Most existing GIS service systems focus more on providing geodata services than geoprocessing services, and offer very limited geoprocessing functions.
许多现有的GIS服务系统都集中于提供地理数据服务，而很少提供地理处理服务。
3
Most geoprocessing tools take datasets as input and produce new datasets as outputs, so most tool dialogs ask you where you want to write the output dataset.