SetLayerDefinition - By Geometry
I'm looking to define my layer definition by attributes and geometry , does anybody know if this is possible. I'm successful in doing this with a query task but the output is a FeatureSet.
I need to filter the Layer by Geometry instead of using a FeatureSet because I need my symbology of my layer which doesn't carry over to the FeatureSet created from a query task.
-Alex
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is it possible to set layer definition using "geometry" ? Has anyone done this successfully?
I'm looking to display point features within a user defined area.
- User selects area using "Display Geometry Capture"
- Set the visibility of the map service and layer to True using "Set Layer" and "Set MapService" visibility.
- And then use "Set Layer Definition" to display the points with the user defined area......but how to I fill in the "definition"?
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I did this the following way
- Query task activity with a administrative and spatial selection (Where and Geometry properties)
- Get Object IDs activity to get the OIDs
- Create a where clause from the OIDs with an Assign activity: string.Format("OBJECTID IN ({0})",String.Join(",", CType(oids, IList(Of int32)).Select(Function(value) value.ToString )))
- Set layer definition with with the where clause as definition
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Thx Nico...I'll definitely try this out.
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Hi All, i'm trying to use the SetLayerDefinition tool in my workflow. I'm unsure of how to utiliize a FeatureSet's geometry to restrict what features show in my Layer. Any help would be really appreciated at this point. Thank You!! -Laura 0 -
Trying this again. The form ate all the first post formating... thanks.
Here is an example using Nico Burgerhart's solution. Imho this process should be a single activity as it is a commonly used process.
Example: You need to select projects within a county. There is no county field on your project features. Use a county layer to select projects within a specific county's geometry.QueryTask
Where: Find your county by name
Return Geometry: True
Result: A FeatureSet
Get Geometry <Geometry>
We are using polygon in this case as the county is a polygon. There is only feature returned so we don't have to deal with the index.
FeatureSet: Use the feature set from above
Result: A new geometry variable
QueryTask
We now have the geometry to make our spacial selection.
Where: "1=1" We want everything in the geometry
Geometry: The geometry variable from above.
Return Geometry: false
Out fields: "OBJECTID"
Result: A feature set. These are the OBJECTID's of the projects within the county geometry.
Get Object IDs
FeatureSet: The feature set from above.
ObjectIDs: A new list variable.
Assign
The trick now is to create a string of comma delimited object ids which will be used for the definition input on SetLayerDefinition.
Create a string variable for the To input.
Then use Nico Burgerhart's code to convert the OBJECTIDs to a string. Where "objectIDList" is the variable you created in the step above.
string.Format("OBJECTID IN ({0})",String.Join(",", CType(objectIDList, IList(Of int32)).Select(Function(value) value.ToString )))
SetLayerDefinition
Definition: Use the string from the step above.0
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