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Re: Windows freeware for offline editing uploaded GPX tracks

Cross-posted to 2 groups.

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Bernd Rose wrote:
> On Tue, 26 Mar 2024 08:54:10 -0800, Bill Bradshaw wrote:
>
>> I stitch USGS maps together after converting them to tiff.  I have a
>> program that lets me crop the borders off of the tiff.
>
> Why would you do this, when you can download them borderless in the
> first place?? The tiles inside the KMZ format are already borderless.
>
>> What are you using to make the borders transparent and could you
>> outline the process?
>
> Not the whole border, just the white background. There are several
> ways, from selecting a color to be NoData inside the GIS program, to
> using
> gdal or even an image manipulation tool like image magick or graphics
> magick to define a transparency mask. Probably the easiest way to make
> the white background transparent is setting "srcnodata" when creating
> a large virtual raster file from all the single tiles with
> gdalbuildvrt:
>
> https://gdal.org/programs/gdalbuildvrt.html
>
> OTOH, you could forgo transparency completely, though, by using
> gdalbuildvrt with suitable "te" parameters. You get the boundary
> parameters from the doc.kml file inside each KMZ variant. But again,
> why would you go this way, when you could have used KMZ in the first
> place?
>
> And here I am explaining ways to do what I recommended /not/ to do.
> Always the same in these discussions about USGS topo maps.   :-(
>
> Bernd

I did not realize there were borderless files in the KMZ.  I will start by 
looking at these.  I have saved your followup message.

<Bill> 

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Thread

Windows freeware for offline editing uploaded GPX tracks Wolf Greenblatt <wolf@greenblatt.net> - 2024-03-22 01:55 -0400
  Re: Windows freeware for offline editing uploaded GPX tracks "MJP" <KKK@KKK.NET> - 2024-03-22 12:55 +0000
  Re: Windows freeware for offline editing uploaded GPX tracks "MJP" <KKK@KKK.NET> - 2024-03-22 12:57 +0000
    Re: Windows freeware for offline editing uploaded GPX tracks Wolf Greenblatt <wolf@greenblatt.net> - 2024-03-22 10:25 -0400
      Re: Windows freeware for offline editing uploaded GPX tracks "MJP" <KKK@KKK.NET> - 2024-03-22 15:50 +0000
        Re: Windows freeware for offline editing uploaded GPX tracks "Bill Bradshaw" <bradshaw@gci.net> - 2024-03-22 09:28 -0800
          Re: Windows freeware for offline editing uploaded GPX tracks Bernd Rose <b.rose.tmpbox@arcor.de> - 2024-03-22 19:32 +0100
          Re: Windows freeware for offline editing uploaded GPX tracks Wolf Greenblatt <wolf@greenblatt.net> - 2024-03-22 19:04 -0400
            Re: Windows freeware for offline editing uploaded GPX tracks "Bill Bradshaw" <bradshaw@gci.net> - 2024-03-23 08:43 -0800
              Re: Windows freeware for offline editing uploaded GPX tracks Wolf Greenblatt <wolf@greenblatt.net> - 2024-03-24 20:45 -0400
                Re: Windows freeware for offline editing uploaded GPX tracks "Bill Bradshaw" <bradshaw@gci.net> - 2024-03-25 09:08 -0800
                Re: Windows freeware for offline editing uploaded GPX tracks Wolf Greenblatt <wolf@greenblatt.net> - 2024-03-25 15:06 -0400
                Re: Windows freeware for offline editing uploaded GPX tracks Bernd Rose <b.rose.tmpbox@arcor.de> - 2024-03-25 23:20 +0100
                Re: Windows freeware for offline editing uploaded GPX tracks "Bill Bradshaw" <bradshaw@gci.net> - 2024-03-26 08:54 -0800
                Re: Windows freeware for offline editing uploaded GPX tracks Bernd Rose <b.rose.tmpbox@arcor.de> - 2024-03-26 18:45 +0100
                Re: Windows freeware for offline editing uploaded GPX tracks Bernd Rose <b.rose.tmpbox@arcor.de> - 2024-03-26 23:57 +0100
                Re: Windows freeware for offline editing uploaded GPX tracks "Bill Bradshaw" <bradshaw@gci.net> - 2024-03-27 08:51 -0800
                Re: Windows freeware for offline editing uploaded GPX tracks "Bill Bradshaw" <bradshaw@gci.net> - 2024-03-27 12:09 -0800
                Re: Windows freeware for offline editing uploaded GPX tracks Bernd Rose <b.rose.tmpbox@arcor.de> - 2024-03-27 21:35 +0100
                Re: Windows freeware for offline editing uploaded GPX tracks "Bill Bradshaw" <bradshaw@gci.net> - 2024-03-27 13:51 -0800
                Re: Windows freeware for offline editing uploaded GPX tracks Bernd Rose <b.rose.tmpbox@arcor.de> - 2024-03-28 07:02 +0100

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