Calibration

Hi Didier,

you may check the map calibration with
- compare the values qv displays with the values of the grid on the map, when you move the mouse along the grid lines in the map window or
- check known points on the map and compare the coordinates

Possible reasons for the error messages (as suggested by Hans)
- wrong coordinates
- east/west interchanged

Zitat von lafontaine

Après avoir rempli les données et repéré les points,

Hi Didier,

could you please post a screenshot of what you filled in there?

Hello Didier,
if QV6 doesn`t start anymore, try to delete the qv6.ini located in the Quo Vadis Data folder.
Normaly this should be a path like C:\Users\Public\Documents\QV6_Data.

Than try to restart QV6.

If this doesnt run for you, try the "easy repair" as described here:
http://wiki.quovadis-gps.com/d…_problems:quovadis6_norun
Scrol a little bit down.

Greetings
Denis

Bonjour Didier,

et si tu faisais le calibrage avec juste 2 x 2 points? Avec un rectangle tellement grand (3 degrées en longitude) tu ne seras pas à un mètre près et tu pourras aisément te passer des cinq points additionnels.

C'est juste une idée pour éventuellement éviter le 'overflow' arithmétique.

Une autre idée: faire le calibrage avec TTQV4. Je le trouve toujours plus maniable que celui de son successeur, et il a l'avantage de produire un fichier lisible.

Amitiés
Ludger

Bonjour Didier,

sounds pretty strange to me. Your sample map covers an area in central Sweden, so I would prefer to calibrate it in the Swedish system. The Swedish Lantmäteriet use a transverse mercator projection with different reference systems, depending on the date of the map, usually this is all printed in the legend of the map. If you want me to have a look at it, please upload this map to some accessible webspace and send the download link to talisker at is dot gaertner dot de.

Cordialement

Bonjour Didier!

Thank you for the sample, but I will stick to the map you used in this thread.

The map's legend indicates the projection and the map datum:

[Blockierte Grafik: http://up.picr.de/13265059io.jpg]

For Europe the European Datum 1950 (alias European 1950 or ED50) refers to the International Spheroid, you can select it as well.

If i calibrate the map the way you did I get the "OverflowException" error message too. But the map appears to be calibrated well, if I right-click it again in the Xplorer and select "Calibrate", have a look at the calibration and then save it again without any change, everything is smooth with no error. So you are done that way, but nevertheless Tom should have a look at this issue.

[Blockierte Grafik: http://up.picr.de/13264969oq.jpg]

[Blockierte Grafik: http://up.picr.de/13264915dr.jpg]

[Blockierte Grafik: http://up.picr.de/13264888ev.jpg]

For this AMS map series I would prefer another way of calibration. The corner coordinates, the projection and the datum are indicated on the map, so please try this:

[Blockierte Grafik: http://up.picr.de/13265012mp.jpg]

[Blockierte Grafik: http://up.picr.de/13264917fb.jpg]

Cordialement

Zitat von lafontaine

Je souhaiterai savoir pourquoi les cases Lon_0, X_0 et Y_0 ne sont pas renseignées dans votre exemple?

Bonjour Didier!

UTM Zone 33 is unique and implies the definition of the parameters, therefore it is sufficient.

UTM -> scaling k_0 = 0,9996
Zone 33 -> longitude of origin lon_0 = 15° E, false easting x_0 = 500000, false northing y_0 = 0

This applies to the northern hemisphere, if you tick the "South" box, the parameters will be adjusted automatically to the southern hemisphere.