Eric Tweet
  • Male
  • Nome, AK
  • United States
Share

Eric Tweet's Friends

  • Soren von Perner
  • Nathan Reim
  • Bradley J Carr
  • John Bond
  • healthyfatboy
  • AKRCGUY

Eric Tweet's Groups

Eric Tweet's Discussions

Use Google Elevation for 'Verify Height'

Started this discussion. Last reply by Raquel Sebastià Sala Jun 23. 14 Replies

I was planning a mission in an area which either has no SRTM elevation data or bad (i.e. all elevations are 0m) data. When attempting to use the 'verify height' option while creating waypoints,…Continue

Broken PDB? - Voltage on Signal Pins

Started this discussion. Last reply by Eric Tweet Oct 29, 2012. 4 Replies

After several flights with my new hexa, I've run into a problem. Motor number 3 does not spin when the others do. Long story short, I narrowed it down to something with the PDB. If I plug motor 3…Continue

Tags: problem, voltage, board, distribution, power

A Curious Demise

Started this discussion. Last reply by Eric Tweet Oct 10, 2012. 2 Replies

After waiting for the weather to clear up,…Continue

Tags: gopro, crash, 2.6

5.8 GHz and 433 MHz Interference

Started this discussion. Last reply by Bjarni Sep 18, 2012. 1 Reply

In my attempts to throw together a somewhat long range system for my plane, I've run into a few issues. First, the equipment in question is a 500mW 5.8 GHz video tx, and a 433 Mhz RC rx. I'm aware…Continue

Tags: range, jumper, rf, long, lrs

 

Eric Tweet's Page

Latest Activity

Raquel Sebastià Sala replied to Eric Tweet's discussion Use Google Elevation for 'Verify Height'
"Wow, great! Thank you very much!!!!! "
Jun 23
Adam Kroll replied to Eric Tweet's discussion Use Google Elevation for 'Verify Height'
"Yes, thats right, give it a go, its a pretty cool feature to see your plane fly up and down over the hills autonomously!!"
Jun 23
Raquel Sebastià Sala replied to Eric Tweet's discussion Use Google Elevation for 'Verify Height'
"Thanks Adam! Let me check if I understood it right, planning a mission with "verify height" only considers terrain altitude to set waypoint altitude, and the plane will flight straight from one to another.…"
Jun 23
Adam Kroll replied to Eric Tweet's discussion Use Google Elevation for 'Verify Height'
"Hi Raquel, Have a read through this page http://plane.ardupilot.com/wiki/common-planning-a-mission-with-waypoints-and-events/common-terrain-following/, it explains really well where the data's coming from and  how its loaded onto the…"
Jun 22
Raquel Sebastià Sala replied to Eric Tweet's discussion Use Google Elevation for 'Verify Height'
"Uf... that's quite inconvenient to check afterflight if the terrain following is performed properly, but if SRTM has more reliable data then it makes sense to use it. I was also thinking about what you said in a previous post: "Google…"
Jun 22
Adam Kroll replied to Eric Tweet's discussion Use Google Elevation for 'Verify Height'
"Yes, thats very interesting, that there's a difference.  It appears that the google earth file has been either filtered or the grid they use, that this profiles been sampled from is at a lower resolution than the SRTM data. The most SRTM…"
Jun 19
Raquel Sebastià Sala replied to Eric Tweet's discussion Use Google Elevation for 'Verify Height'
" The image below is from an area where Mission  Planner does not have SRTM info (N42W000), I think it is easy to appreciate with this example that "verify height" works only with SRTM "
Jun 19
Adam Kroll replied to Eric Tweet's discussion Use Google Elevation for 'Verify Height'
"Ardupilot and google use the exact same source, 3 second SRTM data, so if there are differences, something has gone wrong, which you want to be careful of if you're using terrain following for avoiding crashing into hills etc.  If…"
Jun 18
Raquel Sebastià Sala replied to Eric Tweet's discussion Use Google Elevation for 'Verify Height'
"Importing SRTM data worked for me, but I'd like the Mission Planner to use Google Earth data, since I like to analyse my flights in Google Earth and sometimes the differences are quite noticeable. Do anyone know if it is possible to change from…"
Jun 18
Eric Tweet replied to Eric Tweet's discussion Use Google Elevation for 'Verify Height'
"Yes, it looks like the MP code supports both 1 second and 3 second formats. I tested it with 1 second (the only resolution which mission planner grabs automatically for areas where data is available) and everything worked fine. I don't…"
May 21
Adam Kroll replied to Eric Tweet's discussion Use Google Elevation for 'Verify Height'
"You should have 30m resolution SRTM too, which is quite accurate to a few metres."
May 21
Eric Tweet replied to Eric Tweet's discussion Use Google Elevation for 'Verify Height'
"Figured this one out. Problem: Missing data for much of Alaska (and similar latitudes in other places) for the SRTM version in the available repositories. Solution: Get the files yerself! For example, a mission to be planned at N64.5 W165.5 requires…"
May 20
Eric Tweet replied to Eric Tweet's discussion Use Google Elevation for 'Verify Height'
"I thought something like that to be the case. However, when looking at the elevation profile of a planned flight, the SRTM profile is flat (nothing there), and the GE profile shows a reasonable, if sparse, profile. I'm not really concerned with…"
May 20
Adam Kroll replied to Eric Tweet's discussion Use Google Elevation for 'Verify Height'
"Google earth uses SRTM data, which is what ardupilot uses, its the same data source."
May 14
Eric Tweet posted a discussion

