Discussions

Elevation Graph for more than 70KM

Posted by John on June 30, 2014 at 5:10am

HI,

We are doing a test flight for more than 30mi, (15mi both ways). But we wanted to check the Elevation graph in the mission planner but we were getting the message that the distance is too big or too low waypoints.

We have added multiple waypoints to eliminate this cause, but we are still getting the message. We tried few waypoints, but the message was the same.

We would like to know how can we fix it to get the elevation graph if more than 30mi ?

toomanfewWP.jpg

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Replies

- - - - Marek > John July 2, 2014 at 2:41am
        
        OK.
        
        I will try do do it today evening and will let you know about results.
        
        My mail: marekm (at) hhot (dot) pl
        
        M.
        
        John > Marek July 2, 2014 at 2:48am
        
        HI Marek,
        
        Hi Marek,
        
        Thanks for your help and time, can you add like 2 zeros to make it from 50,000 to 5,000,000 once for all.
        
        are you in Poland?
        
        your email is hot (dot) pl or hhot (dot) pl ?? double h?
        
        mine is: wakedelie (at) gmail (dot) com
        
        Do you have skype, mine is donelie
        
        Marek > John July 2, 2014 at 3:10am
        
        mail with single "h"
        
        John > Marek July 2, 2014 at 3:11am
        
        I see you are in Poland, is it correct?
        
        Developer
        
        Bill Bonney > John July 2, 2014 at 3:47am
        
        APM planner 2.0 has elevation graph, and it does not check the total distance. The request to google for elevation data will work if the google api will allow it.
        
        Download the latest from here http://firmware.diydrones.com/Tools/APMPlanner/daily/
  - Moderator
    
    Gary Mortimer > John July 2, 2014 at 1:52am
    
    Elie, is this distance for the UK?? If so it will not be permitted.
    - John > Gary Mortimer July 2, 2014 at 2:02am
      
      HI Gary,
      
      This project is in Africa, they are afraid now to send cars with people to do the pipeline surveillance, they wants us to offer them a small UAV which can do the job. Our only issue is the elevation graph for the moment.
iskess June 30, 2014 at 5:06pm

This is a limitation for Google. I figured out the limit in the past, but can't remember it.
Michael if you're reading this, would it be possible to trick GE by breaking the request into smaller blocks?
- John > iskess June 30, 2014 at 11:04pm
  
  HI,
  
  We found the limitation in the source code, we need to do it much more, how can we?
  
  Mission Planner source code file ElevationProfile.cs line 186
  
  if (list.Count < 2 || coords.Length > (2048 - 256) || distance > 50000)
  
  {
  
  CustomMessageBox.Show("Too many/few WP's or to Big a Distance " + (distance / 1000) + "km", "Error");
  
  return answer;
  
  }
  - Developer
    
    Bill Bonney > John June 30, 2014 at 11:21pm
    
    You need to check google first as the limits are specified by them see https://developers.google.com/maps/documentation/elevation/#Limits
    
    Some of these have changed, but the 2000 characters per request has not :-(