Spherekit: File
Environment
This option permits the user to leave a session and return to it later. Upon return, all variables are reloaded and the status of the program is restored.

Import Data
Use this selection to load your data into Spherekit. The built-in DEM is also loaded with this option.

Locations
A set of locations is classified either as a network (irregularly spaced) or a grid (regularly spaced). If you select Network, you are prompted for the column numbers of the latitude and longitudes. You are also prompted for the file name and the format of the file (binary or ASCII). For ASCII, you can enter a delimiter (or separating character). Usually, the delimited is a blank space; in this case leave the delimiter value blank. A final option is available to read in a location index for each location. This allows the observation values to be referenced by location number. To use this option, you are prompted for the column number of the index in the location file.

If you select Grid, you are prompted for the starting location and the grid resolution in east-west and north-south directions, either in km or degrees. You are asked for a name to assign to the grid, so that it can be referenced later. Finally, you must specify how values associated with this grid are referenced; this may be either west-to-east first or north-to-south first.

Observations
To load the data values associated with the grid or network that you've defined, enter the file name where they may be found and the column number. You are also asked for the associated grid or network name. If an indexed location is associated with each observation, select that option and enter the column number for the location index.

DEM
A digital elevation model (DEM) is built-in to Spherekit. To access it, enter the name of the grid or network that you've defined and assign it a file name. It now can be used as would any other observation data set in Spherekit.

Log Session

Delete Object
Any of the following can be deleted: observation file, grid or network description, interpolated field, error field, or postscript display.

Save
Save interpolated fields, error fields, observations, metadata, error statistics, derived variables, session logs, and parameter values. Supported formats include ASCII & binary.

Print
Print ASCII and postscript files of interpolated fields, error fields, observations, metadata, error statistics, derived variables, session logs, and parameter values.

Quit
Exit Spherekit and return to the operating system.