Voir la source de QtVlm Draw grib estimated road

[[QtVlm / en # Tutorials | Back]]


By right-clicking on the map, on a boat or on a POI, you can get a contextual menu. One of the choices in this menu is "Draw a Grib esteem":

[[Image: twa1.png]]

Two calculations can be selected and fashion mixed:
* An estimate with a constant wind angle (TWA)
* And with a constant heading estimation (loxodromic)

The start date can be Either:
* The current grib's date
* The date of the next shift.

On the screen shot method is set to TWA, and did start date is next vacation.

You can define up to 5 sections (Here the first TWA is set to 87 = 61 ° falling on vacations). The drwn esteem is on the map and you can choose to keep or not the POIs. In this case esteem is red Because a collision with coasts has-been detected.

This is really useful for testing different options and find the best one.




[[QtVlm / en # Tutorials | Back]]


[[Category: qtVlm]]