Informative Maps on pda-phones

Download 2.99 Mb.

View original pdf

Page	18/33
Date	23.10.2022
Size	2.99 Mb.
	#59791

1 ... 14 15 16 17 18 19 20 21 ... 33

Chui (2006)

3.1.6. Photo Display

3.1.5. Zoom In/Out
Since the maps are used to be viewed on PDA-phones, the usefulness of the maps to users has to be carefully considered. Although different zoom levels can be specified when getting the map from centamap via SUNDAY LBS web service
[19], two zoom levels of maps are provided in this project (Figure 23). First of all, there exist some distortions on the maps beyond the zoom level = 4 such that the building names cannot exactly match with the locations. It would cause misunderstanding to users and thus, maps with zoom level = 4 are chosen to be applied as the most zoomed out version. It is unwise to take times to load a useless map. Excessive zoomed-in maps are not very useful with showing only large scale of the building while the optimal route calculated cannot be shown. The maps of zoom level = 2 can show only few roads and the viewing of the large scale buildings requires scrolling on the
PDA-phones which is neither convenient nor essential. Zoom level = 3 is chosen be the zoomed-in version of the map. In case, users would like to know more details about the current location and how they should walk in order to go to the destination, they can simply switch to the photo display which would be more helpful.
3.1.6. Photo Display
To be more informative, photo display is suggested for users to have more information about the route to go to the destination. Photos are originally designed to betaken for each coordinates sample, i.e., one photo for one coordinates sample. However, it may not be very useful to show the users with the photo sequences of the proposed route. Moreover, loading a sequence of photos on PDA-phones would be time-consuming. Thus, photos are suggested to show users with the direction that they are going to walk from the current location

CS) Informative Maps on PDA-phones
Chui Pui Ling Page 35 to the next location. To do this, two photos for every linkage of the coordinates samples are taken which include the forward and backward directions. The quality and the resolution of the photos are kept low due to the limited resources of PDA-phones. Here are some examples

Download 2.99 Mb.

Share with your friends:

1 ... 14 15 16 17 18 19 20 21 ... 33