edu.umn.cs.spatialHadoop.visualization

Class RoadNetworkPlot.GeometricRasterizer

java.lang.Object

edu.umn.cs.spatialHadoop.visualization.Rasterizer

edu.umn.cs.spatialHadoop.visualization.RoadNetworkPlot.GeometricRasterizer

Enclosing class:

RoadNetworkPlot

public static class RoadNetworkPlot.GeometricRasterizer
extends Rasterizer

Constructor Summary

Constructors

Constructor and Description
RoadNetworkPlot.GeometricRasterizer()

Method Summary

Methods

Modifier and Type	Method and Description
void	configure(Configuration conf) Configures this rasterizer according to the MapReduce program.
RasterLayer	createRaster(int width, int height, Rectangle mbr) Creates an empty raster layer of the given width and height.
int	getRadius() Returns the radius in pixels that one object might affect in the image.
java.lang.Class<? extends RasterLayer>	getRasterClass() Returns the raster class associated with this rasterizer
void	merge(RasterLayer finalLayer, RasterLayer intermediateLayer) Merges an intermediate layer into the final layer based on its location
void	rasterize(RasterLayer rasterLayer, Shape shape) Rasterizes one shape to the given layer
<S extends Shape> java.lang.Iterable<S>	smooth(java.lang.Iterable<S> r) Smooth a set of records that are spatially close to each other and returns a new set of smoothed records.
void	writeImage(RasterLayer layer, java.io.DataOutputStream out, boolean vflip) Writes a raster layer as an image to the output.

Methods inherited from class edu.umn.cs.spatialHadoop.visualization.Rasterizer

getRasterizer, isSmooth, rasterize, rasterize, setRasterizer

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RoadNetworkPlot.GeometricRasterizer

public RoadNetworkPlot.GeometricRasterizer()

Method Detail

configure

public void configure(Configuration conf)

Description copied from class: Rasterizer

Configures this rasterizer according to the MapReduce program.

Overrides:

configure in class Rasterizer

smooth

public <S extends Shape> java.lang.Iterable<S> smooth(java.lang.Iterable<S> r)

Description copied from class: Rasterizer

Smooth a set of records that are spatially close to each other and returns a new set of smoothed records. This method is called on the original raw data before it is visualized. The results of this function are the records that are visualized.

Overrides:

smooth in class Rasterizer

Returns:

createRaster

public RasterLayer createRaster(int width,
                       int height,
                       Rectangle mbr)

Description copied from class: Rasterizer

Creates an empty raster layer of the given width and height.

Specified by:

createRaster in class Rasterizer

Parameters:

width - - Width of the created layer in pixels

height - - Height of the created layer in pixels

mbr - - The minimal bounding rectangle of the layer in the input

Returns:

rasterize

public void rasterize(RasterLayer rasterLayer,
             Shape shape)

Description copied from class: Rasterizer

Rasterizes one shape to the given layer

Specified by:

rasterize in class Rasterizer

Parameters:

rasterLayer - - the layer to rasterize to. This layer has to be created using the method Rasterizer.createRaster(int, int, Rectangle).

shape - - the shape to rasterize

getRasterClass

public java.lang.Class<? extends RasterLayer> getRasterClass()

Description copied from class: Rasterizer

Returns the raster class associated with this rasterizer

Overrides:

getRasterClass in class Rasterizer

Returns:

merge

public void merge(RasterLayer finalLayer,
         RasterLayer intermediateLayer)

Description copied from class: Rasterizer

Merges an intermediate layer into the final layer based on its location

Specified by:

merge in class Rasterizer

getRadius

public int getRadius()

Description copied from class: Rasterizer

Returns the radius in pixels that one object might affect in the image. This is used to ensure that each image is generated correctly by using all records in the buffer area.

Overrides:

getRadius in class Rasterizer

Returns:

writeImage

public void writeImage(RasterLayer layer,
              java.io.DataOutputStream out,
              boolean vflip)
                throws java.io.IOException

Description copied from class: Rasterizer

Writes a raster layer as an image to the output.

Specified by:

writeImage in class Rasterizer

Parameters:

layer - - the layer to be written to the output as an image

out - - the output stream to which the image will be written

vflip - - if true, the image is vertically flipped before written

Throws:

java.io.IOException