Panagiotis Mavrogiorgos wrote: > Are there any restrictions to the location/mapset names?
They may not contain any of the characters: / " ' @ , = * or space, DEL (code 127/0x7F), any control character or any 8-bit character. [source: lib/gis/legal_name.c] Also, because map, mapset and location names are used directly as file and/or directory names, they may not contain any character which is prohibited in a filename by the underlying OS. On Windows, this includes: \ / : * ? " < > | [source: try entering any of these characters when renaming a file or directory on Windows.] The OS may also impose other restrictions (e.g. you typically can't have a file or directory named "." or ".." although the "." character isn't itself prohibited). > I just found out that if you use a numeric mapset (e.g. 2014_123) you have > to use single quotes in mapcalc expressions. Which names are legal and which names can be used in r.mapcalc without quoting are different. E.g. a "-" character (minus, hyphen, dash) is legal in a map, mapset or location name, but r.mapcalc requires the name to be quoted, otherwise it will be interpreted as a subtraction. > e.g the following example will > raise an error: > > r.mapcalc expression="foo=R1@2014_123" > > results in: > > syntax error, unexpected INTEGER, expecting VARNAME or NAME An unquoted name consists of a sequence of characters other than space, control characters, or any of: ^ # @ , " ' ( ) [ ] + - * / % > < ! = & | ? : ; ~ [source: raster/r.mapcalc/mapcalc.l, definition of "N" (line 97).] *However*: it may not have a prefix which is a valid integer or floating-point literal (which is why your example above generates an error), as those take precedence over names. A quoted name can contain any character other than the quote character itself. Note that quoted names aren't always maps (or mapsets or locations); they can also be used for variables if you feel you have to use a name which isn't valid as an unquoted name. -- Glynn Clements <gl...@gclements.plus.com> _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user