Application of Spatial Interpolation in GIS[J]. Journal of Civil and Environmental Engineering, 2004, 26(1): 35-39. DOI: 10.11835/j.issn.1674-4764.2004.01.009.
Spatial interpolation includes point interpolation and areal interpolation. The point interpolation is mainly used to deal with natural geography data and the areal interpolation is usually used to solve the interpolation problem of social economic statistic data. However
social economic statistic data are often collected by areas
which cannot represent their real spatial distribution. A spatial distribution model of social economic statistic data is to be established to conform to their real spatial distribution. Using the areal weighting interpolation and inverse distance weighted averaging
a spatial distribution model of GDP is established in this paper.