I'm currently attempting to use r.region to preform analysis on a specific area of a raster image. I'm receiving Lat/Long data from the step before me, but I'm having issues using that data in r.region. 

The command I'm currently running is:

```
r.region map=dem n=32:13:51N s=32:13:34N e=110:56:46W w=110:57:13W

```

Which returns the error:

```
`ERROR: <n=32:13:51N> ** illegal value **`

```

What I'm confused about is that according to the specification, this input should be legal for r.region on GRASS 6.4. According to the documentation (<https://grass.osgeo.org/grass64/manuals/r.region.html>) the boundaries can be specified as:

```
 n=value
      Value for the northern edge (format dd:mm:ss{N|S})
 s=value
      Value for the southern edge (format dd:mm:ss{N|S})
 e=value
      Value for the eastern edge (format ddd:mm:ss{E|W})
 w=value
      Value for the western edge (format ddd:mm:ss{E|W})

```

Why does my input fail when as far as I can tell it is in the correct format?

All the examples I've seen of r.region don't do it this way and instead do something like `r.region map=mymap n=220750 s=220000 w=638300 e=639000`. I would have no problem running like this except I don't understand what those values are and how to convert from lat/long (I have both DD and DMS) to this integer value.