M2 way points

[Danfe]

Hi Mavic Pilots,
Is there any way to know the distance between two way points?

 

[747P4]

Hi Mavic Pilots,
Is there any way to know the distance between two way points?

I haven't looked at the DJI Go app for the new "waypoints".
I know Litchi does provide you with a distance between waypoints.

Here is the HARD method, if you know you LAT/LONG (assuming earth is a sphere)>

Length of a radian of latitude = R
Length of a radian of longitude = R * cos (lat)

where R = radius of earth model, lat = latitude is in radians.

The equations on an ellipsoid are:
Length of a radian of latitude = a*(1.0 - e*e) / (1.0 - e*e*sin(lat)*sin(lat))**(3/2)

a = semimajor axis (use the unit that you want the answer in)
b = semiminor axis
e = sqrt(2*f - f*f) = (a*a - b*b)/(a*a)
f = flattening
** = raised to the power of

Length of a radian of longitude = a*cos(lat) / (1.0 - e*e*sin(lat)*sin(lat))**(1/2)


Roughly speaking:
Tan Track* = departure / change in lat; Distance = dep x cosec track;
Departure = Distance x sin track and Change in lat = Distance x cos track
*Tan track will always be less than 90 deg. So you have to check the relative positions of origin and destination

Here is the EASY way, if you know your LAT/LONG

Computing Distances between Latitudes/Longitudes in One Step

 

[Danfe]

I haven't looked at the DJI Go app for the new "waypoints".
I know Litchi does provide you with a distance between waypoints.

Here is the HARD method, if you know you LAT/LONG (assuming earth is a sphere)>

Length of a radian of latitude = R
Length of a radian of longitude = R * cos (lat)

where R = radius of earth model, lat = latitude is in radians.

The equations on an ellipsoid are:
Length of a radian of latitude = a*(1.0 - e*e) / (1.0 - e*e*sin(lat)*sin(lat))**(3/2)

a = semimajor axis (use the unit that you want the answer in)
b = semiminor axis
e = sqrt(2*f - f*f) = (a*a - b*b)/(a*a)
f = flattening
** = raised to the power of

Length of a radian of longitude = a*cos(lat) / (1.0 - e*e*sin(lat)*sin(lat))**(1/2)


Roughly speaking:
Tan Track* = departure / change in lat; Distance = dep x cosec track;
Departure = Distance x sin track and Change in lat = Distance x cos track
*Tan track will always be less than 90 deg. So you have to check the relative positions of origin and destination

Here is the EASY way, if you know your LAT/LONG

Computing Distances between Latitudes/Longitudes in One Step

Thanks for your time mate. The process is way too hard for me.

 

[747P4]

Thanks for your time mate. The process is way too hard for me.

No problem
If you look at a map you can see the LAT/LONG of waypoints. Just note them down and click the link at the bottom and you will have the distance automatically calculated.
The last method "roughtly speaking" is quite easy using your phone calculator in scientific mode.