Garmin Mapsource TOPO problem

When I highlight topo squares to download to my Etrex legend, the squares I
want to download are highlighted with a pink overtint. The US National
Forests,National Parks and state parks already have a light green overtint.

The combination of the two overtints makes the map very dark and hard to
read.

If this only occurred on My PC while using the CD this wouldn't be too bad.

Unfortunately both overtints are downloaded along wth the topo squares to my
Etrex Legend.
On the B&W LCD screen the POI text labels (which are blue on the PC screen)
and the contour lines (which are brown on the PC screen) the are very hard
to read.

Is there any way I can turn off one or both of these overtints when I
download a topo square to my Etrex Legend?

Dan Yemiola

Dan, the below is how I avoid the problem on my GPS-V. Maybe your Legend has
similar settings you can find and change.

I have the same problem with my GPS-V; I often use it in national or state
forests such that the breadcrumb trail, a rather thin gray line, is
displayed on a gray background, the gray background being the "special
indicator" of the national or state forest. Turns out you can turn off the
gray background in the -V. You go to Map Setup, then look for Parks. There
are two fields you can mess with, one is Text Size, the other is Max Zoom.
By turning Max Zoom to OFF, the gray background goes away, making it much
easier to see the breadcrumb trail since it's now displayed against a
"normal" non-shaded background.


--
ADW

"dan Yemiola" <dan@yemiola.net> wrote in message
news:d7d6a0$colc$1@news3.infoave.net...
> When I highlight topo squares to download to my Etrex legend, the squares
> I
> want to download are highlighted with a pink overtint. The US National
> Forests,National Parks and state parks already have a light green
> overtint.
>
> The combination of the two overtints makes the map very dark and hard to
> read.
>
> If this only occurred on My PC while using the CD this wouldn't be too
> bad.
>
> Unfortunately both overtints are downloaded along wth the topo squares to
> my
> Etrex Legend.
> On the B&W LCD screen the POI text labels (which are blue on the PC
> screen)
> and the contour lines (which are brown on the PC screen) the are very hard
> to read.
>
> Is there any way I can turn off one or both of these overtints when I
> download a topo square to my Etrex Legend?
>
> Dan Yemiola
>
>

dan Yemiola wrote...
> When I highlight topo squares to download to my Etrex legend, the squares
> I
> want to download are highlighted with a pink overtint. The US National
> Forests,National Parks and state parks already have a light green
> overtint.
>
> The combination of the two overtints makes the map very dark and hard to
> read.
>
> If this only occurred on My PC while using the CD this wouldn't be too
> bad.
>
> Unfortunately both overtints are downloaded along wth the topo squares to
> my
> Etrex Legend.
> On the B&W LCD screen the POI text labels (which are blue on the PC
> screen)
> and the contour lines (which are brown on the PC screen) the are very hard
> to read.
>
> Is there any way I can turn off one or both of these overtints when I
> download a topo square to my Etrex Legend?
>
> Dan Yemiola

The pink shading is a red (pink?) herring and is not uploaded to your GPS.
The problem is the green shading of Park areas (of various kinds) that is
interpreted as dark grey by your receiver. Unfortunately there is no way of
turning this shading off in an etrex receiver, unlike other Garmin models.

The only way I know that you can get rid of this irritating problem (other
than sending death-threats to Garmin support by way of encouragement to
produce a firmware fix!) is to edit the .IMG files containing the affected
areas, using a hex editor. The easiest way to do this is to break the
polygon definitions in the TRE section of the .IMG file by re-setting the
polygon type bytes to zero for all types that will lead to Park areas being
shaded. Whilst this fixes the problem in the receiver it also removes the
green shading in MapSource.

If you are reasonably happy doing this sort of thing then the information
that you need about the .IMG file-structure is in a document available at
Audio Visual Forums and a good free hex editor is
FRHED (Audio Visual Forums.

You can use FRHED to easily decode Garmin .IMG files that have been coded
XOR 150. Load the file into FRHED and select the entire contents (ctrl+A).
Select Edit - Fill selection with... (or ctrl+shift+F). Enter 96 into the
"hex version" box and select the XOR Assignment operator (^=). Click OK and
the file will be decoded.

If you want to have a go at this but can't sort it ut yourself then let me
know and I'll put together some instructions - I can't recall all the
details off the top of my head.

David