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InMemoryGridFeatureLayer

Namespace: ThinkGeo.Core

This class uses the grid file provided.

public class InMemoryGridFeatureLayer : FeatureLayer

Inheritance ObjectLayerBaseLayerFeatureLayerInMemoryGridFeatureLayer

Properties

GridMatrix

public GridCell[,] GridMatrix { get; set; }

Property Value

GridCell[,]

CellSize

Gets the cell size from the grid.

public double CellSize { get; }

Property Value

Double

ColumnCount

Gets the column number from the grid.

public int ColumnCount { get; }

Property Value

Int32

RowCount

Gets the row number from the grid.

public int RowCount { get; }

Property Value

Int32

NoDataValue

Gets the NoDataValue from the grid.

public double NoDataValue { get; }

Property Value

Double

HasBoundingBox

This property checks to see if a Layer has a BoundingBox or not. If it has no BoundingBox, it will throw an exception when you call the GetBoundingBox() and GetFullExtent() APIs. In GridFeatureLayer, we override this API and mark it as true.

public bool HasBoundingBox { get; }

Property Value

Boolean

Remarks:

The default implementation in the base class returns false.

DataValueColumnName

public string DataValueColumnName { get; }

Property Value

String

DataWeightColumnName

public string DataWeightColumnName { get; }

Property Value

String

Projection

public Projection Projection { get; }

Property Value

Projection

EditTools

This property gets the EditTools that allow you to easily edit InternalFeatures in the Feature Layer.

public EditTools EditTools { get; protected set; }

Property Value

EditTools

        This property gets the EditTools that allow you to easily edit InternalFeatures in the
        Feature Layer.

Remarks:

The EditTools are supplied as an easily accessible wrapper for the editing methods of the FeatureSource.

FeatureIdsToExclude

A collection of strings representing record id of features not to get in the Layer.

public Collection<string> FeatureIdsToExclude { get; }

Property Value

Collection<String>

Remarks:

This string collection is a handy place to specify what records not to get from the source. Suppose you have a shape file of roads and you want to hide the roads within a particular rectangle, simply execute GetFeaturesInsideBoundingBox() and add the id of the return features to the collection and forget about them. Since you can set this by Layer it makes is easy to determine what to and what not to.

QueryTools

This property gets the QueryTools that allow you to easily query Features from the Feature Layer.

public QueryTools QueryTools { get; protected set; }

Property Value

QueryTools

        This property gets the QueryTools that allow you to easily query Features from the
        Feature Layer.

Remarks:

This property gets the QueryTools that allow you to easily query Features from the Feature Layer. The QueryTools are supplied as an easily accessible wrapper for the query methods of the FeatureSource.

MaxRecordsToDraw

public int MaxRecordsToDraw { get; set; }

Property Value

Int32

FeatureSource

This property gets the FeatureSource for the FeatureLayer.

public FeatureSource FeatureSource { get; set; }

Property Value

FeatureSource
This property gets the FeatureSource for the FeatureLayer.

Remarks:

The FeatureSource is the provider of data to the FeatureLayer. There are different FeatureSource classes to match the various ways that feature data is stored. It is important that, when you inherit from the FeatureLayer, in the constructor you set the FeatureSource you want to use.

DrawingQuality

This property gets and sets the general drawing quality for the FeatureLayer's view.

public DrawingQuality DrawingQuality { get; set; }

Property Value

DrawingQuality

        This property gets the general drawing quality for the FeatureLayer's
        view.

Remarks:

The DrawingQuality enumeration allows you to control, in a macro sense, the drawing quality that will be used in the GeoCanvas. Each GeoCanvas, which is responsible for drawing of the features, may have its own specialized drawing quality properties. What the DrawingQuality enumeration does is define some general guidelines for each GeoCanvas. For example, if you set the DrawingQuality to HighSpeed, then inside of the PlatformGeoCanvas there is a profile for HighSpeed. This profile sets specific properties, such as the smoothing mode and composing drawing mode of the PlatformGeoCanvas. As each GeoCanvas may have different drawing quality properties, this offers a general way to control drawing quality and speed.

