[mapserver-users] Projection object parameters for UTM to lat-long

[Bistrais, Bob]

Hi Pietro,
 
That was it!  After making this correction, it works!  
 
Thank you,
Bob

________________________________

From: Pietro Giannini [mailto:pgiannini at bytewise.it] 
Sent: Tuesday, March 24, 2009 6:12 AM
To: mapserver-users
Subject: Re: [mapserver-users] Projection object parameters for UTM to lat-long


Bob,
maybe error is in first line: "ellps-GRS80" is wrong, "ellps=GRS80" is correct.
bye
................pg

Bistrais, Bob ha scritto: 

	I am trying to project an object from UTM to lat-long.  I cannot get the projection to work, and I suspect it's the parameters for the UTM projection object.  I am trying to project from UTM Zone 19N, NAD 1983 to lat-long.  Here is my code:

	$projInObj = ms_newprojectionobj("proj=utm,ellps-GRS80,datum=NAD83,zone=19,units=m,north,no_defs"); 
	$projOutObj = ms_newprojectionobj("proj=latlong"); 
	$poPoint = ms_newpointobj(); 
	$poPoint->setXY($xmin, $ymin); 
	echo "<p/>Coords: " . $poPoint->x . ",".$poPoint->y; 
	$poPoint = $poPoint->project($projInObj, $projOutObj); 
	echo "<p/>x = " . $poPoint->x; 
	echo "<p/>y = " . $poPoint->y; 
	$poPoint->free(); 

	I can see the output using the echo lines.  The coordinates going into the point show up and are correct, but there are no x/y values after doing the project.  Can anyone see what I'm doing wrong?

	
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-- 
Pietro Giannini
Bytewise srl - Area GIS
41°50'38.58"N 12°29'13.39"E
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