Thank you Tom. Sent from Guy's iPhone
> On May 29, 2023, at 13:50, Tom Russo <ru...@bogodyn.org> wrote: > > On Mon, May 29, 2023 at 12:56:55PM -0500, we recorded a bogon-computron > collision of the <kc5...@gmail.com> flavor, containing: >> I have been away for a very long time so I am sure this has been asked but >> I am not finding the answer and I am not 100% sure this is feasible. I did >> a fresh installation of 2.1.7 on a fresh Ubuntu installation. I have >> downloaded and extracted north-america-latest.osm from Geofabtrik. I am not >> seeing how to put it in service. I moved the extracted file to >> /usr/local/share/xastir/maps/Online but it does not show up in the map >> list. Am I missing a geo file or is this not supported or practical since >> it is a huge file? >> >> Normally I try to cache an area I am going to be in ahead of time in case I >> do not have reliable cell service. > > Xastir doesn't read .osm files directly. You must process them into > shapefiles and provide a suitable ".dbfawk" file to get them rendered > properly. > Or perhaps you can download them directly as shapefiles instead. See, for > example: > > https://wiki.openstreetmap.org/wiki/Shapefiles > > > The "Online" directory for Xastir maps is not a collection of actual maps, > but of special files that direct Xastir to access online tile servers. The > "geo" files direct Xastir to the appropriate server and directory on that > server to which it should connect to grab tiles as it needs them. > > If you're trying to download maps to use while your station is offline, such > as while running APRS at an event, then shapefiles is the way to go. > > If you're hoping to access a specific on-line tiled map set and the ones we > already have "Online" geo files for are not adequate, then you'd have to > duplicate and modify one of the provided Online/*.geo files to get at the > particular map you want. > > At the moment I use the OSM_tiled_mapnik online map for my home station and > it is quite nice. > > If you *are* looking for offline maps and choose shapefiles, be aware that > enormous, dense shapefiles can be very slow to render, as Xastir must read > in the whole thing sometimes. There is an attempt to optimize the access of > the file using an "rtree" data structure that keeps track of which shapes in > the file intersect the current view and only reads those in again when it > needs to, but to reduce long-term memory usage this cache is purged when your > view hasn't changed in over an hour. That is, it speeds things up if you're > changing views a lot, but if you have an enormous shapefile and only change > views occasionally, the first change after many hours have passed might take > a really long time to redraw as it rebuilds the index and rtree data. > > For this reason, it is often good to break enormous shapefiles up into smaller > chunks. There are some tools for doing that (gdal's OGR tools can help) but > that's another story for another time. > > -- > Tom Russo KM5VY > Tijeras, NM > > echo "prpv_a'rfg_cnf_har_cvcr" | sed -e 's/_/ /g' | tr [a-m][n-z] [n-z][a-m] > > _______________________________________________ > Xastir mailing list > Xastir@lists.xastir.org > http://xastir.org/mailman/listinfo/xastir _______________________________________________ Xastir mailing list Xastir@lists.xastir.org http://xastir.org/mailman/listinfo/xastir