[GRASS-user] bash script error

[Glynn Clements]

Rebecca Bennett wrote:

> r.mapcalc '${BKG} = if(isnull(modern_mask at Brovey),${MAP},0)'
> 
> but it ends with the error
> 
> Invalid map <${MAP}>
> 
> Can
>  anyone tell me how I should include calls to the map and name a 
> derivative using the original raster name? I have used this syntax with 
> success before so have not be able to troubleshoot this.

You need to use double quotes around the r.mapcalc expression. 
Single-quoted strings take everything up to the next single quote
literally, while double-quoted strings expand variable substitutions.

-- 
Glynn Clements <glynn at gclements.plus.com>