Application of Ordinary Kriging Interpolation for Calculating Earthwork in Land Consolidation Based on ArcGIS

To improve the calculation method of earthwork，Chunqiu，Linquan，Dawan villages of Zhuxi Town in Kai County in Chongqing were studied.Distribution and trend of elevation data were analyzed by Geostatistical module of ArcGIS software.Errors were predicted and best model was chosen by Spherical，Circular，Exponential and Gaussian models of Ordinary Kriging to calculate the earthwork of field.The results showed that in the 1st typical Area involving with 44 pieces of land and area of 29.7326 hm2，ME was-0.0178，RMSSE was 0.969 9，ASE was 2.039，RMSE was 2.374 5，and excavation was 49 959.1 m3；in the 2nd typical Area involving with 20 pieces of land and area of 22.904 9 hm2，ME was-0.004，RMSSE was 1.019，ASE was 1.447，RMSE was 1.531，and excavation was 32 935.0 m3.In conclusion，gaussian model fits best for such kind of calculation.