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<DIV><FONT face=Arial size=2><FONT face="Times New Roman" size=3>Dear
sir.<BR>Ive visited the Proy4 site and I found it so interesting.<BR>Im Engineer
Surveyor and MSc Geodesist from Chile, Ive participated<BR>as "wriier"
in the Technical Manual for Secretary of Publics Works, focusing<BR>Roads
Enginiering Projects. On that manual we have introduced as<BR>standard the TM
modified projection. That modified is dued to high<BR>terrain to
conserve horizontal distances in the projection used to<BR>construct,
avoiding deformations between the project and the final work.<BR>The rules we
have imposed is mainly in to the Scale Factor in the<BR>central meridian,
calculated by the function of mean radious "R" and the<BR>elipsoidal heigh "h":
Ko=(R+h)/R<BR>The surface of the resultant cilinder "pass" over the earth
surfece<BR>(terrain) where the road is placed.<BR>By the another habd we are
starting to use as official geodetic<BR>reference Sirgas, coincident with
ITRF2000, as well the rest of<BR>Southamerican countries.<BR>Is in your project
consider that kind of projection and geodetic<BR>references?.<BR>Best
regards</FONT><BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2>René Zepeda Godoy<BR>Curicó 161 depto 32 -
Santiago<BR>lat:33º26´37.8"S lon:70º38´08.5"W<BR>tel 634-1348
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