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Graphics and Symbology

JayKappy

I have a feature set that I am quering. Graphics are created and placed on the map using a predefined symbol. Everything works great.
But I want to symbols to reflect the data....say they are police incidents. I want a grpahic for Burglary, Car Accident etc etc.
What are my options here....do I apply an image to the graphic instead of a symbol?
Keeping in mind that I want to also address speed...I dont want to be drawing tons of images etc.

Thoughts?

Thanks

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DominiqueBroux

It's exactly what the renderers are for.

You'll find sample here : http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#RenderersXAML

JayKappy

Thanks...

So in that example I could do something like this if I wanted to shade it, Fill it, outline it etc.

<esri:UniqueValueInfo Value="Arizona" Symbol="{StaticResource MyRedFillSymbol}" />

But what if I wanted to symbolize the graphic with an image? Or some symbology that we are used to seeing in ArcMap....I know these wont work but just trying to understand here...

Tryign to find out the best way to step up the symbology to seomthing more represenitive of my data...like
ESRI symbology from ArcMap
Images that I create

That possible or wise?

<esri:UniqueValueInfo Value="Arizona" Source="/Assets/images/PushPin3.png"/>

<esri:UniqueValueInfo Value="Arizona" Symbol="{SOME ESRI SYMBOL}" />

DominiqueBroux

That possible or wise?

Code:
<esri:UniqueValueInfo Value="Arizona" Source="/Assets/images/PushPin3.png"/>
Code:
<esri:UniqueValueInfo Value="Arizona" Symbol="{SOME ESRI SYMBOL}" />

The second syntax is the right one and you can use any symbols existing in the ArcGIS Silverlight client API.
To get an image as symbol, the PictureMarkerSymbol is what you need. There is a sample of pushpin symbol here :
http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#AddGraphicsXAML

JayKappy

Awesome....thank you....

one last question....Is there a location that I can go to and see all the available symbols existing in the Silverlight Client API?

Thanks again....

DominiqueBroux

The API documentation will give you the existing types of symbols : http://help.arcgis.com/en/webapi/silverlight/apiref/ESRI.ArcGIS.Client~ESRI.ArcGIS.Client.Symbols_namespace.html

To get samples of symbols, you can look at the symbol gallery : http://help.arcgis.com/en/webapi/silverlight/samples/SymbolGalleryWeb/start.htm

JayKappy

I also noticed that the Renderer is workign on a Feature Layer....I have a grpahics layer and that does NOT like the WHERE clause

Thougths?

                <esri:FeatureLayer ID="MyFeatureLayerClassBreak"
                    Url="http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StatesCitiesRivers_USA/MapServer/0" 
                    Where="STATE_NAME in ('New Mexico', 'Arizona', 'Texas')" 
                    Renderer="{StaticResource MyClassBreaksRenderer}"
                    OutFields="POP1990"  />

                    <esri:GraphicsLayer ID="MyGraphicsLayerListBox1" 
                                        MouseLeftButtonDown="GraphicsLayer_MouseLeftButtonDown"
                                        MouseEnter="imageList1_Mousehover" 
                                        Visible="False" />

I am thinking that I might have to assign this in VB....each pass through the Loop assign the specific image based off the value??????

Yea I tried to set it using XAML and I dotn think that is going to work for me....as I am setting the symbol in VB...I tried to call the renderer in the exampel from VB and not working....
Do I have to set this up in VB?

        For Each selectedGraphic As Graphic In args.FeatureSet.Features
            selectedGraphic.Symbol = TryCast(LayoutRoot.Resources("StrobeMarkerSymbol_Blue"), ESRI.ArcGIS.Client.Symbols.Symbol)
            'selectedGraphic.Symbol = TryCast(LayoutRoot.Resources("MyUniqueValueRenderer"), ESRI.ArcGIS.Client.Symbols.Symbol)           
            _resultsGraphicsLayer.Graphics.Add(selectedGraphic)
        Next selectedGraphic

THINK I AM HAVING issues because its a graphics layer....Can I even do this on a graphics layer?

