I appreciate you looking out for me and trying to make sure I don't waste too much time. Have a good trip, ...jerry
On Thu, Jun 10, 2010 at 10:19 AM, Curt, WE7U <[email protected]> wrote: > On Thu, 10 Jun 2010, Jerry Dunmire wrote: > >> I spent well into late last night (this morning) trying to find the >> right place to put in the transition from continuous scaling to levels >> but I'm not quite there. I know what needs to be done but I'm still >> learning the code and looking for a single place that covers all the >> transitions. > > Basically you just need one image that is slightly (or more) larger > than the current Xastir viewport extents, then tell Xastir to use it > and Xastir will use only what fits in it's viewport. > > >> I would also like to propose, to be implemented at the same time as >> the scaling change, a user option to use either the OSM levels or the >> linear scaling. My reasoning is that scaling bit maps generally >> produces blocky and/or blurry images. My personal preference is to >> trade off better looking maps for less flexibility in setting the >> scale, but I understand that others will have a different preference >> and I think I can accommodate both. > > We've had excellent luck so far in doing it the one way. I suspect > the stuff you've seen elsewhere before just wasn't implemented > properly, or they tried to scale too much. We don't do that. I'd > vote no on the above proposal just 'cuz it would complicate multiple > places in the code for no net gain. I'm just one vote though. > > >> I also want to get to the point where we can cache and use the OSM >> tiles rather than large bitmaps. A slippy map implementation would be >> great, but probably beyond my present skills. The use of tile caching >> should provide a faster interface and eliminate large downloads for >> small position changes. > > If we could get to caching tiles we could fix the problems we have > with MS Terraserver as well, when the map view gets too wide. They > feed us something other than what we requested in that case, and it > therefore gets georeferenced wrong by Xastir. Requesting tiles in > that case would bypass that problem. Tiles could help with other > internet map sources too I'm sure. > > >> I have to travel for a couple of days starting tomorrow afternoon. So >> my goal, assuming you are not adamant that I not do it, is to fix the >> transition error before I leave. Then I can get started on the linear >> scaling when I get back. >> >> Will that be OK? > > I'm not adamant. Just didn't want you to waste your time. Sounds > like that's a moot point. Have fun! > > I'm headed out too, perhaps tonight. Hopefully will leave a nice > track for the 500 miles I'll be driving. > > -- > Curt, WE7U. <http://www.eskimo.com/~archer> > APRS: Where it's at! <http://www.xastir.org> > Lotto: A tax on people who are bad at math. - unknown > Windows: Microsoft's tax on computer illiterates. - WE7U. > The world DOES revolve around me: I picked the coordinate system!" > _______________________________________________ > Xastir-dev mailing list > [email protected] > http://lists.xastir.org/cgi-bin/mailman/listinfo/xastir-dev > _______________________________________________ Xastir-dev mailing list [email protected] http://lists.xastir.org/cgi-bin/mailman/listinfo/xastir-dev
