Hi John
I have this same problem on all of my images that I am asked to display.
Therfore I purchased the application "Manifold" www.manifold.com .
This package is very reasonbly priced at $250 and will take an image of known projection and re-project it to one sutable for the use in Openmap. If you do not know the projection of the image, it will georeference using 4 or more points(this can be inacurate depending on the original projection, but more points will help).
Take a look at it .. If it helps send me your image and I will re-project it for you to see if it meets your requirements
Regards
Mark
-----Original Message-----
From: owner-openmap-users_at_bbn.com [mailto:owner-openmap-users_at_bbn.com]On
Behalf Of John E. McKim
Sent: 14 October 2005 14:53
To: Don Dietrick
Cc: openmap-users_at_bbn.com
Subject: RE: [OpenMap Users] OMScalingRaster
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Hi Don,
The image is defined in terms of decimal degree lat/lon and
represents the vertices of the image. The OMScalingRaster only has a 2
point (ullat,ullon,lrlat,lrlon,image) constructor, but I have been given
a 4 point lat/lon image to be placed on the map, that needs to be
georeferenced. The 4 points trace out, counterclockwise, a rectangle
that is the virtices of the image. So its easy to determine the center
of the rectangle, but it's a little harder to determine the angle of
rotation of the image with respect to try north (to use for the
OMScalingRaster method call (setRotationAngle()), so I thought that I
would ask if anyone had done it.
John
-----Original Message-----
From: Don Dietrick [mailto:dietrick_at_bbn.com]
Sent: Friday, October 14, 2005 9:39 AM
To: John E. McKim
Cc: openmap-users_at_bbn.com
Subject: Re: [OpenMap Users] OMScalingRaster
Hi John,
Is your image still being defined in terms of decimal degree lat/lon
data, even with the four points? What do the four points represent?
- Don
On Oct 13, 2005, at 6:01 PM, John E. McKim wrote:
>
> Hi,
> I'm trying to display rectangular images on a map but using 4
> points instead of 2 points. Has anyone developed a routine within
> openmap or independently that would convert the 4 points into a 2
> point OMScalingRaster together with a rotation?
> John
>
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Don Dietrick, dietrick_at_bbn.com
BBN Technologies, Cambridge, MA
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Received on Mon Oct 17 2005 - 03:19:15 EDT