Help me to divide my map into pieces with Map Tiler, please!

[Piko71]

I am trying to load a bit of map to my GPS Garmin Oregon 400t.
Actually I did it but the file of map is to big and GPS is working
poor. I got a tips to divide my map into pices with MapTiler which I
did. But the result is that dimensions and orientation of the map is
destroyed.


I did so:
1. Scanned a map to the jpg file.
2. Get it into GE as an overlay
3. Put it into right position – it looks like that:
http://hem.bredband.net/dorkol/Bilder/BeforeMapTiler.jpg

4. Saved Place as kml file.
5. Started MT and chose
-Selection of the tile profile -set to Google Earth (KML superoverlay)
-Source data files - read in jpg file and -opened kml file and copied
LongLatBox in order: north south east west. (“59.1752941264384
59.15541364606811 18.13427613625129 18.10749611686865”)
-Spatial Reference System -set to WGS84
-Choose file format –set to Garmin custom maps kmz – 1024 pixels
- directory, name, title and render
- then I get kmz file
6. Start GE and opened kmz file –it shows a lot of shadowed fragment
and then it looks like that:
http://hem.bredband.net/dorkol/Bilder/AfterMapTiler.jpg

Wrong dimensions, wrong size, and wrong tilt!
Please help, what’s done wrong?

[Klokan Petr Pridal]

Hi,

you did all the steps correctly and MapTiler generated the map exactly
at the position you have provided - without rotation, because you did
not specify it.

I guess you are not used to work with GIS tools so the easiest for you
would be to use a tool like: http://labs.metacarta.com/rectifier/ or
http://warper.geothings.net/.
Upload your image there, mark three or more control points on the map,
warp it and download the GeoTIFF. Then you can use MapTiler on it and
there will be no troubles with position.

The alternative to those tools is mine http://georeferencer.org/,
which will produce the World file (.wld) file for you. Here the steps
are:
1) Upload the .jpeg image to your own webserver or any free hosting on
the web
2) Type url of your image into http://georeferencer.org/
3) Center "the cross" on your picture and on the reference map by
panning (you can choose also one of the satellite images with "+" link
on the right) and press "Add point" - this at least on three different
points on the map, more points you give more precise the result will
be
4) Press "Save & Exit" and on the next page just press "Download World
File".
5) The .wld file should have the same name like your jpeg and it
should be saved in the same directory as the jpeg file. When you open
the .jpg in MapTiler it will have already the correct georeference
including the rotation. The result will look great then.

The georeferencer.org is now in Alpha version, we are going to rewrite
it during the next year. I plan to integrate this functionality into
the future version of MapTiler under the "Georeference" button, so it
is going to be totally user friendly - but this later on.

In case you find MapTiler useful for your maps and Garmin GPS please
consider donation via the page: http://www.maptiler.org/garmin.html.
With a bit of support the development will go faster.

Best regards,

Petr Pridal

[Piko71]

Thank You for your help!

I did as you wrote:

> The alternative to those tools is minehttp://georeferencer.org/,

But when I wanted to load my jpg file I get the error message:
"Georeference of the raster contains rotation or skew. Such raster is
not supported"!

I don't understand it.
I will try the other software you recommended tomorrow.

Piotr