Assertion: drainage basin | /r/HasAspect | polygon
Facets:
value: with the rain gauge
type: OTHER
value: in the middle of each polygon
type: LOCATION
value: in the thiessen polygon method
type: MANNER
Source sentences:
text: In the Thiessen polygon method, the drainage basin is divided into polygons with the rain gauge in the middle of each polygon assumed to be representative for the rainfall on the area of land included in its polygon.