Thread Subject: Georeferencing like in ArcMap

Hey,

Is there a way of georeferencing images in Matlab in a
similar way to ESRI ArcMap? Basically, I have a list of
UTM coordinates, and a corresponding list of image pixel
coordinates. I want to reference these pixel coordinates
to the UTM coordinates, and produce a worldfile based on
this

I've followed the georeferencing tutorial in the mapping
toolbox, but that seems to be reliant on me having a base
image from which to load control points. However, I don't
have a base image, just a list of coordinates.

Any help would be appreciated..!

bump!

Hi!
I've been working with the Mapping toolbox a lot
lately...and I programmed all the georeferencing myself. So
maybe I can give you some hints but unfortunately I have no
clue what ESRI ArcMap is...

> Is there a way of georeferencing images in Matlab in a
> similar way to ESRI ArcMap? Basically, I have a list of
> UTM coordinates, and a corresponding list of image pixel
> coordinates. I want to reference these pixel coordinates
> to the UTM coordinates, and produce a worldfile based on
> this
>
> I've followed the georeferencing tutorial in the mapping
> toolbox, but that seems to be reliant on me having a base
> image from which to load control points. However, I don't
> have a base image, just a list of coordinates.
>
> Any help would be appreciated..!

"Volker K" <klinkv.NOSPAM@yahoo.de> wrote in message
<fph5nt$q2n$1@fred.mathworks.com>...
> Hi!
> I've been working with the Mapping toolbox a lot
> lately...and I programmed all the georeferencing myself.
So
> maybe I can give you some hints but unfortunately I have
no
> clue what ESRI ArcMap is...
>

Thanks. ArcMap is a GIS program. Basically, it lets you
georefence an image by selecting image pixel coordinates,
and entering the associated geographical coordinates - eg.
pixel coordinate (2031 3063) -> real world coordinate
(345632, 984657). Once you've entered enough pixel/world
coordinates, it can infer a transformation, and produce a
worldfile for your image.

Have you come across any way of doing this in Matlab? I've
followed the tutorials, and it seems that the only way to
do it is to have a base image to georeference your new one
to...

> Thanks. ArcMap is a GIS program. Basically, it lets you
> georefence an image by selecting image pixel coordinates,
> and entering the associated geographical coordinates - eg.
> pixel coordinate (2031 3063) -> real world coordinate
> (345632, 984657). Once you've entered enough pixel/world
> coordinates, it can infer a transformation, and produce a
> worldfile for your image.
>

Hello, a year from now I'm trying to do the exact same thing. I stumbled upon this thread from a search engine but have no knowledge of MATLAB itself. Is this possible? Should I learn MATLAB to do it? Is there a better way?
Thanks for your help guys. Will

"..." wrote in message <fp1sa3$eot$1@fred.mathworks.com>...
> Hey,
>
> Is there a way of georeferencing images in Matlab in a
> similar way to ESRI ArcMap? Basically, I have a list of
> UTM coordinates, and a corresponding list of image pixel
> coordinates. I want to reference these pixel coordinates
> to the UTM coordinates, and produce a worldfile based on
> this
>
> I've followed the georeferencing tutorial in the mapping
> toolbox, but that seems to be reliant on me having a base
> image from which to load control points. However, I don't
> have a base image, just a list of coordinates.
>
> Any help would be appreciated..!

Hey Steve

I came across this thread . I have a jpg image and I want to goreference it. Now I also have four points on that image whose geographical coordinates I know. After converting this four point to UTM I am stuck at step as to How shall I use matlab to georeference it. I got an idea from your post that you have some clue to it but I was not able to find this tutorial in matlab

Could you point me this

Regards