If you need complete control over how a specific GeoCanvas will draw, then you can set the DrawingQuality to Custom. This will tell the specific GeoCanvas to use the properties on its own object instead of one of the pre-defined profiles. If one of the profiles -- such as HighSpeed or HighQuality -- is set, then the specific GeoCanvas ignores its own properties for drawing quality.

ZoomLevelSet

This property gets and sets the ZoomLevelSet, which contains the specific zoom levels for the FeatureLayer.

public ZoomLevelSet ZoomLevelSet { get; set; }

Property Value

ZoomLevelSet

        This property gets the ZoomLevelSet, which contains the specific zoom levels for
        the FeatureLayer.

Remarks:

The ZoomLevelSet is a class that contains all of the ZoomLevels for the FeatureLayer. Each ZoomLevel contains the styles that are used to determine how to draw the InternalFeatures.

DrawingMarginInPixel

public float DrawingMarginInPixel { get; set; }

Property Value

Single

Attribution

public string Attribution { get; set; }

Property Value

String

RequestDrawingInterval

public TimeSpan RequestDrawingInterval { get; set; }

Property Value

TimeSpan

Name

This property gets and sets the name for the layer.

public string Name { get; set; }

Property Value

String

Remarks:

The name is user defined. It is useful to set, as it may be used for higher level components such as legends, etc.

IsOpen

This property returns true if the Layer is open and false if it is not.

public bool IsOpen { get; }

Property Value

Boolean

Remarks:

This method is the concrete wrapper for the abstract method IsOpenCore. Various methods on the Layer require that it be in an open state. If one of those methods is called when the state is not open, then the method will throw an exception. To enter the open state, you must call the Layer Open method. The method will raise an exception if the current Layer is already open.

As this is a concrete public method that wraps a Core method, we reserve the right to add events and other logic to pre- or post-process data returned by the Core version of the method. In this way, we leave our framework open on our end, but also allow you the developer to extend our logic to suit your needs. If you have questions about this, please contact our support team as we would be happy to work with you on extending our framework.

IsVisible

This property gets and set the visible state of the layer.

public bool IsVisible { get; set; }

Property Value

Boolean

Remarks:

If this property is set to false, the layer will not draw. We ensure this in the Draw method. This is useful for legends and other controls that control the visibility of layers.

DrawingTime

This property gets the last drawing time for the layer.

public TimeSpan DrawingTime { get; protected set; }

Property Value

TimeSpan

Remarks:

We track the drawing time for the layer and report it back in this method. This is useful for determining the speed of various layers.

DrawingExceptionMode

public DrawingExceptionMode DrawingExceptionMode { get; set; }

Property Value

DrawingExceptionMode

Background

Gets and sets the background of the layer.

public GeoColor Background { get; set; }

Property Value

GeoColor

Transparency

This property gets and sets the amount of transparency to apply to the image.

public float Transparency { get; set; }

Property Value

Single
This property gets the amount of transparency to apply to the image.

Remarks:

None

BlueTranslation

This property gets and sets the amount of blue to apply to the image.

public float BlueTranslation { get; set; }

Property Value

Single
This property gets the amount of blue to apply to the image.

Remarks:

None

RedTranslation

This property gets and sets the amount of red to apply to the image.

public float RedTranslation { get; set; }

Property Value

Single
This property gets the amount of red to apply to the image.

Remarks:

None

GreenTranslation

This property gets and sets the amount of green to apply to the image.

public float GreenTranslation { get; set; }

Property Value

Single
This property gets the amount of green to apply to the image.

Remarks:

None

KeyColors

Gets a value represents a collection of key colors. If SupportKeyColor property is false, it will throw exception when you use KeyColors.

public Collection<GeoColor> KeyColors { get; }

Property Value

Collection<GeoColor>

Remarks:

It will make these colors transparent when draw image.

