<!DOCTYPE html><html><head><title></title><style type="text/css">p.MsoNormal,p.MsoNoSpacing{margin:0}</style></head><body><div>Hi,<br></div><div><br></div><div>Is there any change if you update the layer to have a single class with a simple line (no EXPRESSION, LABEL, MAXSCALEDENOM)?<br></div><div><br></div><div>E.g.<br></div><div><br></div><div> CLASS<br></div><div> STYLE<br></div><div> COLOR 0 0 255<br></div><div> WIDTH 6<br></div><div> END<br></div><div><br></div><div>Seth<br></div><div><br></div><div id="sig62266145"><div class="signature">--<br></div><div class="signature">web:<a href="https://geographika.net">https://geographika.net</a><br></div><div class="signature">twitter: @geographika<br></div></div><div><br></div><div>On Wed, Sep 28, 2022, at 1:03 PM, Antonis Christofides wrote:<br></div><blockquote type="cite" id="qt" style=""><p>Hello,<br></p><p>I have a problem that has already been discussed in stackexchange
(<a class="qt-moz-txt-link-freetext" href="https://gis.stackexchange.com/questions/440902/mapserver-wms-not-all-features-show-depending-on-how-i-zoom-and-pan">https://gis.stackexchange.com/questions/440902/mapserver-wms-not-all-features-show-depending-on-how-i-zoom-and-pan</a>),
but without solution so far.<br></p><p>I'm repeating the full text here, but if there's any problem with
the images it might be better to go to stackexchange to read it.<br></p><p>Here is how QGIS shows an irrigation network, received by
MapServer via WMS and superimposed on OpenStreetMap:<br></p><p><img src="https://i.stack.imgur.com/bCOib.png" alt="enter image
description here"><br></p><p>Here is the same thing, but slightly panned to the right:<br></p><p><img src="https://i.stack.imgur.com/Ca7Tc.png" alt="enter image
description here"><br></p><p>Several items are obviously missing. In fact there are items
missing in the top picture as well. Different items become visible
as I zoom and pan differently.<br></p><p>Since this pretty much tells the whole story, I'm not going into
more details. MapServer version is 7.6.2 (prepackaged for Debian).
The base URL is <a class="qt-moz-txt-link-freetext" href="https://poros.irmasys.com/cgi-bin/mapserv?map=/opt/aira-poros/aira-poros/mapserver/extralayers.map">https://poros.irmasys.com/cgi-bin/mapserv?map=/opt/aira-poros/aira-poros/mapserver/extralayers.map</a>.
Finally, below I paste the interesting parts of the mapfile.<br></p><p>Thanks!<br></p><p>Antonis<br></p><p><br></p><p><br></p><div><br></div><pre><code>MAP
NAME "aira-poros"
STATUS ON
SIZE 9040 7731
EXTENT 103986.57 3850796.18 1007945.14 4623933.00
UNITS meters
PROJECTION
"init=epsg:2100"
END
CONFIG MS_ERRORFILE "/var/log/mapserver/extralayers.log"
# [Omitting some OUTPUTFORMAT sections]
WEB
IMAGEPATH "/var/cache/mapserver/"
IMAGEURL "/mapserver_tmp/"
METADATA
"wms_title" "Aira Poros"
"wms_onlineresource" <a class="qt-moz-txt-link-rfc2396E" href="https://poros.irmasys.com/cgi-bin/mapserv?map=/opt/aira-poros/aira-poros/mapserver/extralayers.map&">"https://poros.irmasys.com/cgi-bin/mapserv?map=/opt/aira-poros/aira-poros/mapserver/extralayers.map&"</a>
"wms_srs" "EPSG:4326 EPSG:2100 EPSG:3857"
"wms_enable_request" "*"
"wms_feature_info_mime_type" "text/html"
"wfs_title" "Aira Poros"
"wfs_onlineresource" <a class="qt-moz-txt-link-rfc2396E" href="https://poros.irmasys.com/cgi-bin/mapserv?map=/opt/aira-poros/aira-poros/mapserver/extralayers.map&">"https://poros.irmasys.com/cgi-bin/mapserv?map=/opt/aira-poros/aira-poros/mapserver/extralayers.map&"</a>
"wfs_srs" "EPSG:2100 EPSG:4326 EPSG:3857"
"wfs_enable_request" "*"
END
END
LAYER
NAME "irrigation-network"
TYPE LINE
CONNECTIONTYPE OGR
CONNECTION "irrigation-network.gml"
METADATA
"wms_title" "Irrigation network"
"wfs_title" "Irrigation network"
"gml_include_items" "all"
"gml_featureid" "id"
END
STATUS ON
PROJECTION
"init=epsg:2100"
END
CLASSITEM 'category'
CLASS
EXPRESSION '1'
STYLE
COLOR 0 0 255
OPACITY 50
WIDTH 6
END
LABEL
COLOR 0 0 255
ANGLE FOLLOW
OFFSET 5 99
MAXSCALEDENOM 10000
TEXT "[irri_code]"
END
LABEL
COLOR 0 0 255
ANGLE FOLLOW
OFFSET -8 99
MAXSCALEDENOM 10000
EXPRESSION (NOT('[Diameter]' = ''))
TEXT "D=[Diameter] mm"
END
END
# [Omitting three more classes]
END
# [Omitting four more layers]
END</code><br></pre><div>_______________________________________________<br></div><div>MapServer-users mailing list<br></div><div><a href="mailto:MapServer-users@lists.osgeo.org">MapServer-users@lists.osgeo.org</a><br></div><div><a href="https://lists.osgeo.org/mailman/listinfo/mapserver-users">https://lists.osgeo.org/mailman/listinfo/mapserver-users</a><br></div><div><br></div></blockquote><div><br></div></body></html>