Tom Mahood
  • Irvine, CA
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Need advice for imaging a steep ridgeline

Started this discussion. Last reply by Tom Mahood 4 hours ago. 7 Replies

I'm interested in imaging a possible archaeological site located along the spine of a fairly steep descending ridgeline and am looking for advice on how to approach the imaging. At the very least I'd…Continue

Any good GPS cameras lighter than a Canon SX230 HS?

Started this discussion. Last reply by Tom Mahood Apr 11. 4 Replies

I've been using a Canon SX230 HS on multicopters for mapping and vertical imaging. I think it does a great job and takes fantastic pictures....but it's heavy! At 220 grams it seriously shortens…Continue

Need help with difficult analysis of log for Loiter crash

Started this discussion. Last reply by Tom Mahood Feb 21. 1 Reply

I've spent the past 4 hours going through the logs of my tricopter crash with both MP and APM Planner trying to figure out why it went down and I'm stumped. I'm decent with log interpretation and try…Continue

Tags: crash, Loiter

Not getting correct kmz files created after update of MP and 3.1 rc-7

Started this discussion. Last reply by Tom Mahood Dec 12, 2013. 2 Replies

I updated both a quad and a tricopter to 3.1 rc-7 and it appears the kmz files for the logged flights are not being written correctly. Both craft had been running 3.0.1 and creating the kmz files…Continue

 

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Latest Activity

Tom Mahood replied to Tom Mahood's discussion Need advice for imaging a steep ridgeline
"Hi Gordon....I located your sample image in Google Earth and that appears to be the exact same image at the same resolution. I'm looking for at least order of magnitude resolution better, which is why I'm considering imaging the location…"
4 hours ago
Gordon Hamm replied to Tom Mahood's discussion Need advice for imaging a steep ridgeline
"Hi Tom, Here is a satellite image of the area around Bloomfield New Mexico. Each square of the grid I laid on the image is 10 meters. The resolution is 0.119897 meters/pixel. I live in Canada so I would not be interested in the archaeological site.…"
9 hours ago
iskess replied to Tom Mahood's discussion Need advice for imaging a steep ridgeline
"I don't see why this can't be don't autonomously with a fixed wing, it will require careful manual flight planning. The AGL doesn't have to be perfectly constant, you are just stepping your flight lines to smooth out the relief…"
14 hours ago
Tom Mahood replied to Tom Mahood's discussion Need advice for imaging a steep ridgeline
"Gordon, since it involves a possible archaeological site, I'm not comfortable releasing location specifics. But generally speaking the location is on BLM land in NW New Mexico a bit southerly of Bloomington. Beyond that I'd really rather…"
16 hours ago
Gordon Hamm replied to Tom Mahood's discussion Need advice for imaging a steep ridgeline
"Please give me the lat/long position of the ridgeline."
17 hours ago
Tom Mahood replied to Tom Mahood's discussion Need advice for imaging a steep ridgeline
"Thanks for the ideas. I had hoped to do something Autonomously but given the ruggedness of the terrain I guess that's just not going to work. The terrain is an area of extremely eroded mud hills with large vertical relief. Were this a…"
17 hours ago
Tom Mahood replied to NIKOLI YAP's discussion Help with my skywalker 2014
"So have you compared that to the Aero specs? It uses an 11x7 prop with an 830 KV motor. So you have a smaller prop that will be turning considerably faster. My guess, and it's only a guess, is that your thrust will be a bit on the hot side.…"
18 hours ago
Tom Mahood replied to Justin Hardin's discussion Help! Sparks and burning electronics... no
"If your APM lights up OK when running only on your batteries (not the USB) then it's probably OK. There's a fuse between the PM input and the main power rail of the APM. If you blew that the APM won't power up via battery. But it…"
yesterday
Tom Mahood replied to NIKOLI YAP's discussion Help with my skywalker 2014
"If your motor and prop are similar to what 3DR uses and you are running 4S LiPos, then there's a good chance. It really will depend on how different your servo throws are from the 3DR Aero. But you should be in the ballpark at least."
yesterday
iskess replied to Tom Mahood's discussion Need advice for imaging a steep ridgeline
"I would do your best to follow the contours with each flight line, allowing a large overshoot to provide a reasonable climb/descent gradient. You won't be able to use the MP Survey Tool for this, it is 2D only. You won't be able to…"
yesterday
Tom Mahood posted a discussion

Need advice for imaging a steep ridgeline

I'm interested in imaging a possible archaeological site located along the spine of a fairly steep descending ridgeline and am looking for advice on how to approach the imaging. At the very least I'd like to be able to produce a high resolution mosaic of the site, but ultimately I'd like to have a 3D surface generated pending establishment of ground control points.The area I'd like to image is roughly a rectangle 200 meters by 500 meters, with the ridgeline centered along the long axis of the…See More
yesterday
Tom Mahood replied to Steven McAdam's discussion Landing in Stabilize Mode
"I do a bit of adjusting the pitch since the motor is usually at idle and I need the nose down a little for forward speed. Remember all Stabilize does is level the aircraft if you release the sticks.  I haven't tried it but I suspect if I…"
Wednesday
Tom Mahood replied to Steven McAdam's discussion Landing in Stabilize Mode
"I hand launch and land in Stabilize mode. Works really well. I used to do it in Manual and had many....exciting times. No drama at all in Stabilize."
Tuesday
Tom Mahood commented on Thomas J Coyle III's blog post First UAV Near Miss with Ag Aircraft Reported in Pacific Northwest
"Hey, one other thing in regards to this. Have a look at the source article for this bit of news, located here.  Notice anything odd? There are no names, dates or even locations (other than Idaho) anywhere in the piece. There isn't even a…"
Jul 25
Tom Mahood commented on Thomas J Coyle III's blog post First UAV Near Miss with Ag Aircraft Reported in Pacific Northwest
"@Thomas, I am only going by the facts as stated in the source news article, which is silent as to that. But it appears the farmer knew who the individual was. It could well be that a general blanket permission had been granted ("Fly your little…"
Jul 25
Tom Mahood replied to Richard Ferreeira's discussion tricopter on pixhawk?
"David, that's exactly the wiring hookup to use. It should work fine."
Jul 21

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Rotors and fixed wing

Tom Mahood's Blog

Personal Drones May Present Public Safety Concerns

Posted on August 29, 2013 at 10:30pm 9 Comments

...Or so says the Joint Regional Intelligence Center. JRIC is yet another anti-terrorist agency most people have never heard of and is comprised of the Feds and law enforcement agencies in the counties of Southern California. The following single page…

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A composite folding H-quad

Posted on August 21, 2013 at 12:40pm 18 Comments

I've just wrapped up a new design based upon a lot of ideas I stole found on this site.…

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Comment Wall (1 comment)

At 7:14pm on December 12, 2013, Dennis Okeefe said…

this is cool.  i was looking for how to import .kmz files into mission planner and saw your post about exporting them.  i immediately realized who you were since i am a big fan of yours - black world stuff you have posted.  are you new to this "hobby"?   it would be a useful tool for "research".  anyway, do you know if you can import data directly from google earth into mission planner?  

timmy

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