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Re: [aprsisce] Re: Getting OSM tiles for offline use

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  • Colin M0XSD
    Hi Lynn, Mine is creating Directories with Leading Zeros *even if* there are single digit directories already there. 73, Colin.
    Message 1 of 9 , Apr 2, 2012
      Hi Lynn,

      Mine is creating Directories with Leading Zeros even if there are single digit directories already there.


      On 02/04/2012 16:56, Lynn W Deffenbaugh (Mr) wrote:

      Leading zeros created is expected, UNLESS there already exist single digit directories, possibly for all zoom levels zero through 9.

      I'll have to look into the code that's supposed to be adapting to this.

      Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

      On 4/2/2012 12:31 PM, Mason, Billy (list accts) wrote:

      I too can verify that directories with leading 0's are being created. Just tried it on a brand new computer here in the office, and now have map directories 01 through 17 appearing in my OSMTile directory.

      On Mon, Apr 2, 2012 at 9:38 AM, Lynn W Deffenbaugh (Mr) <kj4erj@...> wrote:

      There's logic in APRSISCE/32 that's supposed to detect if single digit directories have a leading zero or not.  Any new directories it needs to create will follow what was detected but the default is to create directories WITH the leading zero as this allows pre-Vista versions of Windows to sort by name a bit better.

      If someone can devise a test of this logic, please do and let me know the results.  It'd be a matter of renaming all of your <=9 zoom directories to have no leading zero and then start up APRSISCE/32 using that tile set.  If leading zero directories re-appear, then I've got a bust.  If those zoom levels still have maps, then my logic is working correctly.

      Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

      On 4/2/2012 9:19 AM, Fred Hillhouse wrote:
      I think all the other applications that use the SlippyMaps use no leading 0 for zoom levels <=9. I thought had a fix that would allow APRSISCE/32 to use the single digit levels.
      In reality, the tiles at 9 and below don't add up to many in size or number any so I have both.
      Best regards,
      Fred, N7FMH

      From: aprsisce@yahoogroups.com [mailto:aprsisce@yahoogroups.com] On Behalf Of Clive
      Sent: Sunday, April 01, 2012 17:39
      To: aprsisce@yahoogroups.com
      Subject: [aprsisce] Re: Getting OSM tiles for offline use


      Hi Lynn,
      Yes, sorry, I forgot to make that point as I'm usually only doing it for a relativly small area, i.e. for an event or somehwere I'm walking and then I only go to zoom 15 or 16.
      Obviously if you're getting the tiles for an event and several people need to use them then download only once and 'pass the memeory stick'.

      For larger areas generating your own tiles from a OSM planet file (of the appropriate region) is the way. There are sveral tools for doing this but I've only tried Mapertive. I found getting going to be a bit confusing at first but I think that's mainly not being familar with the terminology.

      Another thing to be aware of is the folder names for the OSM zoom levels. APRSISCE expects a leading zero for those below 10, i.e. '09' but OSM for APRS-GO & at least one other tool omit this leading zero from the zoom level folder name, i.e. '9'.
      This threw me for a while as I was trying to use the same OSM folder set between two applications on my pocket PC. The solution was to use a script (mortscript) to change the folder names depending on which application I choose.

      73 de Clive, G0CHO

      --- In aprsisce@yahoogroups.com, "Lynn W Deffenbaugh (Mr)" <kj4erj@...> wrote:
      > Please also refer to the acceptable use policy for OSM at
      > http://wiki.openstreetmap.org/wiki/Tile_usage_policy particularly the
      > following:
      > >
      > > Bulk Downloading
      > >
      > > Bulk downloading is *strongly discouraged*. Do not download tiles
      > > <http://wiki.openstreetmap.org/wiki/Tiles>unnecessarily.
      > >
      > > In particular, downloading significant areas of tiles at zoom levels
      > > 17 and higher for offline or later usage is *forbidden* without prior
      > > consultation with a System Administrator
      > > <http://wiki.openstreetmap.org/wiki/System_Administrators>.These
      > > tiles are generally not available (cached) on the server in advance,
      > > and have to be rendered specifically for those requests, putting an
      > > unjustified burden on the available resources.
      > >
      > > To avoid having your access blocked, please discuss your requirement
      > > with system administrators
      > > <http://wiki.openstreetmap.org/wiki/System_Administrators>either via
      > > their wiki pages or on the IRC channel
      > > <http://wiki.openstreetmap.org/wiki/IRC>prior to starting.
      > >
      > At least by using APRS-Go, that'll be the app that gets blocked and not
      > APRSISCE/32! But the general rule of thumb is that you should not get
      > carried away, especially at the higher zoom levels where you're unlikely
      > to view 75% of the tiles that you download.
      > Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32
      > On 3/31/2012 10:08 AM, Clive wrote:
      > >
      > >
      > > If you're wanting to use APRSIS CE/32 away from an internet connection
      > > you need to download the OSM map tiles for the area you want in
      > > advance. For example I use it running on a HP pocket PC (iPaq) in my car.
      > > You can use APRSIS CE/32 to to this for you using the prefetch feature
      > > but it only gets the current zoom level plus two more and I find
      > > moving the map area about can be a bit tedious.
      > > To make it easier I use a program called 'OSM for APRS-Go' (APRS-Go
      > > being similar to APRSISCE but seems to have fallen by the wayside)
      > > which allows the downloading of the OSM tiles for an area at 5
      > > different zoom levels at a go. That is you select an area at a
      > > particular zoom (in a way I find a bit simpler than APRSIS) and it'll
      > > download the tiles for that area plus all the corresponding tiles at
      > > the next 4 zoom levels, i.e. if you start at zoom 9 you'll get that
      > > area at zooms 9,10,11,12 & 13.
      > >
      > > The prog and instructions can be found here;
      > >
      > > http://www.aprsgo.com/OSM_for_APRS/
      > > <http://http://www.aprsgo.com/OSM_for_APRS/>
      > >
      > > 73 de Clive, G0CHO
      > >
      > >

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