The third chapter studied the graphic information significant of land use patch and land use spatial pattern based on the land use data in Changling County.

第三章基于长岭县的土地利用数据，研究土地利用斑块和土地利用空间格局的图形信息涵义。

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This will acquire pictures of land use and vegetation changes from an altitude of 820km, maintaining an important data series started by the French Spot satellites in the late 1990s.

BBC: Esa's Vega rocket puts Proba-V vegetation mission in orbit