Abstract:

The urban land use spatial pattern in terms of land use evenness obtained from land use information map is studied.Taking Neijiang City as an example,based on the ArcGis9.1,the urban land use evenness was calculated by 5 m×5 m,10 m×10 m,15 m×15 m grid sizes in the land use information maps.The results showed that the evenness of Neijiang urban land use was above 086.Different land use patterns showed relatively centralized distribution.The evenness of 3 grid sizes land use was different.In the areas with more complex land use and more fragmented land,gridscale changes greatly influenced the evenness of land use,while in the areas with a single land use representing a major area,the gridscale changes showed samall effect for the evenness of land use.The reason was that the more gridscale was,the more the distribution of small patches were covered up,thereupon,the region's main land use types were strengthened;on the contrary,with the narrow grid,small blocks of information could be gradually extracted,and the land use information extracted were more complicated