[mapguide-users] Dynamically creating a line layer with SDF Feature Source

[uXuf]

Hi Jackie,

I am getting a little confused by all this. I am actually trying to
dynamically add a copy of a layer that already exists in the map. You see, I
already have a layer from the "Arteries.FeatureSource" in my map. I just
want to check out how dynamically created layers can be added.

So I just copied the FeatureClass and Geometry from the layer in the Studio,
and I also referred to the devguide Hydrography example. Still I have no
clue.

Could anyone take out a little time and explain it to me?

Regards,
uXuf




Jackie Ng wrote:
> 
> Just looking at your code...
> 
> Validation is failing because the $featureName should be an enumerated
> value ( "FeatureClass" or "NamedExtension" )
> 
> The value of $featureClass should actually be the resourceid of the layer
> definition xml document. The current value should be the current value of
> $featureName (ie. $featureClass = "SDF_2_Schema:Selected")
> 
> - Jackie
> 
> 
> uXuf wrote:
>> 
>> Hi all,
>> 
>> I am trying to add a layer of lines to my map using an existing
>> FeatureSource in the library. This FeatureSource was generated from an
>> SDF (created by Map 3D). I want to create the layer using the
>> LayerDefinitionFactory instead of the usual XML file way. 
>> 
>> However, I get a "The new XML document is invalid" error when I try to
>> use the add_layer_definition_to_map() function of the
>> LayerDefinitionFactory.php. Inspecting this problem it turns out that the
>> layer definition that (I think) I am sending with the code is failing to
>> validate with the LayerDefinition-1.0.0.xsd. I haven't touched the XSD
>> file at all since installation. Probably this error could lie when I am
>> creating my geometry, I checked in the examples and consistently it was
>> specified as "SHPGEOM", however when I check it out in Studio by creating
>> a temporary layer from the feature source it is specified as "Data". I
>> have also checked by specifying geometry as "Data". The error remains so.
>> 
>> Another thing I am getting confused in is to provide the Feature Name. I
>> provide it with the value of "SDF_2_Schema:Selected", but I am not sure
>> whether I should use "SHP_Schema:Selected". Any pointers in this regard
>> would be greatly welcomed.
>> 
>> Here is the relevant part of my code:
>> 
>> //Set up a temporary layer
>> $factory = new LayerDefinitionFactory();
>> $legendLabel = '';
>> $filter = '';
>> $color = 'FF0000FF';
>> $lineRule = $factory->CreateLineRule($legendLabel, $filter, $color);
>> $lineTypeStyle = $factory->CreateLineTypeStyle($lineRule);
>> $minScale = '0';
>> $maxScale = '1000000';
>> $lineScaleRange = $factory->CreateScaleRange($minScale, $maxScale,
>> $lineTypeStyle);
>> 
>> //The following FeatureSource is generated from and SDF
>> $featureClass = "Library://akMaps/Data/Arteries.FeatureSource";
>> 
>> //Could this be the real culprit?
>> $featureName = "SDF_2_Schema:Selected";
>> 
>> //Or this?
>> $geometry = 'Data';
>> $layerDefinition = $factory->CreateLayerDefinition($featureClass,
>> $featureName, $geometry, $lineScaleRange);
>> 
>> //error occurs in this function, fails to validate with
>> LayerDefinition.xsd
>> $newLayer = add_layer_definition_to_map($layerDefinition, "Selected",
>> "Selected", $mgSessionID, $resourceService, $map);
>> 
>> 
>> Any help would be greatly appreciated.
>> 
>> Thanks in advance,
>> uXuf
>> 
>> 
> 
> 

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