4.7 Catchment Polygon
Catchment polygons are the vector representation of the catchment grid. Similar to the catchment grid a catchment polygon bounds the region which has a single drainage outlet.
Figure x.x shows the catchment polygon
obtained corresponding to the catchment grid obtained in the section 4.6 for the
synthetic grid.
In the Input section of the dialog browse the
Catchment Grid generated by the step 4.6. In the Output section of the dialog
browse the file name to which the Catchment Polygon could be saved. At this
point module is ready to run; select Run to begin processing. Please be
patient until it completes processing. The text browser at the bottom of the
dialog should provide information related to any error or processing. If the
Load in Data Frame is checked the generated Catchment Polygon will be
automatically loaded in the Qgis window. After the processing is complete you
need to press Close to proceed to next
step.