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landam / grass-gis-git-migration-test

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add NULL and MASK support to i.smap #13

Open landam opened 5 years ago

landam commented 5 years ago

Reported by dylan on 11 Dec 2008 22:10 UTC Not sure if this is still true, but the manual page for i.smap says:

The module i.smap does not support MASKed or NULL cells. Therefore it might be necessary to create a copy of the classification results using e.g. r.mapcalc.

It would be nice to know if this is still the case.

Migrated-From: https://trac.osgeo.org/grass/ticket/396

landam commented 5 years ago

Modified by neteler on 12 May 2016 08:26 UTC

landam commented 5 years ago

Comment by marisn on 5 Dec 2018 11:37 UTC This still is a case.

To make things worse if NULL cells are inside a block, result differs significantly from a different sized block without NULL cells. Thus maps with NULL values should use as small blocks as possible.