[GRASS-user] Create Manning's n map

   For the defined region I want to create a map of the Manning's n friction
value (0.030) in each cell. v.in.ascii tells me it cannot find the input
text file:

v.in.ascii -n -b input=manning.txt output=manning format=point
ERROR: Unable to open input file <manning.txt>

   The file has no coordinates, only the single value 0.030. I am not finding
what is missing here. A pointer is needed.

Rich

Rich,

If you want to create a raster map with an uniform value, just use mapcalc:
r.mapcalc exp='manning=0.03'

And that's it.

Laurent

2017-02-22 16:40 GMT-06:00 Rich Shepard <rshepard@appl-ecosys.com>:

  For the defined region I want to create a map of the Manning's n friction
value (0.030) in each cell. v.in.ascii tells me it cannot find the input
text file:

v.in.ascii -n -b input=manning.txt output=manning format=point
ERROR: Unable to open input file <manning.txt>

  The file has no coordinates, only the single value 0.030. I am not finding
what is missing here. A pointer is needed.

Rich

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On Wed, 22 Feb 2017, Laurent C. wrote:

If you want to create a raster map with an uniform value, just use
mapcalc: r.mapcalc exp='manning=0.03'

Laurent,

   That is much simpler than what I tried to do.

Thanks,

Rich