Mideast Maps Example

Input Data

The input data:

consists of a list of maps (JPEG images), with information about each map such as the type of map and the country shown on the map.

The input file looks like: Bahrain area /p/devise/demo/dat/Maps/Bahrain_area.jpg http://www.lib.utexas.edu/Libs/PCL/Map_collection/Atlas_middle_east/Bahrain_area.jpg 98 -0.5 -0.5 /p/devise/demo/dat/Maps/comments Bahrain econ /p/devise/demo/dat/Maps/Bahrain_econ.jpg http://www.lib.utexas.edu/Libs/PCL/Map_collection/Atlas_middle_east/Bahrain_econ.jpg 100 -0.5 -0.5 /p/devise/demo/dat/Maps/comments ...

Problem

We have a number of maps of mideastern countries. For most of the countries there are several different maps, such as population density and land use. We want to be able to view the maps easily.

Visualization

Click here to see our model of creating visualizations.

The visualization is created as follows:

Define the 'MAP' window and its view (with country as the X axis and map type as the Y axis, both with offsets to account for the size of the map). The shape type is Image.
Define the 'Control' window and its view (with country as the X axis and map type as the Y axis).
Define the 'OverView' window (the one with 'Qatar' and 'pop' in it) and its views. Both views have country as the X axis and map type as the Y axis, and in both the symbol type is Text Label. The only difference is that in the left view the text for the label is country and in the right view the text is map type.
Define the 'Comments' window and its view. This view draws its symbol at a fixed position. The symbol type is Tcl/Tk Window.
Create an X-Y cursor from the view in the 'MAP' window to the view in the 'Control' window.
Create an X-Y link between the view in the 'MAP' window and the views in the 'OverView' window.
Create a record link from the view in the 'MAP' window to the view in the 'Comments' window. This link allows the Tcl script in the 'Comments' window to display information about the map that is shown in the 'MAP' window.

Observations

You can select the map to view by clicking in the 'Control' window. When you select a map, the country and type of map are shown in the 'OverView' window. Comments about that map are shown in the 'Comments' window.

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