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Re: [Paparazzi-devel] Flight Plan - AGL vs alt="ground_alt+x"


From: Gautier Hattenberger
Subject: Re: [Paparazzi-devel] Flight Plan - AGL vs alt="ground_alt+x"
Date: Thu, 01 Apr 2010 14:26:12 +0200
User-agent: Thunderbird 2.0.0.24 (X11/20100317)

I added this attribute recently and you're right, it is not documented in the wiki (but it should !)

G.

Jeremy Reinertsen a écrit :
Thanks Gautier,

Just to close the loop (and now that I have the answer) I can look at the "flight_plan.dtd" file and see that waypoints are described as follows:

<!ATTLIST waypoint
name CDATA #REQUIRED
x CDATA #IMPLIED
y CDATA #IMPLIED
lat CDATA #IMPLIED
lon CDATA #IMPLIED
alt CDATA #IMPLIED
height CDATA #IMPLIED>

So there is a height attribute that can be assigned to a waypoint? It's not explicitly described in the wiki but it is implied (so to speak) in the .dtd file and if I had played around with the settings then I would have eventually discovered it for myself. But I'm not quite experienced enough to be able to derive these things by myself as yet.

I really do appreciate your help ;-)

Cheers

Jeremy




----- Original Message ----- From: "Gautier Hattenberger" <address@hidden>
To: <address@hidden>
Sent: Thursday, April 01, 2010 9:27 PM
Subject: Re: [Paparazzi-devel] Flight Plan - AGL vs alt="ground_alt+x"


Hello,

When you set a waypoint in the flight plan, you can use "height"
attribute instead of "alt". It will set the altitude to
ground_alt+height. You can also do the same in any block where "alt"
attribute is available.

Gautier

Jeremy Reinertsen a écrit :
Hi Folks,

I am familliar with assigning waypoint altitude via the format:
alt="ground_alt+100"

Is it possible to assign waypoint altitude to actual AGL value when
using SRTM data? i.e. I want the UAV to circle at an attitude which
100m AGL at the circle waypoint as opposed to 100m above the arbitary
ground alt value (presumably ground altitude at the Home waypoint).

Cheers

Jeremy
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