Hi All,

I import single DRG files into .map files.  Is it possible to display
half of one map and half of another map in the view?  If so, how do I
do it?

I'm guessing that a workaround for this is to somehow combine the
images into a single file, then import it into a single map file.

Any suggestions would be appreciated.  Thanks.

--Ryan

Hello all.
  I have been using Ozy for 3 or 4 years now with great success with my
trusty Magellan 315. I recently got an explorist xl, now I understand
that Ozy will not upload maps to my new xl what I am looking for is a
conversion tool that would take the maps I have now and convert them
to the format the xl needs. The fill extension the xl looks for
is .imi for detailed maps and .mgi for background maps.
  I would like to convert some maps I have made in Ozy  using aerial
photos they would be great on the xl's large screen.

Thanks
Mitch

--- In OziUsers-L@yahoogroups.com, "mabrub9" <mabrub9@...> wrote:
>
> Hello all.
>  I have been using Ozy for 3 or 4 years now with great success with
my
> trusty Magellan 315. I recently got an explorist xl, now I understand
> that Ozy will not upload maps to my new xl what I am looking for is a
> conversion tool that would take the maps I have now and convert them
> to the format the xl needs. The fill extension the xl looks for
> is .imi for detailed maps and .mgi for background maps.
>  I would like to convert some maps I have made in Ozy  using aerial
> photos they would be great on the xl's large screen.
>
> Thanks
> Mitch

Mitch,

Ozi maps are exclusively in what is known as raster bitmap format,
which is a brute force orderly description of what color each pixel is,
row by row, column by column.  Your Explorist GPS uses maps which are
exclusively in what is known as vector format, which is a simple point
to point description of how to draw the lines on the map.  As such,
there isn't any easy way to convert from raster format to vector
format.  You can trace tracks over features on a raster map and then
export the tracks as vector shapefiles, which may be convertible to
something usable by your explorist.  Maybe check in the map authors
group for someone who knows the details for the explorist GPS.  There
are semi-automated tools for doing raster to vector and I'm certain
that at least one person here, will post some links to what end up
being useless for this purpose, tools.  Most of them are way overpriced
considering how poorly they work and very nearly all of them are
completely unaware of the concept of geographic coordinates and spit
out lousy vector data using pixel coordinates.  For small raster to
vector conversions, you may find a freeware tool known as MapScan, to
be useful.  It does understand the concept of geographic coordinates
and the price is right.  Unfortunately, it's no longer generally
available from it's original source (United Nations), though you may
find it out there somewhere.  It's nothing like a turnkey conversion
tool.  You will have to really want to do the conversion and spend lots
of time learning the ins and outs of raster to vector conversion.

J.G.

--- In OziUsers-L@yahoogroups.com, "Ryan" <ryan.racinez@...> wrote:
>
> Hi All,
>
> I import single DRG files into .map files.  Is it possible to display
> half of one map and half of another map in the view?  If so, how do I
> do it?
>
> I'm guessing that a workaround for this is to somehow combine the
> images into a single file, then import it into a single map file.
>
> Any suggestions would be appreciated.  Thanks.
>
> --Ryan

Ryan,

With the exception of one particular series of map images from New
Zealand, Ozi cannot display more than one map image at a time.  You can
of course open two instances of OziExplorer at the same time and switch
back and forth between the two.  If you want seamless display of two
images, then the only Ozi solution is as you've surmised, merge the two
images.  There is an Ozi extra available called MapMerge that will
merge as many images as you have memory/hard disk space for.  You can
download MapMerge from:

http://64.71.184.220/eng/optional_extras.html

J.G.

