Journal
SCIENCE CHINA-EARTH SCIENCES
Volume 57, Issue 10, Pages 2386-2396Publisher
SCIENCE PRESS
DOI: 10.1007/s11430-014-4926-0
Keywords
HASM; spatial interpolation; initial value; sensitivity; accuracy; temperature
Categories
Funding
- National Natural Science Foundation of China [91325204]
- National Basic Research Priorities Program of Ministry of Science and Technology of the People's Republic of China [2010CB950904]
- National High-tech R&D Program of the Ministry of Science and Technology of the People's Republic of China [2013AA122003]
- Key Program of National Natural Science of China [41023010]
Ask authors/readers for more resources
The sensitivities of the initial value and the sampling information to the accuracy of a high accuracy surface modeling (HASM) are investigated and the implementations of this new modeling method are modified and enhanced. Based on the fundamental theorem of surface theory, HASM is developed to correct the error produced in geographical information system and ecological modeling process. However, the earlier version of HASM is theoretically incomplete and its initial value must be produced by other surface modeling methods, such as spline, which limit its promotion. In other words, we must use other interpolators to drive HASM. According to the fundamental theorem of surface theory, we modify HASM, namely HASM.MOD, by adding another important nonlinear equation to make it independent of other methods and, at the same time, have a complete and solid theory foundation. Two mathematic surfaces and monthly mean temperature of 1951-2010 are used to validate the effectiveness of the new method. Experiments show that the modified version of HASM is insensitive to the selection of initial value which is particular important for HASM. We analyze the sensitivities of sampling error and sampling ratio to the simulation accuracy of HASM.MOD. It is found that sampling information plays an important role in the simulation accuracy of HASM.MOD. Another feature of the modified version of HASM is that it is theoretically perfect as it considers the third equation of the surface theory which reflects the local warping of the surface. The modified HASM may be useful with a wide range of spatial interpolation as it would no longer rely on other interpolation methods.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available