Re: Doubling of labels on high resolution maps

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Hi,=0A=0AThe best way is most likely to set up a WMTS service with mapcac=
he.=0AIt handles meta tiling in a more proper way.=0A=0AThere are good ex=
amples in the mapproxy documentation how to do labels in mapserver. =0Aht=
tps://mapproxy.org/docs/nightly/labeling.html (https://mapproxy.org/docs/=
nightly/labeling.html)=0AMapproxy is anotther good alternative instead of=
 mapcache.=0A=0ABe sure to specify "labelcache_map_edge_buffer" "-10" in =
the mapfile MAP-WEB data section.=0A=0AYou can still run WMS requests fro=
m QGIS towards mapcache if You have enabled that in the mapcache config.=
=0A=0A/Lars S.=0A17 oktober 2019 kl. 16:04, "Jan Hartmann" <j.l.h.hartman=
[email protected] (mailto:[email protected]?to=3D%22Jan%20Hartmann%22%20<j.l.h=
[email protected]>)> skrev:=0ANo, neither maxsize nor partials works. I gu=
ess that's just the way QGIS requests large WMS-images.=0A=0AThere is a "=
tile_metatile_level" configuration directive that should solve this probl=
em:=0A=0Ahttps://mapserver.org/output/tile_mode.html (https://mapserver.o=
rg/output/tile_mode.html)=0A=0Abut it does not seem to work for WMS layer=
s.=0A=0ASo I used the underlying PostGIS layer in QGIS, and that works OK=
, of course. Not sure if this is a bug in MapServer, though.=0A=0AThanks =
for your help,=0A=0AJan=0AOn 10/16/2019 5:55 PM, Rahkonen Jukka (MML) wro=
te: =0A	Hi, =0A=0A	Print composer is probably making tiled requests from =
WMS. That is compulsory for any bigger maps because the default maxsize o=
n the Mapserver side is 2048x2048 pixels https://mapserver.org/uk/mapfile=
/map.html (https://mapserver.org/uk/mapfile/map.html). It is easy to incr=
ease the maxsize but I do not know if print composer as a client can be a=
ware of that. =0A=0A	Partials FALSE may help, but based on the screenshot=
 it is possible that print composer is making requests with some overlap.=
  =0A=0A	-Jukka Rahkonen- =0A=0A	L=C3=A4hett=C3=A4j=C3=A4: mapserver-user=
s <[email protected]> (mailto:mapserver-users-bounc=
[email protected]) Puolesta Travis Kirstine=0AL=C3=A4hetetty: keskiviikk=
o 16. lokakuuta 2019 18.24=0AVastaanottaja: Jan Hartmann <j.l.h.hartmann@=
uva.nl> (mailto:[email protected])=0AKopio: MapServer-users <mapserve=
[email protected]> (mailto:[email protected])=0AAihe:=
 Re: [mapserver-users] Doubling of labels on high resolution maps =0A	The=
re are a few options you could add to your label but I would start with =
=0A	MINDISTANCE 200 =0A	PARTIALS FALSE =0A	See =0A	https://mapserver.org/=
mapfile/label.html (https://mapserver.org/mapfile/label.html) =0A	On Wed,=
 16 Oct 2019 at 10:37, Jan Hartmann <[email protected] (mailto:j.l.h.=
[email protected])> wrote:  =0A	Hi,=0A=0AI'm trying to generate high resolu=
tion print maps with QGIS, based on a MapServer WMS layer. When displayed=
 in the regular QGIS application with 72dpi, all looks fine. When using t=
he Print Composer based on the same Mapfile, but with 300dpi, some labels=
 are duplicated (not all). Some duplicates are clipped. The two versions =
can be seen here:=0A=0Ahttps://maps.hisgis.nl/marken_072dpi.png (https://=
maps.hisgis.nl/marken_072dpi.png)=0Ahttps://maps.hisgis.nl/marken_300dpi.=
png (https://maps.hisgis.nl/marken_300dpi.png)=0A=0ABelow the Mapfile. An=
y idea what goes wrong here?=0A=0AJan=0A=0Amap=0Aname Markegrenzen=0A=0Aw=
eb=0Ametadata=0A"wms_title" "Markegrenzen"=0A"wms_srs" "EPSG:28992 EPSG:3=
857"=0A"wms_extent" "13000 301000 279000 620000"=0A"wms_enable_request" "=
*"=0Aend=0Aend=0A=0Aextent 13000 301000 279000 620000=0Aunits meters=0Asi=
ze 400 400=0Aresolution 300=0Adefresolution 72=0Aprojection=0A"init=3Deps=
g:28992"=0Aend=0A=0Az=0Alayer=0Aname Markegrenzen=0Astatus on=0Atype poly=
gon=0Aconnectiontype postgis=0Aconnection "dbname=3Dov options=3D'-c sear=
