[GRASS-user] r.slope.aspect edge

[YuGo]

I tried to make slope raster from text file.
This raster have white edge(1px).
How to create no edge file?

commands is follows.
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>r.in.gdal input=S654153.MEM output=S654153
>g.region rast=S654153
>r.out.tiff -t input=S654153 output=S654153
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example.
http://www2.gtec-ni.com/dem/S654153.tif