关键词: 地理可照时数, 地形遮蔽, VS2008, Arcgis Engine, 组件技术

Abstract: Because the model for computing geographic sunshine hours based on Digital Elevation Model (DEM) is complex and time-consuming, it is difficult to consider both high resolution and vast area at the same time when a study on geographic sunshine hours is conducted on a national scale in China. Some scholars proposed some methods for calculating high-resolution geographic sunshine hours across nationwide, however they didn't specify the computing platform and calculation methods. In this study, authors developed a set of automation system for calculating geographic sunshine hours based on existing models and DEM in which the part of curvature of the earth was corrected. This system was developed based on VS2008 platform and ArcGIS Engine component technology. The system could be used to calculate geographic sunshine hours at multi-spatial-scales and multi-resolutions. The raster data of geographic sunshine hours were generated as long as the user input DEM data with geographic coordinates of the region and the specific date.

Key words: geographic sunshine hours, terrain shade, VS2008, ArcGIS Engine, component technology