revise stretch arguments
revise stretch arguments

liangcun/ConceptsOfSpatialInformation,liangcun/ConceptsOfSpatialInformation,liangcun/ConceptsOfSpatialInformation,spatial-ucsb/ConceptsOfSpatialInformation,spatial-ucsb/ConceptsOfSpatialInformation,spatial-ucsb/ConceptsOfSpatialInformation