[OSRS-PROJ] CBuilder and Delphi

[Alexander Weidauer]

AYDIN ERTURK wrote:

>Hi,
>Thank you for your answer.
>I downloaded prod.dll and projapi and i modified testproj (for Delphi)
>applivation.
>So it worked.
>But i could not understand the results.
>I want to do that I have radar data and center point langitude and latitude
>are known.
>How can convert pixel to geographic coordinate by using proj4 lib.
>
>Regards
>
>----- Original Message -----
>From: "Alexander Weidauer" <alex.weidauer at huckfinn.de>
>To: <osrs-proj at remotesensing.org>
>Sent: Tuesday, July 23, 2002 10:10 PM
>Subject: Re: [OSRS-PROJ] CBuilder and Delphi
>
>
>AYDIN ERTURK wrote:
>
>>Hello,
>>
>>
>>
>>I want to use proj4 lib with in CBuilder.
>>
>>Could you help me about this work?
>>
>>
>>
>>Aydin Gürol Ertürk
>>Software Engineer
>>Remote Sensing Division
>>Turkish State Meteorological Service
>>
>Hi all,
>
>I've uploaded the sources for the BCC5.5 proj 4 DLL and API Project.
>You can download binaries and sources under
>
>http://www.triplexware.huckfinn.de/geogfix.html#proj
>
>Sorry a better documentation is coming soon. ;o(~
>
>Frank, I' have copylefted my stuff under mozilla 1.1 it's ok ?
>
>Bye Alex
>
>
>
>
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Hi Aydin,

I don't know how how your project is defined and how your transformation 
jobflow works.
The porj library gives you the possibility to transfor coordinates  
between  catrographic/geographic
and geodestic datums (like longitude latitude to a plain coordinate 
system). If you have a "user
coordinate system" like a image or a local location measurement you have 
to reference this system to
one of  in your background laying geographic coordinate systems (p.h.a 
satellite image will be
referenced and resampled to a UTM map datum).  After this operation you 
can determin the geodestic
coordinates.

If you use direct polar coordinates like in geophysical applications 
(earthquake location, satellite positions or
positions of air planes) you can use Great Circla Calculations (..see 
geod in the proj project or
function geodetic in uCoordinates).

To answer your questions more exactly I need more informations about 
your problem.

Bye Alex



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