You have to realize that scanned maps (legally or illegally scanned) are
designed to be read by humans. So when the map maker makes the map, you
will find that he moves roads so that the reader can see them, therefore
when you apply GPS to it you will be miss-mapped. You really have to
use road centre lines which cost an arm and a leg in New Zealand.
regards Tony Goodrich
> -----Original Message-----
> From: Tony Blomfield [SMTP:[EMAIL PROTECTED]]
> Sent: Wednesday, 6 October 1999 11:26
> To: Multiple recipients of list delphi
> Subject: [DUG]: Mapping and GPS
>
> HI.
> I have an urge to write my own GPS plotter software. This is purely a
> hobby.
>
> I am interested in taking a paper map, and scanning it in, then
> writing some
> picture clean up and documenting stuff. I also need to figure out how
> to map
> the lat long coordinates on to the image, which map projections to use
> etc
> Tec. I suppose I will then store the images in an IB database, for
> later
> retrieval. The next step is to bring in the NMEA message from the GPS
> and
> plot the real-time coordinates on the picture. Hopefully this part is
> straightforward. It is the picture conversion clean up and coordinate
> mapping that has me stymied.
>
> If anybody knows of any components I should look at, or can point me
> at any
> knowledge base on the subject, I would be grateful.
>
> TIA,
>
> Tony.
>
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> -----
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