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Cartographic Issues for Mobile Devices

This entry is for the group project examining cartographic issues related to mobile devices.

Comments

Hello Ina & Yongli,

I did some journal researching and came up with two helpful articles through the U Library's website. I will bring a copy of each that we can review tomorrow, but if you wish to reference them yourself, the titles are:

1) "Handheld GPS & Mobile Mapping". Xiao, B. & Zhang, K. Cartography, Vol. 31, No. 1, 99-108

2) "Flexibility by Design: How Mobile GIS Meets the Needs of Archaeological Survey". Tripcevich, Nicholas. Cartography & GIS, Vol. 31, No. 3, July 2004, pp. 137-151

Ina, I remember the handful of articles you showed us -- are they available through the Library? If so, perhaps you could post those resources.

Also, are there any ideas for an interview? We will probably need to contact somebody from MetroTransit, but as to whom I am not sure at this point.

Looking forward to some productive dialogue on our project.

Adam

Hi guys,
All the articles I had are available on the web. I'll post the sites when I get home today.

As for interviewing, I’m not exactly sure who in the MetroTransit would have an idea about displaying bus routes on small screen devises. I see from their web site that they have internet transit system maps, but I don’t see that they have anything with portable devises.

If we want to interview someone I think it might be more useful to talk to someone who works with making PDA or cell phone maps (like Verizon). Anyway, we’ll talk more about this in class today.
Ina

Hi again guys,
I revised the statement. It became a bit shorter, but hopefully more to the point than the original one. Feel free to suggest where we need to improve it.

For this project, we would like to study how maps can be presented on a small screen, for instance on handheld devices such as PDA and cell phones. Our paper will consist of a brief background about the challenges with regards to cartographic methods and existing technology in handheld devices. It will also address a couple of case studies where issues with mobile cartography have been addressed. We further plan to use the Twin Cities bus route system as a basis for our study and we will attempt to suggest how information about the bus routes can be presented on a mobile devise.

Ina

Thumbs up, Ina. You may want to change "devise" to device.

Hi,Ina and Adam,

Thank you for your work. I think it is better for me to look for a couple of cases for this project, if you agree. I will share with you what I can find soon. Have a nice weekend.

I have sent you some articles via Email. Hope you will find them helpful.

I think Ina's revision is very nice. What I meant just now is to be responsible for the second part - to find a couple of cases and summarize them.
Please let me know if you happen to read some real cases.

As for the interview, it is hard to say whether MetroTransit has such an idea. We may first contact someone who has the experience of making mobile maps and explore the possiblities. Then if possible, we may also contact MetroTransit and see what comments they will have on the project.

Hi,
With a couple of very small changes, this is our final project statement:

For this project we would like to study mobile cartography by looking at
how maps can be presented on a small screen, for instance on handheld
devices such as PDA and cell phones. Our paper will consist of a brief
background about the challenges with regards to cartographic methods and
existing technology in handheld devices. It will also address a couple of
case studies where issues with mobile cartography have been addressed. We
further plan to use the Twin Cities bus route system as a basis for our
study and we will attempt to suggest how information about the bus routes
can be presented on a mobile device.

Ina

Hi guys,
This is the web site I mentioned where they built a bus route system on the top of a google map. It’s simple, but quite nice.

http://thebus.ca/

Ina

Hey...
what happened to one of my posts here (from April 5th)?? I posted the names of 3 articles, but the post has disappeared... Strange.
Ina

Are you sure it's in this page? You can search the entire blog for text from that posting.

Yeah, I tried that but it's vanished. Ina

Hi guys,
I was thinking that it might help us to structure our writing a bit if we make a (as detailed as we can) draft table of content. What do you think? We could work it out here on the blog.

Ina

I think that it is helpful to our writing. We can talk about it after class today.

