[GIS] How to avoid “No Data” from Tiled Map Service in Silverlight

arcgis-serversilverlightweb-mapping

I'm using the latest and greatest Silverlight with ArcGIS Server 10 and when I do a search for features in my operational layers (wells) and zoom into them I'm seeing "Map Data Not Yet Available" because there are no Tiles created at the scale I have zoomed into. I published my Operational data from a MSD and it runs great and I added in a ESRI Streets layer service using manager. The only way I have found to control the scales of the Tiled ESRI service is to create a Group layer in the MXD and publish the MXD straight to a service. This will not work for me because the performance is too slow. Does anyone have any suggestions?

Many thanks
-Josh

Best Answer

You can set a minimum extent in the Silverlight API to ensure that the user can not zoom in beyond that scale.

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[GIS] Creating Chart in Silverlight that is bound to Layer in Map

I did a similar kind of thing some time back. I did this for a featurelayer/graphics layer using ESRI ArcGIS API

Binding the feature/graphics layer attributes to a data grid (did not use the featuredata grid ESRI provides) Then bind a specific grid column to a chart. Infact the way I did was the user can click on a column and the chart would display that column (simple bar chart). So you click a different column the chart changes.

This is how i did it C# code I have a method which executes a GP task that returns a graphics layer I iterate each graphic, create an observable collection and bind the observable collection to the data grid. there are other ways to bind but this worked for me when used with the chart.

    // GP task that returns graphics
    public void Execute(object parameter)
    {
        Geoprocessor getData = new Geoprocessor();
        getData.Url = "GP task URL...";
        getData.Failed += this.GP_Failed;
        getData.GetResultDataCompleted += this.GP_GetResultDataCompleted;
        getData.GetResultDataAsync(this.jobId, "parameter");            
    }

    // The event raised when GP task successful
    void GP_GetResultDataCompleted(object sender, GPParameterEventArgs e)
    {
        object attributeValue = null;

        // Internal class object
        CategoryAttributes categoryAttributes = new CategoryAttributes();

        if (e.Parameter is GPFeatureRecordSetLayer)
        {
            GPFeatureRecordSetLayer gpLayer = e.Parameter as GPFeatureRecordSetLayer;
         
            // Create a new graphics layer
            GraphicsLayer graphicsLayer = new GraphicsLayer();
            graphicsLayer.ID = "GraphicsLayer";

            // Add the graphics to the graphics layer and an observable collection that is binded to a data grid
            foreach (Graphic graphic in gpLayer.FeatureSet.Features)
            {
                CategoryAttribute categoryAttribute = new CategoryAttribute();

                attributeValue = g.Attributes.Where(x => x.Key.Contains("CategoryCount")).SingleOrDefault().Value;
                if (attributeValue != null)
                {
                    categoryAttribute.Count = attributeValue.ToString();
                }

                attributeValue = g.Attributes.Where(x => x.Key.Contains("CategoryValue")).SingleOrDefault().Value;
                if (attributeValue != null)
                {
                    categoryAttribute.Value = attributeValue.ToString();
                }

                attributeValue = g.Attributes.Where(x => x.Key.Contains("CategoryAmount")).SingleOrDefault().Value;
                if (attributeValue != null)
                {
                    categoryAttribute.Amount = attributeValue.ToString();
                }
                categoryAttributes.Add(categoryAttribute);

                graphicsLayer.Graphics.Add(graphic);
            }

            // Add to map
            this.myMap.Layers.Add(graphicsLayer);

            // Bind data to data grid
            this.MyDataGrid.ItemsSource = categoryAttributes;
        }
    }

    // Internal classes for creating the observable collection
    internal class CategoryAttributes : ObservableCollection<CategoryAttribute>
    {
    }
    internal class CategoryAttribute
    {
        public double CategoryCount { get; set; }
        public double CategoryValue { get; set; }
        public double CategoryAmount { get; set; }
    }

[GIS] Publishing Geoprocessing Service with ArcGIS Server

Server object instance creation failed on all SOC machines is triggered when the SOC account does not have access to the resources that your trying to publish.

Try right clicking ArcCatalog and running it as the SOC account. Can you browse to \MyServer\ArcGIS Resources\Test\ and able to see the MXD, layers and toolbox?

Everything used in the model needs to be accessible to the SOC.

See preparing resources for publishing for more details on how to setup the relevant permissions.

Best Answer

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[GIS] Creating Chart in Silverlight that is bound to Layer in Map

[GIS] Publishing Geoprocessing Service with ArcGIS Server

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