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This paper describes a method to find a least-cost path for water diversion planning in the high-altitude mountain area by using the GIS techniques. However, existing algorithms could not be used for practical water diversion projects in the China's southwest region. To improve conventional cost path analysis, we first use the heuristic algorithm to build a three-dimensional elevation surface model...
The floodplain is a complex socio-economic and ecological interaction system. With urbanization and land cover change of floodplain, flood magnitude, frequency and pathway have been changed and have an impact on economics, society and ecology. Formal modeling approaches provide calculus and inference methods for decision support systems. This paper has developed a formal modeling approach for the...
With the rapid evolvement of mobile and cloud technology, improving and optimizing business mobile apps' customer experience has unprecedented importance. Mobile developers are expecting a tool that can help them know how customers are interacting with their apps, and how their apps react to the customers' behaviors. If there is any imperfection of the mobile app interface design or bugs being thrown...
The Zoige Wetland National Nature Reserve is influenced by multiple factors, and the changes of holistic distribution and environment on the land cover are aggravating unceasingly. This paper is an integrated analysis include the spatial distribution pattern, rangeability, mainly changeable reasons of land cover types, and conditions of environment, which is made by tow images in 2010 and 2014 received...
Flooding is one of the most common natural hazards in China, and many flood events have caused tremendous economic losses and casualties. Moreover, the process of urbanization aggravates the regional threat posed by flooding. Assessment of flood prone areas is of great importance for watershed management and reduction of potential losses. In this study, the spatial multi-criteria analysis (MCA) method...
Air pollution problems are closely linked to geographic locations. The existing environmental monitoring systems have little focus on geographic information processing and real time visualization. In this paper, a spatial extension to main-memory database is implemented to support the storage and index of spatial-temporal data. Meanwhile, historic data is stored in disk-based spatial database, providing...
The Geoinformatics conference series was initiated by the International Association of Chinese Professionals in Geographic Information Sciences (CPGIS) in 1992. This international conference series has provided a unique forum for exchanging novel ideas and cutting-edge knowledge on geographic information sciences and technologies among GIS professionals worldwide. The 24th International Conference...
Intracity travel has increased significantly in second-tier cities in China, accompanied by a large number of passenger arrivals, departures, and transfers in airports, railway stations and so on. This increased travel demand has placed a strain on the surrounding traffic of such external traffic hubs. Also, the original designs of connecting lines may not be appropriate for new travel needs. Therefore,...
Synthetic Aperture Radar (SAR) images are widely used in land use classification. However, the influences of buildings may cause classification errors when SAR images are applied in urban areas. Aiming at the property of low Signal to Noise Ratio (SNR) of SAR images and the complexity of building textures, we obtained the initial segmentation using the Maximum likelihood (ML) algorithm based on the...
This paper proposes a new method of occlusion detection to generate true orthophotos. This method describes the geometric relationship between occlusion area and ghost image by establishing a mathematical model. The advantage of this method is: (1) the model we have established indicates that sizes and boundaries of occlusion areas can be determined by buildings' roofs and visual facades. We take...
An urban center area is usually a zone filled with high-rise buildings, which not only block the sunlight, but also influence the air flow. This phenomenon is extremely easy to lead to the “heat island effect” and “dry island effect”, which could result in the deterioration of microclimate and environment quality. Facing this situation, open spaces could not only provide the place for citizens to...
K-Medoids algorithm plays an important role in spatial data mining for its ability to eliminate the outliers' influence. However, it faces several challenges including the initial Medoids' selection problem and the computational complexity with the increasing spatial data volume. In order to improve the result validity and time efficiency of the clustering process on massive spatial data, we modified...
Currently, different representation topologies are being used in the modelling of dynamic systems. This variety of topologies allows a more accurate representation of the reality. On the other hand, the models try to recreate the physical model of a dynamic phenomenon. The apogee of the geographic systems and their further use as study tools of dynamic systems has allowed the integration of topologies...
In the year of 2014, Beijing hosted the 22nd annual APEC Economic Leader's Meeting. To improve the air quality during the meeting, the government had taken various actions to reduce the pollution emission in the region. The pollution caused by particulate matter less than 2.5µm (PM2.5) is one of the biggest environmental threats in Beijing. Given the magnitude of the control measures that were taken...
To facilitate interoperability and sharing of geospatial data, OWSes have been increasingly adopted to describe scientific data. Interoperable OWS can facilitate the integration of different scientific application services. However, the OWS required by users is difficult to be found and utilized from a large number of OWSes because the OWSes have no clear semantic knowledge in their service data or...
An efficient ventilation system provides underground coal mine with sufficient fresh air, removes dust and hazardous gases, which is the guarantee of the environmental safety in a laneway of coal mines. The airflow dispersion behavior seriously impacts the removal efficiency of dust in the mine network. This paper describes the dynamic characteristics of airflow and dust dispersion regularity based...
Precipitation interpolation is a difficult and hot spot in water science. The way to ensure the precision of interpolation outcome is the key point. This paper chose monthly precipitation data of 52 precipitation stations in Xiangjiang River Basin from year 1980 to 2008. Geostatistical Analyst Tools in ArcGIS 10.2 were used to interpolate the precipitation data. Cross validation was used to interpolate,...
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