Hi guys,
It’s getting closer to the end of the semester and I’m feeling pressured to finish this project as lots of other things are coming up in the next couple of weeks. So is it possible to meet up after class tomorrow (if we don’t get time during the class to work on this) and discuss our project? So far I have written about the advantages and disadvantages of displaying maps on mobile devises. Now I am writing about how to present information about the Twin Cities bus route on a cell phone. I would really like some input from you guys on this as it is the main part of the project. Also, can you guys bring a copy of what you have written to distribute to each other so that we can get a better idea on where we stand and what we need to do before the presentation?
Ina

Hello,

I have been finding good research about the background of mobile GIS and cartography, much of it coming from the TI Munich. So far, I have split my writing into two categories, one covering the background of handhelds as it applies to GIS and the other presenting past case studies of cartographic principles. Hopefully they will serve as a backdrop to our bus line. One such project in Vienna will be particularly useful. Please see the next post with a brief list of the points I have so far.

BRIEF BACKGROUND OF HANDHELDS

PDA’s synchronized with desktops to deliver packages of information

Bluetooth—wireless LAN for mobile devices, with bandwidths of 22-40 mbit/s. Often used with GPS hardware card

Most mobile GIS works with GML, converted to Extensible Stylesheet Language Transfer (XSLT), then to Scalable Vector Graphics (SVG)

Open System Graphics (OpenSG) Fast, real time display

Issues:
-More expensive to set up programs for mobile devices
-Few standards exist
-Low battery power
-Few studies on screen displays
-Representing complex objects with raster (e.g., circles)
-Role of semantics, appropriate graphical metaphors

Opportunities:
-GPS widely available

SIGNIFICANT MOBILE VIZUALIZATION RESEARCH PROJECTS

Cyberguide Project – mid 90s – used a database of pre-made bitmaps on the Apple Newton

Guide Project at Lancaster University
(Cheverst 2000)

Ericsson Eurolab – Used Java and GPS, data displayed as scanned raster maps of city. Innovations include panning, layers
(Kreller 1998)

Vienna Tourist Project at Technische Universitaet Wien
Used GPS auto-positioning to track route of tourist along a selected path. Entire route displayed at two scales: 1:25,000 for overview maps and 1:7,500 for special interest points. Screen resolution: 120 x 320. Comprehensive layer technology, limited viewable area to path and some context.

Other features:
-2D landmarks or “birds-eye? map
-Graphical metaphors
-Consistent hierarchies in buttons
-“tool tips?, quick explanations of graphics
-Client-side based, streaming downloading of objects, info


Hi guys,
About the semantic interoperability exercise:
I'm a bit confused about a couple of things. Question 1: What steps need to be undertaken? For what? To be able to integrate the databases? Or something else? I'm a bit clueless what to write on this one.
One of variables under PaveStat is "resurf". What does this mean?

Apart from that I have finished the other points. I'll send you what I have written. You guys need to add your thing on question 5. I have also made a data model. I'll send that too. Tell me what you think of it.
Ina

Question 1: For making a datamodel for integrating the two data schemes and supporting the applications.

Question 2: resurf is the date the road segment was resurfaced.

I made a few changes to the model + description. They include:

1) move accidents:real from Road to TrafficFlow
2) added to 1st, 4th and 5th questions

I sent it by email at 9pm on Wed.

Adam

Thanks Adam. I just made the slides. I'm sending them to you both. Yongli - let me know if you have anything to add or change.
Ina

maybe we need to add some contact information to question7.

maybe we need to add some contact information to question7.

OK. I added that.
Ina

Guys....
I'm still waiting for some kind of a comment on my suggestion on how the system will work and what screens will be displayed.
Ina

Hi Ina-
I have read your suggestions for the system. I am also still working on my section and will have time to complete it and respond to your suggestions by tomorrow evening, probably at around 11 or 12. Please look for an email with both of these items.

Thank you,
Adam

Comments on bus route system proposal:

-floating pop-ups good idea
-consider using existing "trip planner" service, with options to get current location with GPS AND TO query a trip using floating basemaps with block numbers and pop-up street names
-also include quicker option to search by route
-use panning at 2 scales
-include option to turn landmark layers on/off

Perhaps we can review this tomorrow in class.

Follow-up to last post:
the article I sent about a mobile-based bus line has a good section about textual commands.

http://www.scs.org/getDoc.cfm?id=1709

Guys...
check your e-mail about meeting tomorrow.
Ina

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