At the zoom levels where 24K maps make sense, I don't see more than ~4 maps being loaded at a time. I tried them at 250DPI. The TIFFs were definitely smaller and the processing went faster, but the contour lines looked pretty jagged at decent zoom levels.
Based on the discussion earlier, I took a look at the SRTM1v3 dataset for creating shapefiles of contour lines. I randomly chose a 1x1 degree tile and followed the instructions on OSM ( http://wiki.openstreetmap.org/wiki/Contours ). The 10 meter contour lines shapefile was 1.7G. I've not tried it again with an SRTM3 file. Hopefully either SRTM3 output shapefiles will either be much smaller or I can figure out how to break them into smaller areas. 73-KY9K/Brian On Mon, Dec 28, 2015 at 11:32 AM, Kurt <[email protected]> wrote: > 93Gb. Hmmmm, better run Xastir on a fast computer then or pick and chose > what one wishes to load. ;-) > I have my local area diplayed and it works pretty good with a Quad core > laptop. Dual core is a little slow. > I found that these GeoPdf files look better when I have the old 2006 Tiger > maps or the 2008 Cloudmade mapsdisplayed concurrently. The roads pop out > better and since the road lines are so narrow in Tiger or Cloudmadeslight > registration errors aren't that noticeable. Many times the registration is > right on target. > > > Kurt KC9LDH > > > From: ZPO <[email protected]> > To: Xastir - APRS client software discussion <[email protected]> > Sent: Sunday, December 27, 2015 7:28 PM > Subject: [Xastir] GeoTIFF USTopo DRGs Available for Washington State > > I've processed the GeoPDF files and set them up for sharing via bittorrent. > The .torrent files for downloading are available at: > > > https://drive.google.com/folderview?id=0B8q7xNreVrjiREI1RkFvMVR4Nms&usp=sharing > > Files were processed at 600DPI with the orthophotos removed and with > PACKBITS compression. I've spot checked about 20 of them in Xastir to make > sure they display properly. Processing the whole state took a few days on a > quad-core i7. > > The Idaho GeoPDFs should be done processing soon. I will get them loaded up > next. I can then either do Oregon or return to the Washington files to make > a set of just the orthophotos based on feedback and interest. > > Answers to a few likely questions: > > - Why bittorrent? > I don't have a server available with unlimited bandwidth. The full set of > WA GeoTIFFs is 93G. Bittorrent provides a very easy and convenient way to > distribute them. Once I get some feedback that they downloads are going > well, I will move the .torrent files to a web server unless someone else > wants to host them. > > - Won't the MPAA/RIAA SWAT teams bust down my door if I use bittorrent? > No. The protocol and program itself are fully legal and don't automatically > download and share anything you don't explicitly tell it to share. I've got > a step further and setup a pair of closed trackers with a whitelist for > only the files I'm posting. Your bittorrent client won't see or touch any > other resources that handle non-legal content unless you download other > torrent files and tell it to do so. > > - How can I help? > Setup a torrent box, download the files, and seed them to help others > download them. I'm currently seeding from a Raspberry Pi 2 with the files > on an external portal hard drive. It uses only a few dollars of power a > year and can sit on the shelf 24x7x365 seeding the torrents. > > Let me know if anyone has any questions or concerns. > > 73-KY9K/Brian > > -- > ---------- > Society is, always has been, and always will be a structure for the > exploitation and oppression of the majority through systems of political > force dictated by an elite, enforced by thugs, uniformed or not, and upheld > by a willful ignorance and stupidity on the part of the very majority whom > the system oppresses. > - Richard K. Morgan > ---------- > _______________________________________________ > Xastir mailing list > [email protected] > http://xastir.org/mailman/listinfo/xastir > > > > _______________________________________________ > Xastir mailing list > [email protected] > http://xastir.org/mailman/listinfo/xastir > -- ---------- Society is, always has been, and always will be a structure for the exploitation and oppression of the majority through systems of political force dictated by an elite, enforced by thugs, uniformed or not, and upheld by a willful ignorance and stupidity on the part of the very majority whom the system oppresses. - Richard K. Morgan ---------- _______________________________________________ Xastir mailing list [email protected] http://xastir.org/mailman/listinfo/xastir
