<html><body name="Mail Message Editor"><br>On Jun 13, 2008, at 2:56:35 PM, "Gerald I. Evenden" <geraldi.evenden@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; ">My sentense had nothing to do with area and by Cartesian usage I was denoting<span class="Apple-converted-space"> </span><br>measuring distances, azumuths, etc. from the Cartesian data and it certainly<span class="Apple-converted-space"> </span><br>seems that scale error greatly affects these measurements.<br></span></blockquote>Yes. Scale error greatly affects those measurements... but you're not going to get any better results with equal-area maps for those measurements than you will from conformal. That is because the "scale error" is just as pronounced in equal-area maps as it is in conformal maps. Hence...<div><br></div><div>"<span class="Apple-style-span" style="font-family: -webkit-monospace; font-size: 11px; ">Extended geographic range usage of any conformal projection is a contentious issue as any resultant grid system has sufficiently large scale errors as to make the Cartesian usage of the grid very questionable.</span>"</div><div><br></div><div>...does not follow. The only clearly improved measurement you'll get from equal-area maps is measurement of, well, area. You'll generally find approximations of azimuths to be much easier on conformal maps than equal-area. Distances are a mess on conformal or equal-area either one.<div><br></div><div>Regards,</div><div>-- daan Strebe<br><div><br></div></div></div><div class="aol_ad_footer" id="u52F8A496C40D4731B0E1E0970F5D73BA"><FONT style="color: black; font: normal 10pt ARIAL, SAN-SERIF;"><HR style="MARGIN-TOP: 10px"><A title="http://toolbar.aol.com/moviefone/download.html?ncid=aolcmp00050000000011" href="http://toolbar.aol.com/moviefone/download.html?ncid=aolcmp00050000000011" target="_blank">Get the Moviefone Toolbar</A>. Showtimes, theaters, movie news, & more!</FONT></div></body></html>