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Be sure your projection and datum are the same for MapX and Proj4. It
looks like you used the MapX "generic" lat/long for the MapX
input, which can lead to strange behavior (MapX will match the projection
to other layer present in the workspace). And it looks like MapX defaults
to NAD27 for the Robinson. <br><br>
Rich<br><br>
7,231,574.7, 2,489,028.1<br><br>
At 03:18 PM 1/16/2002 +0530, you wrote:<br>
<blockquote type=cite class=cite cite><font face="arial" size=2>hi</font><br>
<font face="arial" size=2>I have been trying to project lat/long values
to robinson projection using Proj4 library</font><br>
<font face="arial" size=2>But the result given by pro4 library is
diffrent from those when evaluated by MapX</font><br>
<br>
<font face="arial" size=2>For eg.</font><br>
<font face="arial" size=2>In Proj4: Input lat/long (78.410700,23.271500)
</font><br>
<font face="arial" size=2>Output in Robinson projection is
(7233791.379929,2488879.797312) unit is meters</font><br>
<br>
<br>
<font face="arial" size=2>For the same input in MapX lat/long
(78.410700,23.271500) </font><br>
<font face="arial" size=2>Output in Robinson projection is
7231619.5648,2488958.638</font><br>
<br>
<font face="arial" size=2>Thus is is appox a diffrence of 2172 meters in
x</font><br>
<font face="arial" size=2>and 79 meters in y</font><br>
<br>
<font face="arial" size=2>Their is never a accurate match for Pro4
projected value and MapX projected value.</font><br>
<font face="arial" size=2>Can anybody help me to resolve it</font><br>
<br>
<font face="arial" size=2>Regads</font><br>
<font face="arial" size=2>Pranav</font></blockquote></html>