>From: "rwcx183" <lgalvin@...>
>--- In OziUsers-L@yahoogroups.com, "mabrub9" <mabrub9@...> wrote:
> >
> > Hello all.
> >  I have been using Ozy for 3 or 4 years now with great success with
>my
> > trusty Magellan 315. I recently got an explorist xl, now I understand
> > that Ozy will not upload maps to my new xl what I am looking for is a
> > conversion tool that would take the maps I have now and convert them
> > to the format the xl needs. The fill extension the xl looks for
> > is .imi for detailed maps and .mgi for background maps.
> >  I would like to convert some maps I have made in Ozy  using aerial
> > photos they would be great on the xl's large screen.
> >
> > Thanks
> > Mitch
>
>Mitch,
>
>Ozi maps are exclusively in what is known as raster bitmap format,
>which is a brute force orderly description of what color each pixel is,
>row by row, column by column.  Your Explorist GPS uses maps which are
>exclusively in what is known as vector format, which is a simple point
>to point description of how to draw the lines on the map.  As such,
>there isn't any easy way to convert from raster format to vector
>format.  You can trace tracks over features on a raster map and then
>export the tracks as vector shapefiles, which may be convertible to
>something usable by your explorist.  Maybe check in the map authors
>group for someone who knows the details for the explorist GPS.  There
>are semi-automated tools for doing raster to vector and I'm certain
>that at least one person here, will post some links to what end up
>being useless for this purpose, tools.  Most of them are way overpriced
>considering how poorly they work and very nearly all of them are
>completely unaware of the concept of geographic coordinates and spit
>out lousy vector data using pixel coordinates.  For small raster to
>vector conversions, you may find a freeware tool known as MapScan, to
>be useful.  It does understand the concept of geographic coordinates
>and the price is right.  Unfortunately, it's no longer generally
>available from it's original source (United Nations), though you may
>find it out there somewhere.  It's nothing like a turnkey conversion
>tool.  You will have to really want to do the conversion and spend lots
>of time learning the ins and outs of raster to vector conversion.
>
>J.G.
>
There are some Mapscan references in the p2p network eMule:

ed2k://|file|MapScan.zip|2196682|818AD57AD1052E615A7982D0A5694F48|/
ed2k://|file|manual%20mapscan.pdf|1460307|3C99F567FC85E04DAF242957A13C0381|/
ed2k://|file|Msupdate%20Parche%20Mapscan.exe|981813|2614E2A004319F00A11BB0131FF4\
79EB|/
ed2k://|file|tutorial%20mapscan.htm|19212|B21F05F4C5D03292FCFB34FBB1BDFF34|/
ed2k://|file|C%C3%B3mo%20crear%20tracks%20para%20OziExplorer%20con%20MapScan.htm\
|21616|994E32DDE8CD7C48D8DCDFD55959BC61|/


Piet

Ryan wrote:
> Hi All,
>
> I import single DRG files into .map files.  Is it possible to display
> half of one map and half of another map in the view?  If so, how do I
> do it?
>
> I'm guessing that a workaround for this is to somehow combine the
> images into a single file, then import it into a single map file.

In fact, the DRG Import creates an Ozi .map file for the DRG,
but it doesn't put the DRG "into" the .map file.

Ozi only displays one map image(i.e. referenced by one .map file)
at a time, however, you can open multiple instances of Ozi, and
you may be able to solve your 'problem' by using the Index Map
and/or the Regional Map window(both explained in the Help file).

You can use OziMapMerge to merge together multiple Ozi maps.
That will likely be easier for you than merging the map images
and then manually calibrating the resulting map image.

Also, you might explain the specifics of your situation, as
there may be other ways to use Ozi to accomplish what you
want, and/or other sources of suitable map images.

--
Dave Patton

Co-Lead Developer, Punt
http://punt.sourceforge.net/

Canadian Coordinator, Degree Confluence Project
http://www.confluence.org/

Personal website - Maps, GPS, etc.
http://members.shaw.ca/davepatton/

I have just downloaded the NatMap Raster Mosaic 2003 release set to
replace my older Auslig set of maps, but have found that the image
files (.ecw)have not downloaded only the .map files. I have tried
uninstalling and reinstalling both NatMap and OziExplorer programmes
but with no luck. Any clues? Can I download these 2003 .ecw file from
somewhere?

Has anyone had a problem viewing shapefiles in OziExplorer (v
3.95.4m)? The layer loads correctly and is in the correct place but
only a portion is displayed on the active map. However, the entire
shapefile is visible in the smaller 'Map View' window. I have
increased size of track in the Configuration setting to 90,000 - above
the actual shapefile's 70,000 points.

Is there some limiation to number of points Ozie can display? It seems
the data is there because the Map View is correct.

Any thoughts greatly appreciated ...

Bob S.

Michael Pratt wrote:

> I have just downloaded the NatMap Raster Mosaic 2003 release set to
> replace my older Auslig set of maps, but have found that the image
> files (.ecw)have not downloaded only the .map files. I have tried
> uninstalling and reinstalling both NatMap and OziExplorer programmes
> but with no luck. Any clues? Can I download these 2003 .ecw file from
> somewhere?

