On 4/12/06, Jeroen Vanattenhoven <[EMAIL PROTECTED]> wrote: > > Thanks for the information Bill. > > I know this is a generic mapping problem. Is there online material about > these problems? > > The problem of the icons still remains when creating level of detail > zooming. We allow the user to turn the map. So Icons will have to be > rotated and repositioned. Is there an easy way to do this, or do you > have to calculate it everytime and update the icons dynamically? I heard > someone talk about "labelers" which would be software components which > where responsable for labeling on maps. Can you point me to any > documentation about that?.
Documentation?: I only can share you my experience (20(s) yrs graphic programing). Since your Icon is a bitmap. 1- In reservation of the quality it only do good if you rotate it 90-180-270 or mirror it. (other wise the qulaity is not good sometime awful). 2- The quality of an scaled bitmap is fairly OK if you scaled down, but scale up ---> uhm, uhm . . . not recommended. 3- Recomendation: Because the Icon it should be small it does not cost you alot to have them converted into vectoring graphic presentation (SVG is one). Best Regards Phi Regards, > > Jeroen > > Bill Thoen schreef: > > Jeroen, > > This is a generic mapping problem, not unique to SVG. It's similar to > > the problem of how do you represent a city? At large scales a city is a > > multi-polygon region, but at smaller scales it eventually becomes a > > point and at still smaller scales, it shouldn't appear at all (unless > > it's a particularly big city or the focus of the map.) Likewise, > > labeling style, positioning and density will change with scale or you'll > > find that at some scales the map is unreadable. > > > > There's all kinds of methods to control cartographic information > > density, but I think one of the best and simplest is to pre-define fixed > > scales (e.g. city-wide, district, neighborhood, street, and property) > > and design layers to look good at each pre-set scale. Then when you > > display the map set only the layers approriate for the current scale to > > 'visible' and hide all the rest. You might also restrict the user to > > choosing only those fixed scales that you have pre-defined and know will > > look good. An example of this method would be MapQuest and I think > > Google maps. > > > > - Bill Thoen > > > > > > Jeroen Vanattenhoven wrote: > > > > >Currently I have a city map with a hiking route. I have Points of > > >interest icons on the map. Some of those are points along the route. So > > >I also have icons for the points along the route. For the first point > > >for example I have a number 1 icon and a point of interest icon. For > the > > >second point I have a number 2 and a number 3 icon, and a point of > > >interest icon. All belonging to the same point. > > > > > >How do you display that? Because when zooming in, the number icon and > > >the poi icon will have more and more distance between them. > > > > > >How do you handle the problem of overlapping icons? > > > > > >How do you handle the problem of multiple icons belonging to the same > > >geographical point. > > > > > >This is for a digital hiking guide on pda. So for the users > convenience, > > >the map can also be rotated. This means the icons also have to be > > rotated. > > > > > >Jeroen > > > > > >Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm > > > > > > > > > > > >----- > > >To unsubscribe send a message to: > > [EMAIL PROTECTED] > > >-or- > > >visit http://groups.yahoo.com/group/svg-developers and click "edit my > > membership" > > >---- > > >Yahoo! Groups Links > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ----- > > To unsubscribe send a message to: > > [EMAIL PROTECTED] > > -or- > > visit http://groups.yahoo.com/group/svg-developers and click "edit my > > membership" > > ---- > > > > > > > > SPONSORED LINKS > > Xml format > > < > http://groups.yahoo.com/gads?t=ms&k=Xml+format&w1=Xml+format&w2=Svg&w3=Data&c=3&s=35&.sig=u8RdjEjLCbPTzkUjsFG_JA > > > > Svg > > < > http://groups.yahoo.com/gads?t=ms&k=Svg&w1=Xml+format&w2=Svg&w3=Data&c=3&s=35&.sig=BrpyGiBcZ6vcQXDJ7ktaiw > > > > Data > > < > http://groups.yahoo.com/gads?t=ms&k=Data&w1=Xml+format&w2=Svg&w3=Data&c=3&s=35&.sig=CrK_fWaLZ-AZKa5FK8rTGA > > > > > > > > > > ------------------------------------------------------------------------ > > YAHOO! GROUPS LINKS > > > > * Visit your group "svg-developers > > <http://groups.yahoo.com/group/svg-developers>" on the web. > > > > * To unsubscribe from this group, send an email to: > > [EMAIL PROTECTED] > > <mailto:[EMAIL PROTECTED] > ?subject=Unsubscribe> > > > > * Your use of Yahoo! Groups is subject to the Yahoo! Terms of > > Service <http://docs.yahoo.com/info/terms/>. > > > > > > ------------------------------------------------------------------------ > > > > Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm > > > > ----- > To unsubscribe send a message to: > [EMAIL PROTECTED] > -or- > visit http://groups.yahoo.com/group/svg-developers and click "edit my > membership" > ---- > Yahoo! Groups Links > > > > > > > [Non-text portions of this message have been removed] ----- To unsubscribe send a message to: [EMAIL PROTECTED] -or- visit http://groups.yahoo.com/group/svg-developers and click "edit my membership" ---- Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/svg-developers/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
