Marking Selected Map Locations

A location on the map can by highlighted by clicking on the location marker that is shown on the map or by clicking on a row in the table that is displayed below the map. By default, the map location will be marked with a red wedge. The selected table row(s) will be highlighted with a dark blue background. Multiple rows in the table may be selected when one location on the map is highlighted if the table contains multiple rows with the same coordinates.

If the data table includes rows that have no coordinates, those rows can be selected by clicking in the table, but no corresponding highlight marker will appear on the map.

The data table will always automatically scroll to show the most recently selected location on the map.

Clicking on the location label on the map will also select the location. When locations and labels are closely clustered and overlapping on the map, zooming in may be required to make an accurate selection.

By default, only a single location can be selected at one time by clicking in the table or on the map. In this mode, clicking on a second location will cause the first to be un-selected. The Multi-select checkbox above the map can be used to enable selection of multiple locations at one time. If multi-select mode is turned on when one location has already been selected, that location will remain selected. If multi-select mode is turned off when any locations have been selected, all of those locations will be un-selected.

Multiple data values can also be selected by entering a query expression using the Selections/Data query menu item, which will bring up the Query Data dialog. This dialog can also be opened from the map display with the Alt-Q hotkey. The Selections/Co-located data menu item will open the Co-located Data dialog, which will allow selection of data based on the number of data rows at a location. Both the Query Data dialog and the Co-located Data dialog allow the selections to be combined with any existing selections in several different ways.

If many locations are to be included in the set of selected data values, and only a few are to be excluded, those that are to be excluded can be selected using the mouse or a query, and then the Selections/Invert menu item can be used to invert the selected set.

The default symbol that is used to mark selected locations is a red wedge (inverted triangle). This marker can be changed by loading a configuration file that specifies a different type of marker, or by using the Map/Settings menu item. When the marker symobl is changed, all previously-selected items will still be marked as they were before the change. Therefore it is possible for the map to display several different types of symbols for selected locations.