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Hello,<br>

<br>

I'd like to use the Delphi PROJ API to translate coordinates. The

coordinates come from GoogleMaps, thus are lat/lng values.<br>

<br>

I want to match them to shapes from a shape file which I can read with

the ShapeAPI. I have got the following information the the prj file of

the shape:<br>

PROJCS["Germany_Zone_3",GEOGCS["GCS_Deutsches_Hauptdreiecksnetz",DATUM["D_Deutsches_Hauptdreiecksnetz",SPHEROID["Bessel_1841",6377397.155,299.1528128]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",3500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",9.0],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]<br>

<br>

Therefore I thought that the TCoordinateTranslator I named "Proj"

should be opened with:<br>

Proj.Open('+proj=tmerc +ellps=bessel +lon_0=9 +x_0=3500000');<br>

<br>

...but I am not very familiar/experienced yet.<br>

<br>

Anyway I have test coordinates from GoogleMaps, e.g. (50.1056069418592,

8.404541015625). The region this coodinates lay in as exactly the

region that is covered by shapes in the shape file. The bounds of the

shape file are, according to what the ShapeAPI returned:<br>

( 3394468.028, 5504381.719,0.00,0.00) to ( 3424916.697,

5537463.422,0.00,0.00)<br>

<br>

But the translated Google coordinates are:<br>

8451430,97 m, 1229074.77 m<br>

<br>

Which is totally elsewhere.<br>

<br>

My question is: Did I read the values from the shape's prj file wrong?

Or did I use the wrong parameters when setting up the

TCoordinateTranslator?<br>

<br>

Any help for a better understanding of this matter would be greatly

appreciated.<br>

<br>

<div class="moz-signature">Regards,<br>

<br>

Christian Kirchhoff<br>

<small><b>Directmedia Publishing GmbH</b> · Möckernstraße 68 · 10965

Berlin<br>

<a class="moz-txt-link-abbreviated" href="http://www.digitale-bibliothek.de">www.digitale-bibliothek.de</a><br>

AG Berlin-Charlottenburg · HR B 58002 · USt.Id. DE173211737<br>

Geschäftsführer: Ralf Szymanski · Erwin Jurschitza</small></div>

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