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Hi,<br>
<br>
This seems to be a matter of feature namespace. In OpenLayers,
XML is read using the namespaces of a node as the way to detect the
according reader for it. If not set in the protocol, OpenLayers
sets "feature" as default prefix for feature nodes. In MapServer,
the default value outputed in the GML is "ms" as you can see in
yours. You can either adjust OpenLayers to your MapServer settings
[1] or the opposite [2] in order to read the nodes accordingly.<br>
<br>
[1] set feature prefix and namespace in your protocol (OpenLayers)
according to MapServer settings<br>
<br>
protocol: new OpenLayers.Protocol.WFS({<br>
url: mapPath,<br>
featureType: "tenszones",<br>
featurePrefix: "ms",<br>
featureNS: "<a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="http://mapserver.gis.umn.edu/mapserver">http://mapserver.gis.umn.edu/mapserver</a>"<br>
}),<br>
<br>
[2] or set your feature namespace to OpenLayers default value in
your mapfile (in your MAP, METADATA tag):<br>
<br>
"wfs_namespace_prefix" "feature"<br>
"wfs_namespace_uri" <a class="moz-txt-link-rfc2396E" href="http://localhost">"http://localhost"</a><br>
<br>
Before making any changes, you could use firebug with an
uncompressed version of OpenLayers (2.10) and set a breakpoint in
./lib/OpenLayers/Format/XML.js on line 621 :<br>
var group = this.readers[node.namespaceURI ?
this.namespaceAlias[node.namespaceURI]: this.defaultPrefix];<br>
<br>
Inspect the elements there until you reach your node that doesn't
get read properly and you'll see why it isn't and how it works as
well.<br>
<br>
HTH,<br>
<br>
Alexandre<br>
<br>
<br>
On 11-06-08 11:12 AM, Mark K. Zanfardino wrote:
<blockquote cite="mid:4DEF9172.4030800@gmail.com" type="cite">
<meta http-equiv="content-type" content="text/html;
charset=ISO-8859-1">
OpenLayers version 2.10 <br>
MapServer version 5.6.6 <br>
<br>
Goal: Render vector layer based on WFS protocol<br>
<br>
I'm trying to understand why a vector layer will not render on my
map. I can clearly see the layer in the layerSwitcher control so I
presume the layer is being presented, but there are no actual
features rendered.<br>
<br>
The vector layer is defined using a WFS protocol:<br>
<blockquote>tens = new OpenLayers.Layer.Vector("TENS", <br>
{<br>
strategies: [new OpenLayers.Strategy.BBOX()],<br>
protocol: new OpenLayers.Protocol.WFS({<br>
url: mapPath,<br>
featureType: "tenszones",<br>
}),<br>
styleMap: new OpenLayers.StyleMap({<br>
strokeWidth: 3,<br>
strokeColor: "#333333"<br>
}),<br>
filter: new OpenLayers.Filter.Logical({<br>
type: OpenLayers.Filter.Logical.NOT,<br>
filters: [<br>
new OpenLayers.Filter.Comparison({<br>
type: OpenLayers.Filter.Comparison.EQUAL_TO,<br>
property: "name",<br>
value: "County0"<br>
})<br>
]<br>
})<br>
},<br>
{<br>
isBaseLayer: false,<br>
buffer: 0<br>
}<br>
);<br>
</blockquote>
When I watch the page load I can clearly see the XML results from
the WFS call (see XML output) but no features are rendered on the
map. I'm following from the 'WFS Protocol and Filter' example. Any
help would be appreciated.<br>
<br>
<?xml version='1.0' encoding="ISO-8859-1" ?><br>
<wfs:FeatureCollection<br>
xmlns:ms=<a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="http://mapserver.gis.umn.edu/mapserver">"http://mapserver.gis.umn.edu/mapserver"</a><br>
xmlns:wfs=<a moz-do-not-send="true"
class="moz-txt-link-rfc2396E" href="http://www.opengis.net/wfs">"http://www.opengis.net/wfs"</a><br>
xmlns:gml=<a moz-do-not-send="true"