DominiqueBroux

I also noticed that the Renderer is workign on a Feature Layer....I have a grpahics layer
THINK I AM HAVING issues because its a graphics layer....Can I even do this on a graphics layer?

Renderers are working with feature layers AND with graphics layers.

Do I have to set this up in VB?

If you set up a renderer on the layer, you don't have to set the symbols on the graphics by code.

JayKappy

I am doing this: and the app wont even open....Can you see anything...what am I missing....I was figuring that I would have to specify the symbol in the VB but from what you said I dont have to...as long as the Renderer is specified on the "GraphicsLayer"

I removed the line from teh VB that was setting the symbology...
selectedGraphic.Symbol = TryCast(LayoutRoot.Resources("StrobeMarkerSymbol_Blue"), ESRI.ArcGIS.Client.Symbols.Symbol)

With this my application will NOT open...so I have a big error somewhere....

            
    <Grid x:Name="LayoutRoot" Background="{StaticResource BaseColor}">
        <Grid.Resources>
            <esri:SimpleMarkerSymbol x:Key="BLUEMarkerSymbol" Color="Blue" Size="12" Style="Circle" />
            <esri:SimpleMarkerSymbol x:Key="PURPLEMarkerSymbol" Color="Purple" Size="12" Style="Circle" />
            
            <esri:UniqueValueRenderer x:Key="MyUniqueValueRenderer" Attribute="TYPE" >
                <esri:UniqueValueRenderer.Infos>
                    <esri:UniqueValueInfo Value="Church" Symbol="{StaticResource BLUEMarkerSymbol}" />
                    <esri:UniqueValueInfo Value="SCHOOL" Symbol="{StaticResource PURPLEMarkerSymbol}" />
                </esri:UniqueValueRenderer.Infos>
            </esri:UniqueValueRenderer>

        </Grid.Resources>

   <Grid Grid.Row="2">
        </esri:Map.Extent>
                <esri:Map.Layers>
                    <esri:GraphicsLayer ID="MyGraphicsLayerBufferResults" 
                                        MouseEnter="imageBuffer_Mousehover" 
                                        MouseLeftButtonDown="GraphicsLayerBuffer_MouseLeftButtonDown"
                                        Renderer="MyUniqueValueRenderer"
                                        >
                 </esri:Map.Layers>
        </esri:Map>


        _resultsGraphicsLayer = TryCast(MyMap.Layers("MyGraphicsLayerBufferResults"), GraphicsLayer)        

        If args.FeatureSet.Features.Count < 1 Then
            MessageBox.Show("No features found")
            Return
            End If
        For Each selectedGraphic As Graphic In args.FeatureSet.Features

            _resultsGraphicsLayer.Graphics.Add(selectedGraphic)

        Next selectedGraphic

As Soon as I put this line in the GraphicLayer it bombs out

Renderer="MyUniqueValueRenderer"

DominiqueBroux

I suggest you add a default symbol to your unique value renderer, so we will know if the issue is coming from the values of your attribute 'TYPE'.

JayKappy

I suggest you add a default symbol to your unique value renderer, so we will know if the issue is coming from the values of your attribute 'TYPE'.

I tried this .... No go....But dont even know if i can do what I did below..or if thats what you were talking about...

            <esri:SimpleMarkerSymbol x:Key="BLUEMarkerSymbol" Color="Blue" Size="12" Style="Circle" />
            <esri:SimpleMarkerSymbol x:Key="PURPLEMarkerSymbol" Color="Purple" Size="12" Style="Circle" />

            <esri:UniqueValueRenderer x:Key="MyUniqueValueRenderer" Attribute="TYPE" DefaultSymbol="BLUEMarkerSymbol" >
                <esri:UniqueValueRenderer.Infos>
                    <esri:UniqueValueInfo Value="Church" Symbol="{StaticResource PURPLEMarkerSymbol}" />
                    <esri:UniqueValueInfo Value="SCHOOL" Symbol="{StaticResource PURPLEMarkerSymbol}" />
                </esri:UniqueValueRenderer.Infos>
            </esri:UniqueValueRenderer>