ch_path=3Dhorigheid,public'"=0Adata " the_geom from (=0Aselect gid,the_ge=
om,naam from markegrenzen=0A) as foo using unique gid using srid=3D28992=
=0A"=0Alabelitem "naam"=0Aclass=0Astyle=0Aoutlinecolor 255 0 0=0Awidth 1=
=0Aend=0Alabel=0Acolor 255 0 0=0Asize 4=0Aend=0Aend=0Aend=0Aend =0A	_____=
__________________________________________=0Amapserver-users mailing list=
[email protected] (mailto:[email protected]=
g)=0Ahttps://lists.osgeo.org/mailman/listinfo/mapserver-users (https://li=
sts.osgeo.org/mailman/listinfo/mapserver-users)

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<!DOCTYPE html><html><head><meta http-equiv=3D"Content-Type" content=3D"t=
ext/html; charset=3Dutf-8" /></head><body><div data-html-editor-font-wrap=
per=3D"true" style=3D"font-family: arial, sans-serif; font-size: 13px;">H=
i,<br><br>The best way is most likely to set up a WMTS service with mapca=
che.<br>It handles meta tiling in a more proper way.<br><br>There are goo=
d examples in the mapproxy documentation how to do labels in mapserver. <=
br><a href=3D"https://mapproxy.org/docs/nightly/labeling.html">https://ma=
pproxy.org/docs/nightly/labeling.html</a><br>Mapproxy is anotther good al=
ternative instead of mapcache.<br><br>Be sure to specify "labelcache_map_=
edge_buffer" "-10" in the mapfile MAP-WEB data section.<br><br>You can st=
ill run WMS requests from QGIS towards mapcache if You have enabled that =
in the mapcache config.<br><br>/Lars S.<br><br><br>17 oktober 2019 kl. 16=
:04, "Jan Hartmann" &lt;<a target=3D"_blank" tabindex=3D"-1" href=3D"mail=
to:[email protected]?to=3D%22Jan%20Hartmann%22%20&lt;j.l.h.hartmann@u=
va.nl&gt;">[email protected]</a>&gt; skrev:<br> <blockquote><div><div=
 style=3D"color: #000000;background-color: #FFFFFF">No, neither maxsize n=
or partials works. I guess that's just the way QGIS requests large WMS-im=
ages.<br><br>There is a "tile_metatile_level" configuration directive tha=
t should solve this problem:<br><br><a rel=3D"external nofollow noopener =
noreferrer" target=3D"_blank" tabindex=3D"-1" href=3D"https://mapserver.o=
rg/output/tile_mode.html">https://mapserver.org/output/tile_mode.html</a>=
<br><br>but it does not seem to work for WMS layers.<br><br>So I used the=
 underlying PostGIS layer in QGIS, and that works OK, of course. Not sure=
 if this is a bug in MapServer, though.<br><br>Thanks for your help,<br><=
br>Jan<br> <div>On 10/16/2019 5:55 PM, Rahkonen Jukka (MML) wrote:</div> =
<blockquote type=3D"cite" cite=3D"mid:8322a18c6a834ff3addf1bc9bae56637@C1=
19S212VM042.msvyvi.vaha.local"><div> <p><span style=3D"mso-fareast-langua=
ge: EN-US">Hi,</span></p> <p><span style=3D"mso-fareast-language: EN-US" =
lang=3D"EN-US">Print composer is probably making tiled requests from WMS.=
 That is compulsory for any bigger maps because the default maxsize on th=
e Mapserver side is 2048x2048 pixels <a moz-do-not-send=3D"true" rel=3D"e=
xternal nofollow noopener noreferrer" target=3D"_blank" tabindex=3D"-1" h=
ref=3D"https://mapserver.org/uk/mapfile/map.html">https://mapserver.org/u=
k/mapfile/map.html</a>. It is easy to increase the maxsize but I do not k=
now if print composer as a client can be aware of that.</span></p> <p><sp=
an style=3D"mso-fareast-language: EN-US" lang=3D"EN-US">Partials FALSE ma=
y help, but based on the screenshot it is possible that print composer is=
 making requests with some overlap. </span></p> <p><span style=3D"mso-far=
east-language: EN-US" lang=3D"EN-US">-Jukka Rahkonen-</span></p> <p><b><s=
pan lang=3D"EN-US">L=C3=A4hett=C3=A4j=C3=A4:</span></b><span lang=3D"EN-U=
S"> mapserver-users <a rel=3D"external nofollow noopener noreferrer" targ=
et=3D"_blank" tabindex=3D"-1" href=3D"mailto:mapserver-users-bounces@list=
s.osgeo.org">&lt;[email protected]&gt;</a> <b>Puole=
sta </b>Travis Kirstine<br><b>L=C3=A4hetetty:</b> keskiviikko 16. lokakuu=
