On Fri, Sep 07, 2012 at 12:04:50PM -0500, we recorded a bogon-computron collision of the <[email protected]> flavor, containing: > On Fri, Sep 7, 2012 at 11:07 AM, Tom Hayward <[email protected]> wrote: > > Why is Xastir slow to render raster maps? I'm curious what is actually > > happening behind the scenes. It appears that Xastir is re-projecting > > the raster maps, requiring an expensive render. Why not just > > re-project the APRS stations and any shapefile overlay to match the > > raster tiles? Wouldn't this be much faster? > > If there were only 2 choices (as your question sort of implies), I'm > pretty sure the developers would have done it that way. > > Since xastir supports so many different maps (formats, projections, > yada yada yada), each one gets handled on the fly. > > Now, some sort of "no monkeying required" format might be nice, along > with some tools to re-format (pre-render?) your favorite maps...
Minimal monkeying (with maximum georeferencing accuracy) is GeoTIFF in WGS84 lat/lon format. Tool is gdalwarp. Command line guidelines are given in README.MAPS, mostly referencing how to make rasters usable that are given in projections Xastir can't use, but equally applicable for warping them to the simplest format that requires minimal computation. -- Tom Russo KM5VY SAR502 DM64ux http://www.swcp.com/~russo/ Tijeras, NM QRPL#1592 K2#398 SOC#236 http://kevan.org/brain.cgi?DDTNM "And, isn't sanity really just a one-trick pony anyway? I mean all you get is one trick, rational thinking, but when you're good and crazy, oooh, oooh, oooh, the sky is the limit!" --- The Tick _______________________________________________ Xastir mailing list [email protected] http://lists.xastir.org/cgi-bin/mailman/listinfo/xastir
