# 面積計算 # ESRI shapefile ですでに計算対象の属性フィールドがある場合 arcpy.CalculateField_management(file_name, clumn_name, "!shape.area@squarekilometers!", "PYTHON", "") # 使用可能な単位 ACRES, ARES, HECTARES, SQUARECENTIMETERS, SQUAREDECIMETERS, SQUAREINCHES, SQUAREFEET, SQUAREKILOMETERS, SQUAREMETERS, SQUAREMILES, SQUAREMILLIMETERS, SQUAREYARDS, SQUAREMAPUNITS # !shape.area@XXXX! のXXXXに上記単位を指定してやればよい