I'm making some progress with this:
I've set it up as:
wfsProtocol[i] = new OpenLayers.Protocol.Script({
url: lay.spatialQuery[0].url,
callbackKey: "format_options",
callbackPrefix: "callback:",
params: {
service: "WFS",
version: "1.1.0",
srsName: (projstr=="EPSG:900913" &&
(lay.serverUrl.search(/arcgis/)>=0)) ? "EPSG:102113" : projstr,
request: "GetFeature",
featurePrefix: lay.spatialQuery[0].featurePrefix,
typeName: lay.spatialQuery[0].featureType,
outputFormat: "json"
},
filterToParams: function(filter, params) {
// example to demonstrate BBOX serialization
if (filter.type ===
OpenLayers.Filter.Spatial.BBOX) {
params.bbox = filter.value.toArray();
if (filter.projection) {
params.bbox.push(filter.projection.getCode());
}
} else if (filter.type ===
OpenLayers.Filter.Spatial.DWITHIN) {
params.cql_filter = 'DWITHIN(SHAPE,' +
filter.value.toString() + ',' + filter.distance + ',' +
filter.distanceUnits + ')';
} else if (filter.type ===
OpenLayers.Filter.Spatial.INTERSECTS) {
params.cql_filter = 'INTERSECTS(SHAPE,' +
filter.value.toString() + ')';
}
return params;
}
})
However, the cql_filter approach to serializing the filter isnt working.
Get empty feature set no matter what filter.distance is set to. Is there
a better way to set up filters for GET?
--
Phil Scadden, Senior Scientist GNS Science Ltd 764 Cumberland St,
Private Bag 1930, Dunedin, New Zealand Ph +64 3 4799663, fax +64 3 477 5232
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