[mapserver-users] Why $map->scaledenom returns -1 ?
Lime, Steve D (MNIT)
Steve.Lime at state.mn.us
Fri Jun 20 09:26:12 PDT 2014
One more thing is needed to compute scale: map units. Try setting that in your mapfile (e.g. UNITS METERS), then make sure you set a proper map extent and map size via PHP and things should work.
Steve
From: mapserver-users-bounces at lists.osgeo.org [mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of Vladimir
Sent: Thursday, June 19, 2014 3:17 AM
To: mapserver-users
Subject: Re: [mapserver-users] Why $map->scaledenom returns -1 ?
Hi Steve
Yes it is WMS request from OL3:
http://localhost/map,php?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&FORMAT=image%2Fpng&TRANSPARENT=true&LAYERS=rayon&CRS=EPSG%3A3857&STYLES=&MAP_RESOLUTION=135&WIDTH=2025&HEIGHT=1125&BBOX=1950071.7561607715%2C1681030.6423115395%2C15158390.243839229%2C9018985.35768846
I considered MapServer captures width, height and extent from GetMap request parameters.
But either
$request->loadparams()
or
foreach ($_GET as $key => $value)
{
$request->setparameter($key, $value);
}
don't calculate them and scaledenom=-1 as result.
Is there another unknown method for me?
Now this works only with additional extracting from $_GET:
foreach ($_GET as $key => $value)
{
$request->setparameter($key, $value);
}
if(!empty($_GET['BBOX']) && !empty($_GET['WIDTH']) && !empty($_GET['HEIGHT']))
{
$extentArray=explode(',',$_GET['BBOX']);
$minX=$extentArray[0];
$minY=$extentArray[1];
$maxX=$extentArray[2];
$maxY=$extentArray[3];
$width=(int)$_GET['WIDTH'];
$height=(int)$_GET['HEIGHT'];
$map->setSize($width,$height);
$map->setExtent($minX,$minY,$maxX,$maxY);
$map->preparequery();
$scale=$map->scaledenom;
}
Can't understand what's wrong. Any idea ?
Best regards
Vladimir
Tue, 17 Jun 2014 14:29:53 +0000 от "Lime, Steve D (MNIT)" <Steve.Lime at state.mn.us<mailto:Steve.Lime at state.mn.us>>:
This is a WMS request? I’d think MapServer would populate width, height and extent for you. What are the values for those parameters if you don’t set them explicitly?
Steve
From: mapserver-users-bounces at lists.osgeo.org<mailto:mapserver-users-bounces at lists.osgeo.org> [mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of Vladimir
Sent: Tuesday, June 17, 2014 6:57 AM
To: mapserver-users
Subject: Re: [mapserver-users] Why $map->scaledenom returns -1 ?
Hello Steve.
Thank you very much for the thought.
I use OpenLayers 3 on client side whose query string contains:
&WIDTH=2025&HEIGHT=1125&BBOX=5252151,2C3515519,11856310613,7184496
and futher scaledenom is computed:
$extentArray=explode(',',$_GET['BBOX']);
$minX=$extentArray[0];
$minY=$extentArray[1];
$maxX=$extentArray[2];
$maxY=$extentArray[3];
$width=(int)$_GET['WIDTH'];
$height=(int)$_GET['HEIGHT'];
$map->setExtent($minX,$minY,$maxX,$maxY);
$map->setSize($width,$height);
$map->preparequery();
$scale=$map->scaledenom;
It works for me, but I am not sure that is standard method.
Can this be used?
Best regards
Vladimir
16 2014, 15:43 UTC от "Lime, Steve D (MNIT)" <Steve.Lime at state.mn.us<//e.mail.ru/compose/?mailto=mailto%3aSteve.Lime at state.mn.us>>:
Scale can only be computed if there is a map extent and map size set. Are you doing so?
Steve
From: mapserver-users-bounces at lists.osgeo.org<//e.mail.ru/compose/?mailto=mailto%3amapserver%2dusers%2dbounces at lists.osgeo.org> [mailto:mapserver-users-bounces at lists.osgeo.org<//e.mail.ru/compose/?mailto=mailto%3amapserver%2dusers%2dbounces at lists.osgeo.org>] On Behalf Of Vladimir
Sent: Monday, June 16, 2014 1:12 AM
To: mapserver-users
Subject: [mapserver-users] Why $map->scaledenom returns -1 ?
Hello list
I stuck on the scaledenom definition in my PHPMapScript v. 6.4.1.
The current scaledenom required to embed in SQL-statement, but
$map->scaledenom returns -1. Tons of googling got nothing. Please help!
phpscript.php ---------------------------------------------------------------------------------------------
$map = ms_newMapobj("/srv/www/htdocs/tez/design/mapfile.map");
$request = ms_newOwsrequestObj();
if(!empty($_GET)){
foreach ($_GET as $key => $value) {
$request->setparameter($key, $value);
}
}
$map->preparequery();
$map->scaledenom;//returns -1
$rayonLayer = $map->getLayerByName("rayon");
$rayonLayer->set("data","geom from (select id, name, geom from location
where ST_Intersects(geom, !BOX!)) as subquery using unique id using srid=3857");
ms_ioinstallstdouttobuffer();
$map->owsDispatch($request);
$contenttype = ms_iostripstdoutbuffercontenttype();
header('Content-type:'.$contenttype);
ms_iogetStdoutBufferBytes();
ms_ioresethandlers();
mapfile.map---------------------------------------------------------------------------------------------
MAP
NAME "Map"
OUTPUTFORMAT
NAME 'AGG'
DRIVER AGG/PNG
IMAGEMODE RGB
END #OUTPUTFORMAT
STATUS ON
FONTSET "fonts/fonts.list"
CONFIG "PROJ_LIB" "/usr/lib/proj/"
WEB
METADATA
wms_title "Map"
wms_abstract "Map"
wms_onlineresource "http://localhost/phpscript.php"
wms_srs "EPSG:3857"
wms_enable_request "*"
wms_encoding "utf-8"
END # end METADATA
END # end WEB
PROJECTION
"init=epsg:3857"
END # end PROJECTION
LAYER
NAME "rayon"
STATUS ON
CONNECTIONTYPE postgis
CONNECTION "user=ms_viewer password=1 dbname=ms_db host=localhost"
TYPE POLYGON
LABELITEM "name"
CLASS
NAME "rayons"
STYLE
OUTLINECOLOR 255 0 0
OUTLINEWIDTH 5
END # end STYLE
END # end CLASS
PROJECTION
"init=epsg:3857"
END # end PROJECTION
METADATA
wms_title "rayon"
wms_abstract "rayon"
wms_srs "EPSG:3857"
wms_include_items "all"
END # end METADATA
END # end LAYER
END # end MAP
---------------------------------------------------------------------------------------------
Best regards
--
Vladimir
________________________________
--
Vladimir
--
Vladimir
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