Negative values in extent

[Paul Spencer]

http://mapserver.gis.umn.edu/bugs/show_bug.cgi?id=937

I've requested that Steve change the error message to actually tell the
user what is wrong (i.e. extents are invalid because miny > maxy or minx
 > maxx

Paul

Ed McNierney wrote:
> 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.
> ----------------------------------------------------
> Vrchlického 161/5, Praha 5, 150 00, Česká republika
> ----------------------------------------------------
> ICQ: 60144073
> web: www.startnet.cz, www.novavystavba.cz
> ----------------------------------------------------
> mobil: +420 603 711 413
> telefon: +420 257 225 602
> ----------------------------------------------------
>
>

--
+-----------------------------------------------------------------+
|Paul Spencer                           pspencer at dmsolutions.ca   |
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|Applications & Software Development                              |
|DM Solutions Group Inc                 http://www.dmsolutions.ca/|
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