, the regional meteorological elements were simulated...
Normalized difference vegetation index (NDVI) derived from remotely sensed image was a commonly used input parameter in many models concerned on forest ecosystem. But it was often interfered by many biological or physical factors such as the background under the tree crown, the nature of different kinds of tree, and so on. The relationship between NDVI, stand age and terrain factors of the planted...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.