class="moz-txt-link-rfc2396E" href="http://www.opengis.net/gml">"http://www.opengis.net/gml"</a><br>
xmlns:ogc=<a moz-do-not-send="true"
class="moz-txt-link-rfc2396E" href="http://www.opengis.net/ogc">"http://www.opengis.net/ogc"</a><br>
xmlns:xsi=<a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="http://www.w3.org/2001/XMLSchema-instance">"http://www.w3.org/2001/XMLSchema-instance"</a><br>
xsi:schemaLocation="<a moz-do-not-send="true"
class="moz-txt-link-freetext" href="http://www.opengis.net/wfs">http://www.opengis.net/wfs</a>
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://schemas.opengis.net/wfs/1.0.0/WFS-basic.xsd">http://schemas.opengis.net/wfs/1.0.0/WFS-basic.xsd</a>
<br>
<a moz-do-not-send="true"
class="moz-txt-link-freetext"
href="http://mapserver.gis.umn.edu/mapserver">http://mapserver.gis.umn.edu/mapserver</a>
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://localhost/cgi-bin/mapserv?map=/home/mark/htdocs/sandbox/contra_costa/mapdata/cws.map&amp;SERVICE=WFS&amp;VERSION=1.0.0&amp;REQUEST=DescribeFeatureType&amp;TYPENAME=tenszones&amp;OUTPUTFORMAT=XMLSCHEMA">http://localhost/cgi-bin/mapserv?map=/home/mark/htdocs/sandbox/contra_costa/mapdata/cws.map&amp;SERVICE=WFS&amp;VERSION=1.0.0&amp;REQUEST=DescribeFeatureType&amp;TYPENAME=tenszones&amp;OUTPUTFORMAT=XMLSCHEMA</a>"><br>
<gml:boundedBy><br>
<gml:Box srsName="EPSG:4326"><br>
<gml:coordinates>-122.430673,37.902872
-121.783758,38.058186</gml:coordinates><br>
</gml:Box><br>
</gml:boundedBy><br>
<gml:featureMember><br>
<ms:tenszones fid="tenszones.2"><br>
<gml:boundedBy><br>
<gml:Box srsName="EPSG:4326"><br>
<gml:coordinates>-121.882119,38.004151
-121.822493,38.034986</gml:coordinates><br>
</gml:Box><br>
</gml:boundedBy><br>
<ms:msGeometry><br>
<gml:Polygon srsName="EPSG:4326"><br>
<gml:outerBoundaryIs><br>
<gml:LinearRing><br>
<gml:coordinates>-121.826546,38.024671
-121.825545,38.018151 -121.822493,38.015989 -121.832033,38.004151
-121.847393,38.007365 -121.876296,38.018261 -121.875579,38.022347
-121.882119,38.024341 -121.880209,38.032456 -121.878309,38.034986
-121.826546,38.024671 </gml:coordinates><br>
</gml:LinearRing><br>
</gml:outerBoundaryIs><br>
</gml:Polygon><br>
</ms:msGeometry><br>
<ms:gid>2</ms:gid><br>
<ms:area>0.00104289122555201</ms:area><br>
<ms:perimeter>0.147388060113902</ms:perimeter><br>
<ms:name>DOW0</ms:name><br>
</ms:tenszones><br>
</gml:featureMember><br>
<gml:featureMember><br>
<ms:tenszones fid="tenszones.3"><br>
<gml:boundedBy><br>
<gml:Box srsName="EPSG:4326"><br>
<gml:coordinates>-121.837932,37.999340
-121.819430,38.024672</gml:coordinates><br>
</gml:Box><br>
</gml:boundedBy><br>
<ms:msGeometry><br>
<gml:Polygon srsName="EPSG:4326"><br>
<gml:outerBoundaryIs><br>
<gml:LinearRing><br>
<gml:coordinates>-121.826535,38.024672
-121.819800,38.022000 -121.819430,38.004870 -121.821310,37.999340
-121.837932,38.003598 -121.836350,38.005070 -121.832027,38.004150
-121.822495,38.015991 -121.825510,38.018100 -121.826535,38.024672
</gml:coordinates><br>
</gml:LinearRing><br>
</gml:outerBoundaryIs><br>
</gml:Polygon><br>
</ms:msGeometry><br>
<ms:gid>3</ms:gid><br>
<ms:area>0.000183226789886248</ms:area><br>
<ms:perimeter>0.0794914873797834</ms:perimeter><br>
<ms:name>DOW1</ms:name><br>
</ms:tenszones><br>
</gml:featureMember><br>
</wfs:FeatureCollection>
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</blockquote>
<br>
<br>
<pre class="moz-signature" cols="72">--
Alexandre Dubé
Mapgears
<a class="moz-txt-link-abbreviated" href="http://www.mapgears.com">www.mapgears.com</a>
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