   If you're talking about the Natmap maps downloadable from the OziExplorer
site, then they are only the .MAP files, not the .ecw image files.

   It says so just above the downloads:

   "Please NOTE these are only the calibration files for OziExplorer (.map
files), you need to PURCHASE the map Images from Geoscience Australia, myself
or another supplier. OziExplorer does not come with any maps other than demo
ones."

--
Linux Registered User # 302622
<http://counter.li.org>
Internet: jt@...

--- In OziUsers-L@yahoogroups.com, John Tserkezis <jt@...> wrote:
>
> Michael Pratt wrote:
>
> > I have just downloaded the NatMap Raster Mosaic 2003 release set
to
> > replace my older Auslig set of maps, but have found that the
image
> > files (.ecw)have not downloaded only the .map files. I have
tried
> > uninstalling and reinstalling both NatMap and OziExplorer
programmes
> > but with no luck. Any clues? Can I download these 2003 .ecw file
from
> > somewhere?
>
>   If you're talking about the Natmap maps downloadable from the
OziExplorer
> site, then they are only the .MAP files, not the .ecw image files.
>
>   It says so just above the downloads:
>
>   "Please NOTE these are only the calibration files for
OziExplorer (.map
> files), you need to PURCHASE the map Images from Geoscience
Australia, myself
> or another supplier. OziExplorer does not come with any maps other
than demo
> ones."
>
> --
> Linux Registered User # 302622
> <http://counter.li.org>
> Internet: jt@...
>

Or you can download the .ECW files free from the Geo science site.
You then import the .ECW files into Ozi and this creates the .MAP
files

Bruce wrote:

> Or you can download the .ECW files free from the Geo science site.
> You then import the .ECW files into Ozi and this creates the .MAP
> files

   Or you could pay the 100 bucks for the DVD and save yourself 100 bucks worth
of internet connection fees and several hours.  And get the lastest revisions
of the maps.
--
Linux Registered User # 302622
<http://counter.li.org>
Internet: jt@...

I have made 2 symbols for use with Points [ a red circle and red
triangle]  - both are used in marking up Rogaine/orienteering maps.
I've filed them in the Symbols folder of Oziexplorer.

How do I now change the points symbol when manually inserting a point?

As well is it possible to replace Waypoint symbols by changing the
name of my symbol so that I can automatically have waypoints show up
as the red circle that I've created?
Cheers
Mike Coleman
Cairns

--- In OziUsers-L@yahoogroups.com, "geobobbo" <geobobbo@...> wrote:
>
> Has anyone had a problem viewing shapefiles in OziExplorer (v
> 3.95.4m)? The layer loads correctly and is in the correct place but
> only a portion is displayed on the active map. However, the entire
> shapefile is visible in the smaller 'Map View' window. I have
> increased size of track in the Configuration setting to 90,000 - above
> the actual shapefile's 70,000 points.
>
> Is there some limiation to number of points Ozie can display? It seems
> the data is there because the Map View is correct.
>
> Any thoughts greatly appreciated ...
>
> Bob S.
>
We've struck the same problem but there is a workaround.
Instead of loading the track file from File/Track Log/Load track file
try opening it from the Track Toolbar in View/Toolbars/Track Toolbar

It works for us

Simon A

--- In OziUsers-L@yahoogroups.com, John Tserkezis <jt@...> wrote:
>
> Bruce wrote:
>
> > Or you can download the .ECW files free from the Geo science site.
> > You then import the .ECW files into Ozi and this creates the .MAP
> > files
>
>   Or you could pay the 100 bucks for the DVD and save yourself 100
bucks worth
> of internet connection fees and several hours.  And get the lastest
revisions
> of the maps.
> --
> Linux Registered User # 302622
> <http://counter.li.org>
> Internet: jt@...
>

Would myself suggest getting the mozaic - beets messing around with
individual map sheets..and if you really need the maps..paying
required amount is good value.

