[OZAPRS] 1:250K Mosaic

[ANDREW MCDADE]

Yes a 702Mb ecw file ends up at 1.4Gigs. Its getting a bit large for a
single file !!.  In fact Uiview is a bit limiting on the maximum file size
it can use. At least it used to be in older versions. I used to try to
load
in 1:50K topo maps at around 20Mb , which didnt work. I had to use colour
depth deduction and resolution reduction in order for these sized files to
load. I havnt tried this in later versions on uiview however. It would be
great if xastir could be made to handle the ecw format directly. Im sure
it
would be in the realms of possibility.

73 .. Andrew .. VK5EX


----- Original Message -----
From: "Richard Hoskin" <vk3jfk at amsat.org>
To: <ozaprs at marconi.ics.mq.edu.au>
Sent: Tuesday, April 12, 2005 9:04 PM
Subject: RE: [OZAPRS] 1:250K Mosaic


>
> You can convert ECW to PNG or JPG etc but the file size can be over
double
> the original ECW file . It can take several days to do on a fast PC.
>
> It's best to do it in small blocks and then stick the blocks together.
>
> My understanding is UI-View reads the full map into memory and displays
it
> where as OZiexplorer just reads the bit it requires into memory. Hence
> UI-View map size limited to your physical hardware & OS capabilities
etc.
>
> Cheers
> Richard
> VK3JFK
>
>
> > -----Original Message-----
> > From: ozaprs-bounces at marconi.ics.mq.edu.au [mailto:ozaprs-
> > bounces at marconi.ics.mq.edu.au] On Behalf Of ANDREW MCDADE
> > Sent: Tuesday, 12 April 2005 2:51 PM
> > To: vk4tec at tech-software.net; ozaprs at marconi.ics.mq.edu.au
> > Subject: Re: [OZAPRS] 1:250K Mosaic
> >
> > Thr 1:250K mosaic is in fact a single 702 Mb file. It is also in ECW
> > format,
> > which is fairly specific to mapping type apps. ie. Oziexplorer etc.
There
> > is
> > absolutely no way Uiview will handle either this file size or this
file
> > type. Im not fully up with Xastir, but I would assume that unless it
can
> > handle the ECW file format ,  it would be a struggle to work. Of
course
> > there is nothing to say that the ecw format could be supported at some
> > point
> > by xastir and other apps.
> >
> > 73 .. Andrew ..  VK5EX
> >
> >
> > ----- Original Message -----
> > From: "Andrew Rich" <vk4tec at tech-software.net>
> > To: "ANDREW MCDADE" <amcdade at iprimus.com.au>;
<vk4tec at tech-software.net>;
> > <ozaprs at marconi.ics.mq.edu.au>
> > Sent: Tuesday, April 12, 2005 9:27 AM
> > Subject: Re: [OZAPRS] 1:250K Mosaic
> >
> >
> > > So Andrew you are saying that UI-VIEW does not handle the mosaic
> > > image ?
> > >
> > > I am keen to try xastir
> > >
> > > > Gday Andrew and others,
> > > >
> > > > Yes I use the 1:250K mosaic a lot of the time. Along with Darryls
> > > programs
> > > > oziaprs and aprsnet.as well as Uiview and Oziexplorer. It all
works
> > > rather
> > > > well. Unfortunatley there doesnt appear to be an aprs program that
> > > can
> > > > handle the large size ie 600 Meg plus of the 1:250K mosaic in its
> > > own right.
> > > > 73 ... Andrew .. VK5EX
> > > >
> > > > ----- Original Message -----
> > > > From: "Andrew Rich" <vk4tec at tech-software.net>
> > > > To: "Ozaprs at Marconi.Ics.Mq.Edu.Au" <ozaprs at marconi.ics.mq.edu.au>
> > > > Sent: Monday, April 11, 2005 7:06 PM
> > > > Subject: [OZAPRS] 1:250K Mosaic
> > > >
> > > >
> > > > > Gudday,
> > > > >
> > > > > Wonder if anyone is using the recently released NATMAP 250K
Mosaic
> > > topo
> > > > maps
> > > > > of OZ for APRS ?
> > > > >
> > > > > There is two types of product, 4xCD and 2xDVD
> > > > >
> > > > > I am particularly interested in the MOSAIC or "continous" map
> > > > >
> > > > > http://www.ga.gov.au/nmd/products/maps/raster250k/
> > > > >
> > > > > Cheers Andy VK4TEC
> > > > >
> > > > > _______________________________________________
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> > > > > http://marconi.ics.mq.edu.au/cgi-bin/mailman/listinfo/ozaprs
> > > > >
> > > > >
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