[GRASSLIST:5020] Looking for something like r.grow, but that retains value..

GRASS GRASS user
1

Hi folks,

I'm looking to 'grow' a line in a raster much like r.grow would do, but have the new cells take on the value of its nearest tangential neighbor- not 1. Basically I have a thin line of varying data which I am trying to emphasize, to make it easier to see.

Any ideas?

thanks

2

Hi folks,

I'm looking to 'grow' a line in a raster much like r.grow would do,
but have the new cells take on the value of its nearest tangential
neighbor- not 1. Basically I have a thin line of varying data which I
am trying to emphasize, to make it easier to see.

Any ideas?

I thought r.grow would have suited your purpose. The man pages
say that the -b switch forces the output to be binary, by default
though, the attribute of the source is preserved.

Here's the man page extract:
"-b
Output a binary raster map layer having only zero-one category
values, regardless of the category values in the input map layer. In
this case, all cells with a non-zero category value in the input map
layer are assigned to category 1 in the output map layer. If the -b
flag is not used, these cells will retain their original non-zero
category values. In either case, all cells whose category value is
changed from 0 during the growing process are assigned a category
value of 1 in the output map. "

Hope this helps

Thomas