| Summary: | 碩士 === 國立高雄應用科技大學 === 土木工程與防災科技研究所 === 94 === Abstract
Our country promotes the development of space science and technology actively in recent years , have developed satellites by oneself and introducing LiDAR technology (Light Detection and Ranging )into Taiwan ,receiving information in time ,the telemetering measurement technology of independence for getting the land and nearby sea area of real-time satellite image data in Taiwan in order to promote relevant people's livelihood such as the land use、agriculture and forestry planning、environmental monitoring、calamity assessing、scientific research、education of science and etc.It will be the time facing information explosion in the future and how to use too much information efficiently will be the trend in the future. It is the point in this research that information conten of DEM data how to influence the extracting geomorphological characterisation and analysis
In Taiwan ,producing several resolution of DEM data and playing more and more functions in the national economy and industry improves. Point of the research is to disscuss basic conception of spatial information content、theory、method of analysis to find the index of spatial information content about DEM and then to analysis precision in result and applicability .Choosing 5 meter resolution DEM be the reference DEM , and reduce to 10 meter、20 meter、40 meter resolution DEM , then resampling 10 meter、20 meter、40 meter resolution DEM to 5 meter resolution DEM . After resampling , extracting the geomorphological characteristation such as contour、hypsometric curve、slope、aspect、stream and to research information content losing rate and suitable index. Using computer language、number analysis、statistics、entropy、 fractal dimension、the error comparing. Discussing difference resolution DEM to extract geomorphological characterisation in hill or mountain area and it’s information content losing rate. Providing the suitable index to researcher or user in the future.
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