Catchment from surface

[boutlaneyoussef]

Hello everyone,

I'm wondering if there is an option to specify minimun area of a catchment when we execute catchment analysis of a surface ?

Best regards,

[KirkWM]

There isn't an option based on area that I know of, only about the option to merge depressions with single drain watersheds if you set a depth tolerance in the surface analysis tab.

[boutlaneyoussef]

Thanks for your response,

I tried using this option but it does not give me the desired results.

[Joe-Bouza]

IMHO the catchment and watershed tools are too persnickety towards user input and find it much faster to draw the polyline.

[boutlaneyoussef]

That's what I have done for the moment since playing with the watersheds and catchment tools didn't gave me what I'm looking for.

Thanks

[rl_jackson]

I agree with @Joe-Bouza that sometimes its just easier to create it by drawing a polyline, but sometimes I'll also use the catchment command and trim its rendition of the "drainage area" and combine several of them together as one and make modifications from that.

[boutlaneyoussef]

This is what we used to do using GlobalMapper.