Cheers
Greg

--- In OziUsers-L@yahoogroups.com, "Piet Vogelaar" <pietvogelaar@...>
> There are some Mapscan references in the p2p network eMule:
>
> ed2k://|file|MapScan.zip|2196682|818AD57AD1052E615A7982D0A5694F48|/
> ed2k://|file|manual%
20mapscan.pdf|1460307|3C99F567FC85E04DAF242957A13C0381|/
> ed2k://|file|Msupdate%20Parche%
20Mapscan.exe|981813|2614E2A004319F00A11BB0131FF479EB|/
> ed2k://|file|tutorial%
20mapscan.htm|19212|B21F05F4C5D03292FCFB34FBB1BDFF34|/
> ed2k://|file|C%C3%B3mo%20crear%20tracks%20para%20OziExplorer%20con%
20MapScan.htm|21616|994E32DDE8CD7C48D8DCDFD55959BC61|/
>
>
> Piet

I should've remembered that I have MapScan already available at:

http://home.pacbell.net/lgalvin/MapScan.zip

The program and the manual are in the zip file.

J.G.

Does anybody know about a procedure, program, add-on, or whatever for
searching tracks in Ozi?

Let supose I have a loaded map, and I want to know which tracks do
have points in common with the map.

If one has many tracks it is sometimes very difficult to find the ones
that pass trough a given map or map area.

Thanks a lot for your help,
Pedro

Since you have to name the tracks to save them, surely you can give them the
same, or a similar, name as the map? This seems elementary to me. All my tracks
and routes are given the same name as the map they were originated from. If a
map has several tracks appended, I number each one as a sequel to the name.

Dennis.
   ----- Original Message -----
   From: pedro_gps
   To: OziUsers-L@yahoogroups.com
   Sent: Monday, July 03, 2006 3:32 AM
   Subject: [OziUsers-L] Track search


   Does anybody know about a procedure, program, add-on, or whatever for
   searching tracks in Ozi?

   Let supose I have a loaded map, and I want to know which tracks do
   have points in common with the map.

   If one has many tracks it is sometimes very difficult to find the ones
   that pass trough a given map or map area.

   Thanks a lot for your help,
   Pedro






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   Checked by AVG Free Edition.
   Version: 7.1.394 / Virus Database: 268.9.8/380 - Release Date: 30/06/2006



[Non-text portions of this message have been removed]

On 03 July 2006 in OziUsers-L@yahoogroups.com
pedro_gps wrote:

> >  Does anybody know about a procedure, program, add-on, or
> > whatever for searching tracks in Ozi?

> > Let supose I have a loaded map, and I want to know which tracks do
> > have points in common with the map.

On 03 July 2006 09:50 in OziUsers-L@yahoogroups.com
Dennis Pogson wrote:

> Since you have to name the tracks to save them, surely you
> can give them the same, or a similar, name as the map? This
> seems elementary to me. All my tracks and routes are given
> the same name as the map they were originated from. If a map
> has several tracks appended, I number each one as a sequel to
> the name.

That is only practical if you only have one map covering the area.

I normally have several; different scale and/or different type
(satellite image, aerial photo, topographic etc.)
I also prefer to name my tracks more specific to the activity -
including the map name as well will create very long filenames.

I agree that a utility (or Ozi function) to search for tracks covered by
the loaded map would be useful. Some times the reverse is also required;
i.e. load map for track.

Pedro, Perhaps you should send a feature request to Des.

Regards
Hans

The same (named) track will load to any number of maps/charts covering the same
area. Naturally, as a sailor, I am influenced by the fact that there are rarely
2 ways to navigate in confined waters, and once a "best" track is saved, all
others should be deleted. Perhaps it is different on land, but I do find the
delete key to be the most useful key on my keypad!

Dennis.
   ----- Original Message -----
   From: Scheffler, Hans <hscheff@...>
   To: OziUsers-L@yahoogroups.com
   Sent: Monday, July 03, 2006 9:08 AM
   Subject: RE: [OziUsers-L] Track search


   On 03 July 2006 in OziUsers-L@yahoogroups.com
   pedro_gps wrote:

   > > Does anybody know about a procedure, program, add-on, or
   > > whatever for searching tracks in Ozi?

   > > Let supose I have a loaded map, and I want to know which tracks do
   > > have points in common with the map.

