ImageMosaicFormat (Geotools modules 27-SNAPSHOT API)

Object
- AbstractGridFormat
- - ImageMosaicFormat

All Implemented Interfaces:

Format
```
public final class ImageMosaicFormat
extends AbstractGridFormat
implements Format
```
AbstractGridFormat subclass for controlling ImageMosaicReader creation. As the name says, it handles mosaic of georeferenced images, which means
1. tiff+tfw+prj
2. jpeg+tfw+prj
3. png+tfw+prj
4. geotiff
This does not mean that you throw there a couple of images and it will do the trick no matter how these images are. Requirements are:
- (almost) equal spatial resolution
- same number of bands
- same data type
- same projection
The first requirement can be relaxed a little but if they have the same spatial resolution the performances are much better. There are parameters that you can use to control the behaviour of the mosaic in terms of thresholding and transparency. They are as follows:
- --DefaultParameterDescriptor FINAL_ALPHA = new DefaultParameterDescriptor( "FinalAlpha", Boolean.class, null, Boolean.FALSE)-- It asks the plugin to add transparency on the final created mosaic. IT simply performs a threshonding looking for areas where there is no data, i.e., intensity is really low and transform them into transparent areas. It is obvious that depending on the nature of the input images it might interfere with the original values.
- ---ALPHA_THRESHOLD = new DefaultParameterDescriptor( "AlphaThreshold", Double.class, null, Double.valueOf(1));--- Controls the transparency addition by specifying the treshold to use.
- INPUT_IMAGE_THRESHOLD = new DefaultParameterDescriptor( "InputImageROI", Boolean.class, null, Boolean.FALSE)--- INPUT_IMAGE_THRESHOLD_VALUE = new DefaultParameterDescriptor( "InputImageROIThreshold", Integer.class, null, Integer.valueOf(1));--- These two can be used to control the application of ROIs on the input images based on tresholding values. Basically using the threshold you can ask the mosaic plugin to load or not certain pixels of the original images.
Since:

2.3

Author:

Simone Giannecchini (simboss), GeoSolutions, Stefan Alfons Krueger (alfonx), Wikisquare.de : Support for jar:file:foo.jar/bar.properties URLs

Field Summary

Fields
Modifier and Type	Field and Description
`static ParameterDescriptor<Boolean>`	`ACCURATE_RESOLUTION` Control the requested resolution calculation.
`static ParameterDescriptor<Boolean>`	`ALLOW_MULTITHREADING` Control the threading behavior for this plugin.
`static ParameterDescriptor<Double>`	`ARTIFACTS_FILTER_PTILE_THRESHOLD` Control the artifact filter ptile thresholding
`static ParameterDescriptor<double[]>`	`BACKGROUND_VALUES` Control the background values for the output coverage
`static ParameterDescriptor<Integer>`	`DEFAULT_ARTIFACTS_FILTER_THRESHOLD` Control the default artifact filter luminance thresholding on the input coverages
`static ParameterDescriptor<ExcessGranulePolicy>`	`EXCESS_GRANULE_REMOVAL` Controls the removal of excess granules This parameter controls whether the mosaic will attempt to remove excess granules, that is, granules not contributing pixels to the output, before performing the mosaicking.
`static ParameterDescriptor<Boolean>`	`FADING` Control the type of the final mosaic.
`static ParameterDescriptor<Filter>`	`FILTER` Filter tiles based on attributes from the input coverage
`static ParameterDescriptor<Geometry>`	`GEOMETRY_MASK` mask (as a polygon in native coordinates) to be applied to the produced mosaic.
`static ParameterDescriptor<Interpolation>`	`INTERPOLATION` Control the interpolation to be used in mosaicking
`static ParameterDescriptor<Double>`	`MASKING_BUFFER_PIXELS` Control the Masking buffering (in raster size)
`static ParameterDescriptor<Integer>`	`MAX_ALLOWED_TILES` Control the thresholding on the input coverage
`static ParameterDescriptor<String>`	`MERGE_BEHAVIOR` Merging behavior for the various granules of the mosaic we are going to produce.
`static ParameterDescriptor<Boolean>`	`OUTPUT_TO_ALTERNATIVE_CRS` When this read parameter is set to true, the reader will produce output in the requested CRS, assuming it matches one of the native CRSs, as reported by the #GridCoverage2DReader@MULTICRS_EPSGCODES metadata entry, and that the requested grid geometry is expressed in said CRS.
`static ParameterDescriptor<Color>`	`OUTPUT_TRANSPARENT_COLOR` Control the transparency of the output coverage.
`static ParameterDescriptor<Boolean>`	`SET_ROI_PROPERTY` Control whether to set the ROI property in the output mosaic (as an instance, even when background values are set which usually results into setting a null ROI after the mosaic)
`static ParameterDescriptor<String>`	`SORT_BY` Optional Sorting for the granules of the mosaic.
`static ParameterDescriptor<double[]>`	`VIRTUAL_NATIVE_RESOLUTION` Defines a virtual native resolution.

