[mapserver-users] Projection question - Australia
Marie Flanagan
theflan@gofree.indigo.ie
Wed, 10 Apr 2002 18:08:09 +0100
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Hi all,
I have a question about projection. My map data of the NSW area of =
Australia uses WGS84 datum and spheroid. Units are in geographic =
Digital Degrees. This looks fine when displayed in mapserver.
I also have a flat file of x,y co-ordinates from the AMG zone 55 which I =
want to overlay on the map. I have managed to figure out how to =
generate a shape file for this. But I am now left with the question of =
how to convert from AMG cartesian co-ords to WGS longitude and latitude. =
I think it may be possible to convert these using PROJ4 before I create =
the shape file, but I am not sure if it's possible to convert from AMG =
to WGS.
I will continue to search for PROJ4 examples to see if this is possible =
but in the meantime if anyone could advise I would be most grateful. I =
am not a cartographer so excuse any obvious ignorance in the wording of =
my question!
Regards,
Marie=20
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<DIV><FONT face=3DArial size=3D2>Hi all,</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>I have a question about =
projection. My map=20
data of the NSW area of Australia uses WGS84 datum and spheroid. =
Units are=20
in geographic Digital Degrees. This looks fine when displayed =
in=20
mapserver.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>I also have a flat file of x,y =
co-ordinates from=20
the AMG zone 55 which I want to overlay on the map. I have managed =
to=20
figure out how to generate a shape file for this. But I am now =
left with=20
the question of how to convert from AMG cartesian co-ords to WGS =
longitude and=20
latitude. I think it may be possible to convert these using=20
PROJ4 before I create the shape file, but I am not sure if it's =
possible to=20
convert from AMG to WGS.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>I will continue to search for PROJ4 =
examples to see=20
if this is possible but in the meantime if anyone could advise I would =
be most=20
grateful. I am not a cartographer so excuse any obvious ignorance =
in the=20
wording of my question!</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>Regards,</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>Marie </FONT></DIV></BODY></HTML>
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