   On 03 July 2006 09:50 in OziUsers-L@yahoogroups.com
   Dennis Pogson wrote:

   > Since you have to name the tracks to save them, surely you
   > can give them the same, or a similar, name as the map? This
   > seems elementary to me. All my tracks and routes are given
   > the same name as the map they were originated from. If a map
   > has several tracks appended, I number each one as a sequel to
   > the name.

   That is only practical if you only have one map covering the area.

   I normally have several; different scale and/or different type
   (satellite image, aerial photo, topographic etc.)
   I also prefer to name my tracks more specific to the activity -
   including the map name as well will create very long filenames.

   I agree that a utility (or Ozi function) to search for tracks covered by
   the loaded map would be useful. Some times the reverse is also required;
   i.e. load map for track.

   Pedro, Perhaps you should send a feature request to Des.

   Regards
   Hans





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   Checked by AVG Free Edition.
   Version: 7.1.394 / Virus Database: 268.9.8/380 - Release Date: 30/06/2006



[Non-text portions of this message have been removed]

--- In OziUsers-L@yahoogroups.com, "pedro_gps" <pedro@...> wrote:

> Does anybody know about a procedure, program, add-on, or whatever
> for searching tracks in Ozi?
>
> Let supose I have a loaded map, and I want to know which tracks do
> have points in common with the map.
>
> If one has many tracks it is sometimes very difficult to find the
> ones that pass trough a given map or map area.


What is "many tracks"?

You probably already know this, but you can load up to 75 tracks
at once. (easy when they are in the same directory)
Then you can swiftly scroll through the list in Track Control and
see white dots appear on the selected track.
That's how I always identified tracks that pass through a certain
area.

In the development version 3.96.2a however, there is a annoying
delay of 1 second each time before the map is redrawn.
(I've already mentioned this 'problem' to Des, together with
reporting some bugs)

On 03 July 2006  9:08 in OziUsers-L@yahoogroups.com
Scheffler, Hans wrote:

>   That is only practical if you only have one map covering the area.

On 03 July 2006 10:44 in OziUsers-L@yahoogroups.com
Dennis Pogson wrote:

> The same (named) track will load to any number of maps/charts
> covering the same area.

Of course it will, but that is not the point here.

The original question was:
" Let supose I have a loaded map, and I want to know which tracks do
have points in common with the map."

Dennis Pogson's suggested solution is to include the map name in the
track name.
For this to work with multiple maps, you need to include all the map
names that you want to associate with the track in the track name.
This can create very long track names, which is not a very elegant
solution IMHO.

Hans

----- Original Message -----
From: "pedro_gps" <pedro@...>
To: <OziUsers-L@yahoogroups.com>
Sent: Monday, July 03, 2006 4:32 AM
Subject: [OziUsers-L] Track search


: Does anybody know about a procedure, program, add-on, or whatever for
: searching tracks in Ozi?
:
: Let supose I have a loaded map, and I want to know which tracks do
: have points in common with the map.
:
: If one has many tracks it is sometimes very difficult to find the ones
: that pass trough a given map or map area.
:
: Thanks a lot for your help,
: Pedro

Well, not a procedure, program or add-on but maybe a whatever.

If you create a project for a certain map you can add the necessary tracks
as you wish. But then...you first have to find them...;-)

Regards, Pocileh

You can save the track as many times as you wish with the name of the currently
loaded map, so long track names are not necessary. All this does is give you
separate copies of the same track under a name which corresponds to the loaded
map.

Maybe sea charts are different to land maps, but I cannot for the life of me see
what the problem is, unless you wanted to get to the same destination by a whole
series of different tracks, which at sea would be pointless. Tracks on land tend
to follow roads. Maybe that is the problem.

For example the Sound of Harris, in the Outer Hebrides is a tortuous sound with
many hidden rocks and strong tides. there are 3 known tracks through the Sound.
All 3 of these are saved under 1 track file "sofharris.plt". I have about 5
charts which show the Sound of Harris under different mapfile names, and
different scales, but having loaded the above trackfile, I can change to any one
of the above mapfiles and the same track is overlaid on the current chart.

If you don't save trackfiles under approprite names, what DO you save them
under?

Dennis.
   ----- Original Message -----
   From: Scheffler, Hans <hscheff@...>
   To: OziUsers-L@yahoogroups.com
   Sent: Monday, July 03, 2006 10:13 AM
   Subject: RE: [OziUsers-L] Track search


   On 03 July 2006 9:08 in OziUsers-L@yahoogroups.com
   Scheffler, Hans wrote:

   > That is only practical if you only have one map covering the area.

