* Giuseppe Amatulli <[email protected]> [2017-04-20 12:05:42 -0400]:
Hi,
Hi Giuseppe,
I have a huge streams/lakes dataset and I want to be able to select only
water bodies (streams) with 1-cell width.
In other words if i have this raster
[image: Inline images 1]
I want to select only this streams
[image: Inline images 2]
Interesting. I don't think there already exists a grass command to do
this.
Just an idea: a function, carefully designed to select only pixels with max.
two neighboring pixels, max. two in a row, max. two in a column or two in a
diagonal, etc.
Perhaps a filter? A moving window that will scan the image and "collect"
only pixels that satisfy carefully thought criteria.
Nikos
Any suggestion or grass command that does such operation.
Thank you
Best
--
Giuseppe Amatulli, Ph.D.
Research scientist at
Yale School of Forestry & Environmental Studies
Yale Center for Research Computing
Center for Science and Social Science Information
New Haven, 06511
Teaching: http://spatial-ecology.org
Work: https://environment.yale.edu/profile/giuseppe-amatulli/
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--
Nikos Alexandris | Remote Sensing & Geomatics
GPG Key Fingerprint 6F9D4506F3CA28380974D31A9053534B693C4FB3
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