Negative values in extent

[Ed McNierney]

Miroslav -

Your EXTENT statement has a maximum Y value (-1046000) that is smaller than the minimum Y value (-1043200).  Negative values are fine, but MINY must be less than MAXY.

        - Ed

Ed McNierney
President and Chief Mapmaker
TopoZone.com / Maps a la carte, Inc.
73 Princeton Street, Suite 305
North Chelmsford, MA  01863
Phone: +1 978 251-4242   Fax: +1 978 251-1396  

-----Original Message-----
From: UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On Behalf Of Miroslav Šulc
Sent: Tuesday, December 14, 2004 9:32 AM
To: MAPSERVER-USERS at LISTS.UMN.EDU
Subject: [UMN_MAPSERVER-USERS] Negative values in extent

Hi,

I have upgraded to mapserver 4.4.0 and I am having problem with negative values in EXTENT in MAP file. I have maps in S-JTSK (Czech norm) and this is a system with negative values. Here is my EXTENT:

EXTENT -747200 -1043200 -747000 -1046000

These worked for me when I used the mapserver script. But I cannot make them work throught the php mapscript. Thought I finally "succeeded"
(they appear in the $map->extent till next method is called) to get the negative extent to the map object, I still get error that the map cannot be drawn.

Info: object(ms_rect_obj)#46 (5) { ["_handle_"]=> resource(361) of type
(Unknown) ["minx"]=> int(-747200) ["miny"]=> int(-1043200) ["maxx"]=>
int(-747000) ["maxy"]=> int(-1046000) }

*Warning*: [MapServer Error]: msDrawMap(): Unable to initialize image.
in
*/var/www/intranet.centaur.startnet.cz/htdocs/modules/maps/CMap.cls.php*
on line *106*

*Warning*: [MapServer Error]: msCalculateScale(): Invalid image extent, minx=-1.000000, miny=-1.000000, maxx=-1.000000, maxy=-1.000000. in
*/var/www/intranet.centaur.startnet.cz/htdocs/modules/maps/CMap.cls.php*
on line *106*

Here is my code (it's copied from the hello example):

        $map = ms_newMapObj($this->m_Row['MapFilePath']);
        $extent = ms_newRectObj();
        $extent->minx = -747200;
        $extent->miny = -1043200;
        $extent->maxx = -747000;
        $extent->maxy = -1046000;
        $map->extent = $extent;
        $image = $map->draw();
        $map_file = $image->saveWebImage();

Does Mapserver support negative values in extent? If not, is there any workaround? I will appreciate any suggestion.

--
Miroslav Šulc, CEO
StartNet s.r.o.
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