My icons are already SVG icons. For testing purposes I used the ones that are available on www.carto.net.
Phi Tran schreef: > 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! 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