ta 2019 18.24<br><b>Vastaanottaja:</b> Jan Hartmann <a rel=3D"external no=
follow noopener noreferrer" target=3D"_blank" tabindex=3D"-1" href=3D"mai=
lto:[email protected]">&lt;[email protected]&gt;</a><br><b>Kopio:=
</b> MapServer-users <a rel=3D"external nofollow noopener noreferrer" tar=
get=3D"_blank" tabindex=3D"-1" href=3D"mailto:[email protected]=
.org">&lt;[email protected]&gt;</a><br><b>Aihe:</b> Re: [ma=
pserver-users] Doubling of labels on high resolution maps</span></p> <div=
> <div><p>There are a few options you could add to your label but I would=
 start with</p></div> <div></div> <div><p>MINDISTANCE 200</p></div> <div>=
<p>PARTIALS FALSE</p></div> <div></div> <div><p>See</p></div> <div><p><a =
moz-do-not-send=3D"true" rel=3D"external nofollow noopener noreferrer" ta=
rget=3D"_blank" tabindex=3D"-1" href=3D"https://mapserver.org/mapfile/lab=
el.html">https://mapserver.org/mapfile/label.html</a></p></div> <div></di=
v> <div></div> </div> <div> <div><p>On Wed, 16 Oct 2019 at 10:37, Jan Har=
tmann &lt;<a moz-do-not-send=3D"true" rel=3D"external nofollow noopener n=
oreferrer" target=3D"_blank" tabindex=3D"-1" href=3D"mailto:j.l.h.hartman=
[email protected]">[email protected]</a>&gt; wrote:</p></div> <blockquote styl=
e=3D"border: none;border-left: solid #CCCCCC 1.0pt;padding: 0cm 0cm 0cm 6=
.0pt;margin-left: 4.8pt;margin-right: 0cm"> <div><div><p style=3D"margin-=
bottom: 12.0pt"><span style=3D'font-size: 10.5pt;font-family: "Courier Ne=
w"'>Hi,<br><br>I'm trying to generate high resolution print maps with QGI=
S, based on a MapServer WMS layer. When displayed in the regular QGIS app=
lication with 72dpi, all looks fine. When using the Print Composer based =
on the same Mapfile, but with 300dpi, some labels are duplicated (not all=
). Some duplicates are clipped. The two versions can be seen here:<br><br=
><a target=3D"_blank" moz-do-not-send=3D"true" rel=3D"external nofollow n=
oopener noreferrer" tabindex=3D"-1" href=3D"https://maps.hisgis.nl/marken=
_072dpi.png">https://maps.hisgis.nl/marken_072dpi.png</a><br><a target=3D=
"_blank" moz-do-not-send=3D"true" rel=3D"external nofollow noopener noref=
errer" tabindex=3D"-1" href=3D"https://maps.hisgis.nl/marken_300dpi.png">=
https://maps.hisgis.nl/marken_300dpi.png</a><br><br>Below the Mapfile. An=
y idea what goes wrong here?<br><br>Jan<br><br>map<br>name Markegrenzen<b=
r><br>web<br>metadata<br>"wms_title" "Markegrenzen"<br>"wms_srs" "EPSG:28=
992 EPSG:3857"<br>"wms_extent" "13000 301000 279000 620000"<br>"wms_enabl=
e_request" "*"<br>end<br>end<br><br>extent 13000 301000 279000 620000<br>=
units meters<br>size 400 400<br>resolution 300<br>defresolution 72<br><br=
><br>projection<br>"init=3Depsg:28992"<br>end<br><br>z<br>layer<br>name M=
arkegrenzen<br>status on<br>type polygon<br>connectiontype postgis<br>con=
nection "dbname=3Dov options=3D'-c search_path=3Dhorigheid,public'"<br>da=
ta " the_geom from (<br>select gid,the_geom,naam from markegrenzen<br>) a=
s foo using unique gid using srid=3D28992<br>"<br>labelitem "naam"<br>cla=
ss<br>style<br>outlinecolor 255 0 0<br>width 1<br>end<br>label<br>color 2=
55 0 0<br>size 4<br>end<br>end<br>end<br>end </span><br> </p></div></div>=
 <p>_______________________________________________<br>mapserver-users ma=
iling list<br><a target=3D"_blank" moz-do-not-send=3D"true" rel=3D"extern=
al nofollow noopener noreferrer" tabindex=3D"-1" href=3D"mailto:mapserver=
[email protected]">[email protected]</a><br><a target=
=3D"_blank" moz-do-not-send=3D"true" rel=3D"external nofollow noopener no=
referrer" tabindex=3D"-1" href=3D"https://lists.osgeo.org/mailman/listinf=
o/mapserver-users">https://lists.osgeo.org/mailman/listinfo/mapserver-use=
rs</a></p> </blockquote> </div> </div></blockquote> </div></div></blockqu=
ote> <br><br><signature></signature> </div></body></html>

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