Jump to content
The simFlight Network Forums

Ground elevation at arbitrary lat/lng position


Recommended Posts

Moved to Main Forum. Please ask questions related to FSUIPC always in Main Forum!

Is there a way to get the ground elevation for a given latitude/longitude position. I need to get the current ground elevation (representing the scenery) at a given position, which is NOT my own aircraft's position and NOT the position of another AI aircraft.

I know how to do it with FSX and P3d/simConnect, but need a similar function for FS9.
Any hint how I can do it (if possible)?

Link to comment
Share on other sites

On 4/17/2018 at 1:29 AM, KWB said:

I know how to do it with FSX and P3d/simConnect, but need a similar function for FS9.
Any hint how I can do it (if possible)?

How are you doing it with FSX and P3D? Just via SimConnect?

I'm afraid I don't know a way with FS9. If it is possible with SimConnect in FSX then it could probably be hacked with FS9, but I'm afraid I no longer develop for FS9 at all. It is nearly 15 years old, after all!

Pete

 

Link to comment
Share on other sites

On P3D there is a function for that (SimConnect_RequestGroundInfo, not compatible with FSX), new P3D API. For FSX I create a bogus AI object and query the position at its position (kind of hack but working). For the later I still search a way to create an invisible AI object https://www.fsdeveloper.com/forum/threads/invisible-or-very-small-ai-object.442575/

  • Like 1
Link to comment
Share on other sites

4 hours ago, KWB said:

On P3D there is a function for that (SimConnect_RequestGroundInfo, not compatible with FSX), new P3D API

I honestly hadn't noticed that! Was that in the original 4.0 or one of 4.1 / 4.2. I'll need to check back through my SDK collection.

In that case I will consider adding a facility in FSUIPC5 to also access such data through the FSUIPC interface.

Pete

 

Link to comment
Share on other sites

8 hours ago, KWB said:

I can not exactly say, but there are already question about the function back in 2012: http://prepar3d.com/forum/viewtopic.php?t=7290

Checking back the function seems to have been added some time in the life of P3D3, or perhaps even earlier (I no longer have older SDKs).

I see the function returns a grid. For the basic purpose of returning altitude at a single point, do you specify a grid of 1 x 1 point? Min altitude 0, max, what, 30000 ft+? (I'm not really sure of the purpose of specifying min and max altitudes).

I'd just like to clarify this as it would be useful to have a simple FSUIPC function for the altitude at a specific point. I don't really foresee implementing an arbitrary matrix -- such a return doesn't suit the offset methods and there really isn't any flexible offset space available to suit the size of matrix which would be needed for something like the Boeing ND terrain displays.  Those are usually generated from databases in any case.

Oh, and back to your real question, sorry, but I'm only talking about FSUIPC5 and P3D4 here. I'm afraid I've no idea about FS9.

Pete

 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use. Guidelines Privacy Policy We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.