1.6. Summary

In this lesson you learned about techniques to dynamically portray geographic information for LBS maps. These considered different physical and human constraints that come from mobile devices and the types of environments these are employed in. In particular, you explored five main techniques for portrayal in LBS.

Progressive vector transmission coped with the issue of low network connectivity and restrictions on the device such as the processor speed and the size and resolution of the screen. This limited the amount of information that need to be displayed at any particular time.
The cluster and expand method dealt with the issue showing large volumes of points of interest which can overlap and be hard to read or interact with. The method reduced the level of detail by defining clusters and showing these using central points that could be expanded on interaction.
Variable scale projections tackled the problem of small screens by changing the scale of the map around a central focus of interest (postioned on the user's location).
Schematic maps can abstract information accord to factors involved in the map use. In particular you looked at maps for describing routes and the important factors that these need to show.
Finally, you considered how route maps can be translated into spoken instructions and the steps needed to perform this operation.

Cartography for Swiss Higher Education

1.6. Summary