Line/Sample to Ground Points

[Randy Moore-2]

Hi There,

 

I was curious if there is any code in OpenMap that would take an image file that is stored in line/sample (with the 4 corner point coordinates stored seperately), that rotates and skews the image so that it can be overlayed onto the map. The image may come from commercial airborne sensors and be in GeoTiff or JPEG format. I deally I would like to convert image to PNG where the black border pixels are made to be transparent. I had a method based on bilinear interpolation, but it is quite slow (8+seconds to convert).

 

Thanks,

 

Randy Moore

[SEmert]

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From the Openmap website I was able to obtain and diplay ETOPO data for 5, 10, and 15 minute intervals.  Is there any way to get ETOPO2 or ETOPO1 data in the format that I can display within Openmap?  If not from the Openmap web site, is there someplace else that I can get the data and convert it into a format that will display properly in Openmap?

Thanks,

Scott Emert

[Don Dietrick-2]

Hi Scott,

I've just downloaded ETOPO level 1 data, so I'm sure of the
differences between that format and the ones available
on the OpenMap website for 5/10/15.  I think I have some old level 2
data lying around 2 that I'd have to check out.

It'll have to wait a bit until the OM5 release gets pushed out, but
I'll ping you if it works for me.  Did you get the ETOPO1/2 from the
NOAA website?

- Don

On Sun, Oct 16, 2011 at 6:38 AM, Scott Emert <semert@...> wrote:

> ________________________________
> From the Openmap website I was able to obtain and diplay ETOPO data for 5,
> 10, and 15 minute intervals.  Is there any way to get ETOPO2 or ETOPO1 data
> in the format that I can display within Openmap?  If not from the Openmap
> web site, is there someplace else that I can get the data and convert it
> into a format that will display properly in Openmap?
>
> Thanks,
>
> Scott Emert
>

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[Don Dietrick-2]

Hi Randy,

How were you doing the warping yourself?  Were you using the OMWarpingImage?

The other thing you can do is to run it through GDAL and turn it into
a set of tiles, and then use the
com.bbn.openmap.imageTile.MapTileLayer to display the tiles.  If you
use GDAL to convert an image to tiles, you have to use a
com.bbn.openmap.dataAccess.mapTile.TMSMapTileCoordinateTransform in
the MapTileLayer.  The MapTileLayer javadocs should have details on
how to do that.

- Don

On Sun, Oct 16, 2011 at 6:06 AM, Randy Moore <jrmoore1953@...> wrote:

> Hi There,
>
> I was curious if there is any code in OpenMap that would take an image file
> that is stored in line/sample (with the 4 corner point coordinates stored
> seperately), that rotates and skews the image so that it can be overlayed
> onto the map. The image may come from commercial airborne sensors and be in
> GeoTiff or JPEG format. I deally I would like to convert image to PNG where
> the black border pixels are made to be transparent. I had a method based on
> bilinear interpolation, but it is quite slow (8+seconds to convert).
>
> Thanks,
>
> Randy Moore

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