How to display a map list as a slide show
With Slide Show, you can display multiple raster maps that are combined in a map list as a slide show in a map window. The maps of the map list are displayed one after the other in the map window at a user-specified rate. A slide show is designed to present multi-temporal changes in maps.
Raster maps that you can include in a map list for a slide show may be:
- satellite images of the same area of for instance different months,
- derived products from satellite images, such as NDVI maps, of for instance different months,
- classified satellite images of for instance different months or years,
- thematic raster maps (e.g. land use maps) of for instance different years.
A slide show is in fact the same as repeatingly replacing raster maps in a map window, e.g. by dragging raster maps from the Catalog one by one into a map window.
To create a map list:
The first step of making a slide show is to create a map list of all the raster maps that you want to show. For more information, refer to How to create a map list.
To start a Slide Show:
There are several ways in which a slide show can be started:
- From the Operations menu in the Main window, choose Visualization, Show Map List as Slide Show, and select a map list in the Show Map List as Slide Show dialog box, or
- In the Operation-tree, open the Visualization, Show Map List as item, double-click the Slide Show item, then select a map list, or
- In the Operation-list, double-click the Slide Show item, and select a map list, or
- In the Catalog, click a map list with the right mouse button, and select Visualization, as Slide Show from the context-sensitive menu, or
- Drag a map list from the Catalog to the Slide Show item in the Operation-tree or Operation-list, or
- Double-click a map list in the Catalog; the map list should contain raster maps which do not use the Image domain nor another value domain (if they do, an interactive color composite will be shown), or
- From the File menu in the Main window, choose Open and select a map list in which the raster maps do not use the Image domain nor another value domain (if they do, an interactive color composite will be shown), or
- Drag a map list to an existing map window. A small dialog box will appear asking you whether the maps in the map list should be displayed as a Color Composite or as a Slide Show; choose Slide Show.
A Display Options dialog box appears for the first raster map of the map list.
- specify the display options, these settings will be used for all the maps in the list.
The Display Options - Map list as slide show dialog box appears.
- specify the number of maps you want to see per minute as the Refresh Rate.
The Slide Show will start after you press the OK button.
Tips:
- A map list can only be created of raster maps that have the same georeference and the same domain.
- If the refresh rate is set to zero, it means that the maps will not be refreshed automatically. To show the next slide, click the Redraw button
in the toolbar of the map window or press Ctrl+R on the keyboard.
- When you create a map list of raster maps that are the outcome of the Apply 3D operation (for instance depicting the same area in three dimensions but from different angles), and display this map list as a slide show, you can obtain a kind of rotating DEM with raster drape. For more information, refer to Display 3D and Apply 3D.
See also:
How to create a map list
Show map list as slide show dialog box
ILWIS objects: map lists