   On 03 July 2006 10:44 in OziUsers-L@yahoogroups.com
   Dennis Pogson wrote:

   > The same (named) track will load to any number of maps/charts
   > covering the same area.

   Of course it will, but that is not the point here.

   The original question was:
   " Let supose I have a loaded map, and I want to know which tracks do
   have points in common with the map."

   Dennis Pogson's suggested solution is to include the map name in the
   track name.
   For this to work with multiple maps, you need to include all the map
   names that you want to associate with the track in the track name.
   This can create very long track names, which is not a very elegant
   solution IMHO.

   Hans





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   No virus found in this incoming message.
   Checked by AVG Free Edition.
   Version: 7.1.394 / Virus Database: 268.9.8/380 - Release Date: 30/06/2006



[Non-text portions of this message have been removed]

It is widely known that you can add photographs to display in the Map
Features dialog box in Ozi.

Perhaps not so widely known  is the fact that the same function will
open text files, an extremely useful facility when a lengthy warning
or other notice is required at a specific location.

Simply type the path to the text file into the file attachment window
in the map features dialog box and a click on the blank photograph
panel will open Notepad and display the text file.

I find this extremely useful for inserting Notices to Mariners and
suchlike, which are too long-winded to insert using the Map Comments
button.

I usually save the text files either in the same folder as my pictures
or in the \data folder under Ozi's main folder.

Dennis.

It actually appears you can add any file type recognised by windows.

Video, PDF's, htmls both local & internet, DOCs, excel, zip etc.

Anything that if you could normally double-click & windows would run will
work!

Thanks Dennis, I wasn't aware of this functionality!

Cheers
Richard
Junee

----- Original Message -----
From: "dennispogson" <dennis_pogson@...>
To: <OziUsers-L@yahoogroups.com>
Sent: Monday, July 03, 2006 10:48 PM
Subject: [OziUsers-L] Map features button


> It is widely known that you can add photographs to display in the Map
> Features dialog box in Ozi.
>
> Perhaps not so widely known  is the fact that the same function will
> open text files, an extremely useful facility when a lengthy warning
> or other notice is required at a specific location.
>
> Simply type the path to the text file into the file attachment window
> in the map features dialog box and a click on the blank photograph
> panel will open Notepad and display the text file.
>
> I find this extremely useful for inserting Notices to Mariners and
> suchlike, which are too long-winded to insert using the Map Comments
> button.
>
> I usually save the text files either in the same folder as my pictures
> or in the \data folder under Ozi's main folder.
>
> Dennis.

P.S. even *.map files if associated to ozi. However it does open them in a
new instance of ozi!

Cheers
Richard

P.P.S. You can also add any file as an attachment to waypoints which of
course aren't fixed to the current map. That may be more useful in some
situations.

Cheers
Richard

----- Original Message -----
From: "Richard & Steph" <merlinsgarden@...>
To: <OziUsers-L@yahoogroups.com>
Sent: Monday, July 03, 2006 11:24 PM
Subject: Re: [OziUsers-L] Map features button


> P.S. even *.map files if associated to ozi. However it does open them in a
> new instance of ozi!
>
> Cheers
> Richard
>
>
>
> Attachments are not allowed for emails sent to this group.
> When you see spam messages on this group, do not respond.
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>

Does this mean I can type the path to a movie of the area and open up Media
Player to view the film?
Humpback whales, skinny-dippers, man overboard? Eh! the mind boggles!

Wonder if Des knows about this?

Dennis.


----- Original Message -----
   From: Richard & Steph
   To: OziUsers-L@yahoogroups.com
   Sent: Monday, July 03, 2006 2:20 PM
   Subject: Re: [OziUsers-L] Map features button


   It actually appears you can add any file type recognised by windows.

   Video, PDF's, htmls both local & internet, DOCs, excel, zip etc.

   Anything that if you could normally double-click & windows would run will
   work!

   Thanks Dennis, I wasn't aware of this functionality!

