Només apuntar que cal tenir cura de quines dades s'estan usant darrere... La majoria només són vàlides als EEUU...<br><br><div class="gmail_quote">2011/9/27 Raf Roset <span dir="ltr"><<a href="mailto:rafroset@gmail.com">rafroset@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Datums verticals per combinar dades en 3D <a href="http://vdatum.noaa.gov/" target="_blank">http://vdatum.noaa.gov/</a><br>
<font color="#888888"><br>Raf<br>
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