Use Google Elevation for 'Verify Height'

I was planning a mission in an area which either has no SRTM elevation data or bad (i.e. all elevations are 0m) data. When attempting to use the 'verify height' option while creating waypoints, everything is referenced to the missing/bad SRTM data. Looking at the elevation graph, there is good Google Earth (GE) data. Can I switch to using Google Earth elevations for 'verify height' and terrain following somehow? Perhaps this is something obvious I've overlooked.CheersSee More
Apr 18
Tom Gilmour commented on Eric Tweet's blog post Flaperon Trial
"Hi.  I just found this thread, on my plane I have multiple ailerons enabled (using two channels from the Tx) I'm interested in trying a mild flaperon mix on the APM to assist with rolling takeoff in windless conditions (the plane does not…"
Aug 8, 2013

Profile Information

About Me:
I'm a surveyor and geospatial engineer!
Please tell us a bit about your UAV interest
T-Rex 600E with custom camera mount. Always trying to get the darn thing working right... Arducopter is my new obsession.
Hometown:
Nome

Eric Tweet's Blog

Criminalizing Drones in Oregon

Posted on January 31, 2013 at 8:52pm 34 Comments

Sad news from the northwest. It sounds like it may become a Class B Misdemeanor to simply own a drone capable of video or photo, and a Class A to fly it.

Check out the…

Continue

Hexa Fun

Posted on October 26, 2012 at 1:52am 4 Comments

I've managed to get everything up and running again! This is my newish hexa from uDrones (I've decided to forgo a rant on that subject for now). After working around my PDB issue (still unsolved) and engaging in some…

Continue

APM1 > APM2?

Posted on June 13, 2012 at 10:00pm 7 Comments

To avoid confusion, I ought to preface this post by mentioning that I began tests quite some time ago with the APM2 purple board. Since then I've gotten my hands on it's older brother the APM1 (hey, they're cheap now and then!). I have the APM2 in my heli now, so I decided to throw the APM1 on my quad in place of the APM2 to see how things compare...

So that might be a bit of an excessive title, but if I didn't know the differences between the two boards, I…

Continue

T-Rex 600E with APM2 - Test Flight

Posted on June 4, 2012 at 9:37pm 21 Comments

As requested, here is a clip of one of my test flights with the APM2 on my 600. This may be the most boring video ever, but in this case, boring is exciting! The APM2 works amazingly well mounted on Align gel, where a tail gyro normally sits. Stabilization is very good using  …

Continue

Comment Wall

  • No comments yet!

You need to be a member of DIY Drones to add comments!

Join DIY Drones

 
 
 

DIY Drones Monthly
Newsletter

Groups

Season Two of the Trust Time Trial (T3) Contest 
A list of all T3 contests is here. The current round, the Pylon Race, is here

© 2015   Created by Chris Anderson.

Badges  |  Report an Issue  |  Terms of Service