DominiqueBroux

It's something like:

          <esri:UniqueValueRenderer x:Key="MyUniqueValueRenderer" Attribute="TYPE" DefaultSymbol="{StaticResource BLUEMarkerSymbol}">
                <esri:UniqueValueRenderer.Infos>
                    <esri:UniqueValueInfo Value="Church" Symbol="{StaticResource BLUEMarkerSymbol}" />
                    <esri:UniqueValueInfo Value="SCHOOL" Symbol="{StaticResource PURPLEMarkerSymbol}" />
                </esri:UniqueValueRenderer.Infos>
            </esri:UniqueValueRenderer>

JayKappy

I have no idea whats going on here....as soon as I put in the line Renderer="MyUniqueValueRenderer" it errors out...

I remove teh line and then uncomment this line in my VB code and It works fine...but not rendering the features...

selectedGraphic.Symbol = TryCast(LayoutRoot.Resources("StrobeMarkerSymbol_Blue"), ESRI.ArcGIS.Client.Symbols.Symbol)

Not these Graphics are derived from a query that finds a parcel, buffers the parcel and then grabs the points that are in that buffer and then draws them....the later is what I am trying to symbolize...

Any other thoughts....I think there is something messed up here but cant see it....It should be working.

            <!-- UNIQUE VALUE RENDERER  -->
            <esri:SimpleMarkerSymbol x:Key="BLUEMarkerSymbol" Color="Blue" Size="12" Style="Circle" />
            <esri:SimpleMarkerSymbol x:Key="PURPLEMarkerSymbol" Color="Purple" Size="12" Style="Circle" />

            <esri:UniqueValueRenderer x:Key="MyUniqueValueRenderer" Attribute="TYPE" DefaultSymbol="{StaticResource BLUEMarkerSymbol}">
                <esri:UniqueValueRenderer.Infos>
                    <esri:UniqueValueInfo Value="Church" Symbol="{StaticResource PURPLEMarkerSymbol}" />
                    <esri:UniqueValueInfo Value="SCHOOL" Symbol="{StaticResource PURPLEMarkerSymbol}" />
                </esri:UniqueValueRenderer.Infos>
            </esri:UniqueValueRenderer>



                    <esri:GraphicsLayer ID="MyGraphicsLayerBufferResults" 
                                        MouseEnter="imageBuffer_Mousehover" 
                                        MouseLeftButtonDown="GraphicsLayerBuffer_MouseLeftButtonDown"
                                        Renderer="MyUniqueValueRenderer"
                                        >
                        <esri:GraphicsLayer.MapTip>
                            <Border esri:GraphicsLayer.MapTipHideDelay="00:00:01.5" CornerRadius="10" 
                                    BorderBrush="#FF222957" BorderThickness="3" Margin="0,0,15,15">
                                <Border.Background>
                                    <LinearGradientBrush EndPoint="1.038,1.136" StartPoint="0.015,0.188">
                                        <GradientStop Color="#FFD1DFF2"/>
                                        <GradientStop Color="#FF092959" Offset="0.946"/>
                                    </LinearGradientBrush>
                                </Border.Background>
                                <Border.Effect>
                                    <DropShadowEffect ShadowDepth="10" BlurRadius="14" Direction="300" />
                                </Border.Effect>
                                <StackPanel Orientation="Vertical">
                                    <StackPanel Orientation="Horizontal">
                                        <TextBlock Text="Distance: " FontWeight="Bold" HorizontalAlignment="Left" VerticalAlignment="Bottom" />
                                        <TextBlock Text="{Binding [BUFFER_DISTANCE]}" HorizontalAlignment="Left" VerticalAlignment="Center" />
                                        <TextBlock Text="  meters from parcel" HorizontalAlignment="Left" VerticalAlignment="Bottom" />
                                    </StackPanel>
                                  </StackPanel>
                            </Border>
                        </esri:GraphicsLayer.MapTip>

