[mapserver-users] Zooming Problems (FWD)

[teb]

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From: "Joseph Archibald" <joea at archtech.ca>
To: <mapserver-info at lists.gis.umn.edu>
Subject: Zooming Problems
Date: Mon, 7 Jan 2002 10:11:33 -0500
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Hi

I am having a problem with zooming.  I had to reinstall the 
server after a hard drive crash and since then, I haven't been 
able to get the zoom in function to work.
I orginally wrote the code for mapscript 3.3 using IIS and PHP 
4.04 on Windows 2000.

I am currently still using Windows 2000 and PHP 4.0.6 and

MapScript Version (Aug 29, 2001)
MapServer version 3.5 (pre-alpha) OUTPUT=GIF OUTPUT=PNG 
OUTPUT=JPEG OUTPUT=WBMP SUPPORTS=PROJ SUPPORTS=TTF SUPPORTS=WMS 
INPUT=EPPL7 INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE

I have tried the gmap demo and it works fine.

I am using the standard gmap75.php3, with the check for layers 
removed, to see if it was any of the changes that I did to this 
file.

My program creates a full view of the area with the extents:

480133,4732449,488288,4740088

The information passed to:

$gpoMap->zoomrectangle($oPixelRect, $dfWidthPix, $dfHeightPix, 
$oGeorefExt);

Before the zoom command
zooming to: 198, 172
                   210, 156    (PixelRect)
width: 400,   height: 300
Geo Coord: 480133, 4732449, 488288, 4740088

Extent minx VALUE="480133.000000" miny VALUE="4732449.000000" 
maxx VALUE="488288.000000" maxy VALUE="4740088.000000" 

after zoom: 198, 172
                  210, 156
width: 400, height: 300
Geo Coord: 480133, 4732449, 488288, 4740088

Extent minx VALUE="296614.373568" miny VALUE="4595153.756009" 
maxx VALUE="671969.726432" maxy VALUE="4876670.270657" 


This takes my zoom from a 5km area to 195km area.

I have tried this with TAB files and ShapeFiles, with the same 
result.

I am not sure if it is a bug with mapscript, or PHP, because I 
can get the demo working, I believe that it is something in 
either my .MAP file or my main program that is calling on 
gmap75.php.

Any help would be appreciated.



Joseph Archibald
Archtech Computers/National Amiga
502  Adelaide St N
London, Ont.  N6B 3J2
ph: 519 858-8760
fax: 519 858-8762

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