IsNegative

This property gets and sets whether the image should be converted to negative (inverse colors).

public bool IsNegative { get; set; }

Property Value

Boolean
This property gets and sets whether the image should be converted to negative (inverse colors).

Remarks:

None

IsGrayscale

This property gets and sets if the image should be converted to grayscale.

public bool IsGrayscale { get; set; }

Property Value

Boolean

        This property gets and sets if the image should be converted to grayscale.

Remarks:

None

ThreadSafe

public ThreadSafetyLevel ThreadSafe { get; set; }

Property Value

ThreadSafetyLevel

ColorMappings

ColorMapping

public Dictionary<GeoColor, GeoColor> ColorMappings { get; }

Property Value

Dictionary<GeoColor, GeoColor>

WrappingMode

public WrappingMode WrappingMode { get; set; }

Property Value

WrappingMode

WrappingExtent

public RectangleShape WrappingExtent { get; set; }

Property Value

RectangleShape

Constructors

InMemoryGridFeatureLayer()

This is the default constructor for the class.

public InMemoryGridFeatureLayer()

Remarks:

This is the default constructor. If you use this constructor, then you need to set the required properties manually.

InMemoryGridFeatureLayer(GridCell[,])

public InMemoryGridFeatureLayer(GridCell[,] gridMatrix)

Parameters

gridMatrix GridCell[,]

Methods

GetBoundingBoxCore()

This method returns the bounding box of the FeatureLayer.

protected RectangleShape GetBoundingBoxCore()

Returns

RectangleShape
This method returns the bounding box of the FeatureLayer.

Exceptions

InvalidOperationException
In the event you attempt to call this method on a FeatureLayer which has not been opened, it will throw an InvalidOperationException.

Remarks:

This method is called from the concrete public method GetBoundingBox. It returns the bounding box of the FeatureLayer.

GenerateGrid(GridDefinition, GridInterpolationModel, Stream, Func<Double, String>)

public static void GenerateGrid(GridDefinition gridDefinition, GridInterpolationModel gridInterpolationModel, Stream outputStream, Func<double, string> cellValueToStringFunc)

Parameters

gridDefinition GridDefinition

gridInterpolationModel GridInterpolationModel

outputStream Stream

cellValueToStringFunc Func<Double, String>

GenerateGridMatrix(GridDefinition, GridInterpolationModel)

public static GridCell[,] GenerateGridMatrix(GridDefinition gridDefinition, GridInterpolationModel gridInterpolationModel)

Parameters

gridDefinition GridDefinition

gridInterpolationModel GridInterpolationModel

Returns

GridCell[,]

GenerateGridMatrix()

public GridCell[,] GenerateGridMatrix()

Returns

GridCell[,]

Events

DrawingFeatures

This event is raised when features are about to be drawn in the layer.

public event EventHandler<DrawingFeaturesEventArgs> DrawingFeatures;

Remarks:

This event is raised when features are about to be drawn in the layer. In the event arguments, there is a collection of features to be drawn. You can easily add or remove items from this collection so that extra items will draw or not draw.

DrawingWrappingFeatures

public event EventHandler<DrawingWrappingFeaturesFeatureLayerEventArgs> DrawingWrappingFeatures;

DrawingAttribution

public event EventHandler<DrawingAttributionLayerEventArgs> DrawingAttribution;

DrawnAttribution

public event EventHandler<DrawnAttributionLayerEventArgs> DrawnAttribution;

DrawingProgressChanged

public event EventHandler<DrawingProgressChangedEventArgs> DrawingProgressChanged;

RequestedDrawing

public event EventHandler<RequestedDrawingLayerEventArgs> RequestedDrawing;

RequestingDrawing

public event EventHandler<RequestingDrawingLayerEventArgs> RequestingDrawing;

DrawingException

public event EventHandler<DrawingExceptionLayerEventArgs> DrawingException;

DrawnException

public event EventHandler<DrawnExceptionLayerEventArgs> DrawnException;