#2917: r.mapcalc neighbour modifier uses wrong row
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Reporter: marisn | Owner: grass-dev@…
Type: defect | Status: new
Priority: blocker | Milestone: 7.0.4
Component: Raster | Version: svn-releasebranch70
Keywords: r.mapcalc | CPU: Unspecified
Platform: Unspecified |
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Seems that in some occasions r.mapcalc neighbour modifier is using values
from wrong row. A further analysis is required. Setting as a blocker as it
causes silent result corruption (produces wrong results that could be
mistaken for correct ones).
Steps to reproduce with NC:
{{{
g.region n=224480.25 s=223910.25 w=635623 e=636449.5 res=28.5
r.mapcalc "nd = if(landclass96[1,0]!=landclass96, landclass96[1,0],
null())"
}}}
Visually examine both maps landclass96 and nd - values in "nd" should be
only above borders present in landclass96 map. In one case, there are
values below border (an attachment will be provided with markings for
easier spotting).
First reported here: https://lists.osgeo.org/pipermail/grass-
dev/2016-February/078918.html
Tested with 7.1 and:
GRASS versija: 7.0.4svn
GRASS SVN Revision: 67825
Būvējuma datums: 2016-01-14
Build Platform: x86_64-pc-linux-gnu
GDAL/OGR: 2.0.1
PROJ.4: 4.8.0
GEOS: 3.5.0
SQLite: 3.10.2
Python: 2.7.11
wxPython: 3.0.2.0
Platform: Linux-4.4.0-gentoo-x86_64-Intel-R-_Core-TM-2_Duo_CPU_P9500_@_2
.53GHz-with-gentoo-2.2
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Ticket URL: <https://trac.osgeo.org/grass/ticket/2917>
GRASS GIS <https://grass.osgeo.org>
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