Re: [OpenMap Users] Accessing DTED data

From: Don Dietrick <>
Date: Wed, 8 Aug 2007 23:06:42 -0400

Hi Jerome,

You'll find something like this in the
com.bbn.openmap.layer.terrain.TerrainLayer, using the ProfileGenerator.

The best way to get the information you want is to copy the
ProfileGenerator and the way it uses the
com.bbn.openmap.dataAccess.dted.DTEDFrameCache. You would ask the
DTEDFrameCache for the elevations at certain lat/lon points, and you
wouldn't have to worry about the DTEDFrames. The DTEDFrameCache
knows how to access the data.

Hope this helps,


On Aug 8, 2007, at 6:14 AM, TRAN Jerome wrote:

> Hello,
> I want to get an elevation profile over a line. I mean the user is
> drawing a line on the map, then the application draws a 2D plot of
> the elevation (Y) every "k" meters (following the line). I hope
> you understood ^^
> I got DTED level 0 data, i am displaying it with a DTEDLayer and
> accessing to the elevation of a single LatLonPoint with something
> like :
> # DTEDFrame DTED=new DTEDFrame("D:/jtran/DTEDMED/dted/e001/
> n44.dt0",true);
> # System.out.println("test="+DTED.elevationAt(44, 1));. //
> everything is working so i can assume that my DTED is supported by
> OpenMap.
> Is it possible to "fuse" DTEDFrames in order to use the
> getElevations(...) method for long distances, when my "extraction
> line" is crossing more than one DTED Frame ? Maybe i missed
> something and this is already implemented (probably), in that case
> how do you do ? Maybe DTEDAdmin ?
> Please answer me, thank you,

Don Dietrick,
BBN Technologies, Cambridge, MA

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Received on Wed Aug 08 2007 - 23:07:44 EDT

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