Using a Data Set with No Map Coordinates

The plotting and statistical summaries of mapdata can be used with data sets that do not have any geographic coordinate data. To use such a data set, it is necessary to add columns with dummy values of latitude and longitude to the data set. Values of 0 (zero) are simple and sufficient; these will cause the map display to show all data markers in the middle of the Gulf of Guinea. The map display can be minimized by using the mouse to click on the splitter bar between the map and data table, and then drag it up to the top of the display. The Table/Hide/show columns menu item can be used to remove the columns of dummy geographic coordinates from the displayed data table.