pscontour: required arguments

[anbj]

According to the pscontour docs, the only required arguments are table, -J and -R.

• Should not -J be optional? Using pscontour with -D no plotting will take place, -J should not be necessary.
• Looks like -W or -I are required? Only when plotting (i.e. no -D)?

$ gmt pscontour <file>
pscontour [ERROR]: Must specify a map projection with the -J option
pscontour [ERROR]: Must specify a region with the -R option
pscontour [ERROR]: Must specify one of -W or -I