How to choose the number of minarea pixels based on the dem cellsize you have

wschwanghart / topotoolbox

A MATLAB software for the analysis of digital elevation models -

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How to choose the number of minarea pixels based on the dem cellsize you have #14

Closed ZCG113035 closed 1 year ago

ZCG113035 commented 4 years ago

In the process of analysis, we must first define the minarea pixels. I asked if the minimum area defined as alluvial channel is 0.9km ^ 2, so the dem pixel you use is 30 × 30, and your "minarea" value is 1000, but if my pixel is 90 × 90, should I choose 111? Hope you can help me answer your doubts, thank you.

wschwanghart commented 1 year ago

Just seen that I never replied. Sorry. Sometimes, it may be better to choose minarea according to map units. Please check the 'units' option in STREAMobj.