Add several roxygen @param statements
Add several arguments to function
Get expected filename for volume sources
Open conditional block to create volume sources file
Create empty file in working folder
Add header row to new volume sources file
Determine whether lon/lat provided
Determine whether UTM coords and zone info provided
Begin conditional block to convert lon/lat to UTM
Get matrix of longitude/latitude for source location
Determine the UTM zone
Determine the hemisphere of the source location
Define PROJ.4 projection string for lat/lon projection
Define PROJ.4 projection string for UTM projection
Project as UTM coords from the determined UTM zone
Define UTM x coordinate in km units
Define UTM y coordinate in km units
Begin conditional block to convert UTM to lon/lat
Define PROJ.4 projection string for UTM projection
Define PROJ.4 projection string for UTM projection