Hi David,
On Jun 23, 2004, at 6:21 AM, Marklund David wrote:
> Hi all,
> I have tried and tried these options for plotting images, at now I
> have a OmRaster that looks good, but does not follow the scale when
> zooming or panning. Any ideas ?
Is the image changing location? Are you resizing the destination image
based on the new projection parameters?
> I would also like to know how to configure a EarthImagePlugIn layer
> and how to create a '-180/180 longitude -90/90 latitude in the
> Transverse Mercator projection ' image from my own images.
The javadocs for the EarthImagePlugIn have configuration information.
I've never created an image like that, I usually use ones from NASA.
But you could use OpenMap to create one. You could create a Mercator
projection for the size image you want, create a BufferedImage for that
size, and set the pixel values based on what should be painted at each
lat/lon. If you create a BufferedImage with ARGB type, you can leave
some pixels clear for the areas you don't have data.
- Don
> -----Ursprungligt meddelande-----
> Från: Don Dietrick [mailto:dietrick_at_bbn.com]
> Skickat: den 22 juni 2004 13:17
> Till: 'Ben Podoll '
> Kopia: Keith Alphonso; 'openmap-users_at_bbn.com '
> Ämne: Re: [OpenMap Users] re-projection an image
>
> Ben,
>
> The com.bbn.openmap.plugin.earthImage.EarthImagePlugIn does this (what
> Keith describes), but it assumes that the image ranges from -180/180
> longitude -90/90 latitude in the Transverse Mercator projection. It's
> good for those NASA images.
>
> - Don
>
> On Jun 21, 2004, at 10:25 PM, Keith Alphonso wrote:
>
>> If you know how to calculate the lat/lon from each pixel in your
>> image, you
>> can use the following algorightm to project into an openmap
>> projection.
>>
>> loop through each pixel in the openmap image object (OMRaster), map
>> that
>> pixel to a lat/lon then use your algorithm to match that lat/lon into
>> your
>> images pixel. Copy that pixel value over and move on. It aint fast,
>> but it
>> works.
>>
>>
>> -----Original Message-----
>> From: Ben Podoll
>> To: openmap-users_at_bbn.com
>> Sent: 6/21/04 4:36 PM
>> Subject: [OpenMap Users] re-projection an image
>>
>> If I have an image, and I know all the bounds and size and projection
>> (which
>> is LCC) and I need to convert it into an OpenMap supported projection
>> (directly from the image - PNG or JPEG) how can I do this? Anybody
>> have
>> an
>> application already written to do such a thing?
>>
>>
>> --
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>>
>
>
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> Don Dietrick, dietrick_at_bbn.com
> BBN Technologies, Cambridge, MA
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
>
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>
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Don Dietrick, dietrick_at_bbn.com
BBN Technologies, Cambridge, MA
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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Received on Sun Jun 27 2004 - 18:29:36 EDT