   Cheers
   Richard
   Junee

   ----- Original Message -----
   From: "dennispogson" <dennis_pogson@...>
   To: <OziUsers-L@yahoogroups.com>
   Sent: Monday, July 03, 2006 10:48 PM
   Subject: [OziUsers-L] Map features button

   > It is widely known that you can add photographs to display in the Map
   > Features dialog box in Ozi.
   >
   > Perhaps not so widely known is the fact that the same function will
   > open text files, an extremely useful facility when a lengthy warning
   > or other notice is required at a specific location.
   >
   > Simply type the path to the text file into the file attachment window
   > in the map features dialog box and a click on the blank photograph
   > panel will open Notepad and display the text file.
   >
   > I find this extremely useful for inserting Notices to Mariners and
   > suchlike, which are too long-winded to insert using the Map Comments
   > button.
   >
   > I usually save the text files either in the same folder as my pictures
   > or in the \data folder under Ozi's main folder.
   >
   > Dennis.






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[Non-text portions of this message have been removed]

Dennis Pogson wrote:
> You can save the track as many times as you wish with the name of the
> currently loaded map, so long track names are not necessary. All this
> does is give you separate copies of the same track under a name which
> corresponds to the loaded map.
>
> Maybe sea charts are different to land maps, but I cannot for the
> life of me see what the problem is, unless you wanted to get to the
> same destination by a whole series of different tracks, which at sea
> would be pointless. Tracks on land tend to follow roads. Maybe that
> is the problem.

> If you don't save trackfiles under approprite names, what DO you save
> them under?

Although I'm not a sailor, I can see where the problem could
happen with sea charts, but here's an example using land.

The Canadian National Topographic System has maps at scales
1:50,000 and 1:250,000. In addition to these topographic maps,
I have a variety of other types of maps.

The NTS 1:50,000 mapsheet that covers the place I live is
092G06 North Vancouver, which covers 15 minutes of latitude
and 30 minutes of longitude(1010 sq. km. or 390 sq. mi.).

If I right-click on 092G06 where I live, and do a
"Find Map at Cursor", the resulting list contains
37 maps, ranging in 'pixel size' from 1.53 to 66670.

So, to start with, saving the same track multiple times
with different names, to reflect something about the
map name(s), seems impractical.


What I do with my tracks is organize them by 'activity
or type'. I have an 'Ozi data folder', and under that I
save all my tracks, waypoints, etc.

Under that folder I have subfolders such as "FSR"(Forest
Service Roads, which are gravel logging roads), "Hikes",
"Mushrooms", "Vancouver Area", "Whistler Area", etc.

One advantage of this approach is that Ozi 'remembers'
what folder you last used when doing a 'Load Track' or
'Load Waypoints' etc., so if you load a waypoint file
for a Hike, when you go to load the track(s) for that
Hike, Ozi puts you in the correct(same) folder.

Also, by having the 'Ozi data folder' be the 'root'
folder for all Ozi data files, even if you are a number
of levels deep in that folder structure, navigating up
to the root folder and back down another part of the
folder structure can be done quickly in the "Load..."
dialog window.

Of course, there might be some overlap with this folder scheme,
and although I don't bother, one could save the same track
with different names, or with the same name but in different
folders.


For example, I once went on the High Falls Creek hike. The
entire tracklog that I have for that hike falls within the
092G14 Cheakamus River NTS mapsheet.

I happen to recall that I also have track files in the "FSR"
folder that, at least in part, apply to the area of the hike,
because you access that hike from the Squamish FSR.

But, that map also contains part of Highway 99 from Vancouver
to Whistler, and I have multiple tracks recorded for various
parts of Highway 99, such as driving to Whistler to visit a
friend, or go skiing, or go hiking.

Also contained within mapsheet 092G14 are other areas that I
have hiked, or driven to/through, or picked mushrooms, etc.

With my 'data organization scheme' I could find all the relevant
tracks for the 092G14 map fairly easily, because each track file
usually is named with both a date and 'some other info'(e.g. the
name of the road or hike) and if I know what geographic area is
covered by the loaded map I know what types of activities I have
done in that area, and therefore know what data folder to look in.

Having said that, I can see where having the ability to have a
"Find Waypoints for Map" or "Find Tracks for Map" function that
works similarly to the existing "Find Map at Cursor" function
could be useful.


However, as a programmer, I have to say that it isn't as easy
to implement as "Find Map at Cursor". With maps, there are,
within the .map file, "corner markers"(or implicitly defined
corner markers) that define the geographic area that the map
covers. Ozi can use these when it 'indexes' .map files to build
the list of available maps. Also, Ozi builds 'index files'
to speed up the map search.