                    </esri:GraphicsLayer>

    Private Sub QueryTask_ExecuteCompletedBuffer2(ByVal sender As Object, ByVal args As QueryEventArgs)

        Dim featureSet As FeatureSet = args.FeatureSet
        If args.FeatureSet.Features.Count < 1 Then
            MessageBox.Show("No features found")
            Return
            End If
        For Each selectedGraphic As Graphic In args.FeatureSet.Features
           '  Commented out
            ' selectedGraphic.Symbol = TryCast(LayoutRoot.Resources("StrobeMarkerSymbol_Blue"), ESRI.ArcGIS.Client.Symbols.Symbol)            
           _resultsGraphicsLayer.Graphics.Add(selectedGraphic)

        Next selectedGraphic

JenniferNery

This line Renderer="MyUniqueValueRenderer" is not correct. Renderer property expects IRenderer not a string, therefore you need to change it to:
Renderer="{StaticResource MyUniqueValueRenderer}"

This will point to a resource in your dictionary.

JayKappy

Thanks Jennifer and Dominique....I dont know how I got that syntax for the Renderer line...I swore I copied it from the ESRI examples....maybe I wrote the line myself....either way thank you

Things are working now....on to another unknown....your help is very appreciated....thank you

JayKappy

Last question....using the Class Breaks Renderer

I have a feature class that has a field called "PRECINCTS_" and its DOUBLE
The field values range from 1-30
I am trying this and only getting the default.

Thoughts?

            <esri:SimpleFillSymbol x:Key="MyYellowFillSymbol" Fill="#44FFFF00" BorderBrush="Transparent" BorderThickness="2" />
            <esri:SimpleFillSymbol x:Key="MyRedFillSymbol" Fill="#44FF0000" BorderBrush="Transparent" BorderThickness="2" />
            <esri:SimpleFillSymbol x:Key="MyBlueFillSymbol" Fill="Blue" BorderBrush="Transparent" BorderThickness="2" />
            <esri:ClassBreaksRenderer x:Key="MyClassBreaksRenderer" Attribute="PRECINCTS_" DefaultSymbol="{StaticResource MyRedFillSymbol}">
               <esri:ClassBreaksRenderer.Classes>
                    <esri:ClassBreakInfo MinimumValue="0.0000" MaximumValue="8.0000" Symbol="{StaticResource MyYellowFillSymbol}" />
                    <esri:ClassBreakInfo MinimumValue="8.0001" MaximumValue="15.0000" Symbol="{StaticResource MyRedFillSymbol}" />
                    <esri:ClassBreakInfo MinimumValue="15.0001" MaximumValue="50.0000" Symbol="{StaticResource MyBlueFillSymbol}" />
               </esri:ClassBreaksRenderer.Classes>
            </esri:ClassBreaksRenderer>

JayKappy

GOT IT!!!!!

Didnt specify any out fields for the Renderer to render against...

                    <esri:FeatureLayer ID="MG_PrecinctsClassBreak" 
                     Url="http://gis.logis.org/arcgis/rest/services/MG_Test/MapServer/6"
                    Renderer="{StaticResource MyClassBreaksRenderer}"
                    OutFields="PRECINCTS_"   />

JayKappy

Is there limit on the number of features that can be calculated in the ClassBreakRender...I have it working for a feature that has 5 records.
I then try it against my parcels feature class...about 25,000 records. It starts to draw but only gets about 5% and then stops drawing

Thanks

JenniferNery

The service may have reached its limit of how many features it can return at once (the default is 500 for ArcGIS Server 9.3.1, 1000 for ArcGIS Server 10, 1000 for MapIt). Post# 2 on this thread is a good response to your question 🙂 http://forums.arcgis.com/threads/17522-Cannot-add-Layer-with-more-than-500-Features

JayKappy

Great....well sort of....Its good that I know its not something in my code or dataset. Knowing I hit an acutal limitation is all I needed to know...
Thank you for teh reference material...will look into that..

THanks

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