<html><body name="Mail Message Editor"><br>On Mar 29, 2009, at 9:10:46 AM, "Richard Greenwood" <richard.greenwood@gmail.com> wrote:<br><blockquote style="padding-left: 5px; margin-left: 5px; border-left-width: 2px; border-left-style: solid; border-left-color: blue; color: blue; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: -webkit-monospace; font-size: 11px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0; ">The "computational burden" of comparing the input and output datum is<br>no more intensive than converting from radians to degrees.</span></blockquote>
<div><br></div><div>But this is quite my point about misplaced conceptual burdens. Many people do not even have datums attached to their cartographic data because the datum is irrelevant at the scale they are working.. What is the use of forcing them to declare a fictitious datum in order to satisfy an ideological conflation of datum and projection?</div><br><blockquote style="padding-left: 5px; margin-left: 5px; border-left-width: 2px; border-left-style: solid; border-left-color: blue; color: blue; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: -webkit-monospace; font-size: 11px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0; ">Hopefully<br>you will not argue that we limit ourselves to radians. The "conceptual<br>burden" is more subjective, but closer to my point: That to a growing<br>number of users, datum does matter.<br></span></blockquote><div>The number may be growing, but they will never be even close to everyone. I do not agree everyone should be forced into artificial procedures in order to save some fraction of them from their own ignorance. That is arrogance, if nothing else. No one knows what is best for everyone. Datum and projection are distinct. Let those who need to treat them distinctly, treat them distinctly. Let those who may or must ignore datums, ignore datums.</div><div><br></div><div>Regards,</div><div>— daan Strebe</div><div><br></div><div class="aol_ad_footer" id="u8B05358B454643D293C5F41A79766CDA"></div></body></html>