For data such as Waypoints or Tracks, Ozi would have to read
the entire contents of each file to determine the bounding
box for the geographic area covered. This implies that the
"initial search" could be slow.

Once that had been done, and the bounding box data saved in
'index files', it would be possible to have "Find Tracks for
Map" be a similar speed to "Find Map at Cursor", however, I
see two issues:

A)
Data such as Waypoints and Tracks is, in general, more 'volatile'
than maps, both with regards to new data being added more often
than new maps are added, and with regards to changes to the data
itself(e.g. adding comments to Waypoints). As such, there is more
likelihood of Ozi needing to 're-index' data files, which might
make the "Find xxx for Map" functionality "too slow".

B)
In general, maps are rectangular, and therefore for most maps
their area of coverage can easily be defined by a bounding box.
The same is not true for Waypoints and Tracks. For example, if
you imagine a 3-trackpoint track from A to C, via B:
A...1
.x...
..B..
...x.
2...C
then the bounding box for that track would contain points
1 and 2. If point 1 happened to be on your current map when
you do "Find Tracks for Map", then this track would show up
in the list of tracks, however, it's possible that none of
it's trackpoints(from A to C) are actually on the map.
To make sure that doesn't happen, Ozi would need to do an
intersection test of the current map's extents against the
actual trackpoints, not just a bounding box for the track,
and that may make the process unacceptably slow.


P.S.
Ozi is a recreational 'mapping program'. The general question
of "what data falls within this given geographic area" is a
common question that is (usually) easily solved when using
your data withing a GIS(Geographic Information System). Ozi
isn't a GIS, but you could get some free GIS software, load
your "data" into it, and use it as a tool to help you identify
which tracks/waypoints/etc. have data for a particular map.

--
Dave Patton

Co-Lead Developer, Punt
http://punt.sourceforge.net/

Canadian Coordinator, Degree Confluence Project
http://www.confluence.org/

Personal website - Maps, GPS, etc.
http://members.shaw.ca/davepatton/

On 03 July 2006 13:40 in OziUsers-L@yahoogroups.com
Dennis Pogson wrote:

> You can save the track as many times as you wish with the
> name of the currently loaded map, so long track names are not
> necessary. All this does is give you separate copies of the
> same track under a name which corresponds to the loaded map.

OK, if you don't mind having duplicates.
Track files are normally not that large, so can be done.

> Maybe sea charts are different to land maps, but I cannot for
> the life of me see what the problem is, unless you wanted to
> get to the same destination by a whole series of different
> tracks, which at sea would be pointless. Tracks on land tend
> to follow roads. Maybe that is the problem.

Land and sea applications do differ.

> For example the Sound of Harris, in the Outer Hebrides is a
> tortuous sound with many hidden rocks and strong tides. there
> are 3 known tracks through the Sound. All 3 of these are
> saved under 1 track file "sofharris.plt". I have about 5
> charts which show the Sound of Harris under different mapfile
> names, and different scales, but having loaded the above
> trackfile, I can change to any one of the above mapfiles and
> the same track is overlaid on the current chart.

Is the map also named sofharrris ?

Of course it is easy to load other maps once you have one map loaded.
However that does not answer the original question:
" Let suppose I have a loaded map, and I want to know which tracks do
have points in common with the map."

I did not ask the original question, but here is some background on my
use of Ozi.

My primary application for Ozi is mountaineering.
For obvious reasons I do not use Ozi in the field on a laptop.
I don't carry a PDA either, so no OziCE.

Ozi is a planning and record keeping tool for me.

Most mountains can be climbed by different routes.

Most topographic maps cover a sufficiently large area containing more
than one mountain.

My track names normally contain the name of the mountain or area, name
of the route and date.

Say I have a map loaded of a mountainous area and I want to graphically
show what I have done in the area, it will be nice to be able to search
for and load the appropriate tracks.
Perhaps Ozi is not the right tool as this is bordering on GIS.

Saving all tracks for a specific mountain in one track file might have
some use.

Thanks for the suggestion of including the map name in the track, but
that is of more use when you need to go the other way i.e. find the
right map for the track rather than finding all the tracks for a map.

Regards
Hans