Constructor Summary

Constructors
Constructor and Description

ImageMosaicFormat()
Creates an instance and sets the metadata.

Constructors
Constructor and Description
`ImageMosaicFormat()` Creates an instance and sets the metadata.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`accepts(Object source)` Tells me if this `Format` can read the provided `input`.
`boolean`	`accepts(Object source, Hints hints)` Tells me if this `Format` can read the provided `input`.
`GeoToolsWriteParams`	`getDefaultImageIOWriteParameters()` Throw an exception since this plugin is readonly.
`ImageMosaicReader`	`getReader(Object source)` Gets a `GridCoverageReader` for this format able to create coverages out of the `source` object.
`ImageMosaicReader`	`getReader(Object source, Hints hints)` Gets a `GridCoverageReader` for this format able to create coverages out of the `source` object using the provided `hints`.
`GridCoverageWriter`	`getWriter(Object destination)` Retrieves a `GridCoverageWriter` suitable for writing to the provided `destination` with this format.
`GridCoverageWriter`	`getWriter(Object destination, Hints hints)` Call the accepts() method before asking for a writer to determine if the current object is supported.

Methods inherited from class AbstractGridFormat
equals, getDefaultCRS, getDescription, getDocURL, getName, getReadParameters, getVendor, getVersion, getWriteParameters

Methods inherited from class Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface Format
getDescription, getDocURL, getName, getReadParameters, getVendor, getVersion, getWriteParameters

- Field Detail
  - FILTER
```
public static final ParameterDescriptor<Filter> FILTER
```
    Filter tiles based on attributes from the input coverage
  - FADING
```
public static final ParameterDescriptor<Boolean> FADING
```
    Control the type of the final mosaic.
  - OUTPUT_TRANSPARENT_COLOR
```
public static final ParameterDescriptor<Color> OUTPUT_TRANSPARENT_COLOR
```
    Control the transparency of the output coverage.
  - MAX_ALLOWED_TILES
```
public static final ParameterDescriptor<Integer> MAX_ALLOWED_TILES
```
    Control the thresholding on the input coverage
  - DEFAULT_ARTIFACTS_FILTER_THRESHOLD
```
public static final ParameterDescriptor<Integer> DEFAULT_ARTIFACTS_FILTER_THRESHOLD
```
    Control the default artifact filter luminance thresholding on the input coverages
  - ARTIFACTS_FILTER_PTILE_THRESHOLD
```
public static final ParameterDescriptor<Double> ARTIFACTS_FILTER_PTILE_THRESHOLD
```
    Control the artifact filter ptile thresholding
  - VIRTUAL_NATIVE_RESOLUTION
```
public static final ParameterDescriptor<double[]> VIRTUAL_NATIVE_RESOLUTION
```
    Defines a virtual native resolution. It virtually represents the native resolution to be used after reading a dataset before doing any other operation. It could be useful to limit somehow the data quality offered to the final user. As an instance if we have data at resolutions 0.5m, 1m, 2m, 4m, 8m and the virtual native resolution is 4m, and the request is looking for data at 2m resolution we should downsample the best nearest level to 4m and then get back at 2m. This will result in potentially pixellated output. When specified, values should be always positive.
  - ALLOW_MULTITHREADING
```
public static final ParameterDescriptor<Boolean> ALLOW_MULTITHREADING
```
    Control the threading behavior for this plugin.
  - BACKGROUND_VALUES
```
public static final ParameterDescriptor<double[]> BACKGROUND_VALUES
```
    Control the background values for the output coverage
  - INTERPOLATION
```
public static final ParameterDescriptor<Interpolation> INTERPOLATION
```
    Control the interpolation to be used in mosaicking
  - ACCURATE_RESOLUTION
```
public static final ParameterDescriptor<Boolean> ACCURATE_RESOLUTION
```
    Control the requested resolution calculation.
  - OUTPUT_TO_ALTERNATIVE_CRS
```
public static final ParameterDescriptor<Boolean> OUTPUT_TO_ALTERNATIVE_CRS
```
    When this read parameter is set to true, the reader will produce output in the requested CRS, assuming it matches one of the native CRSs, as reported by the #GridCoverage2DReader@MULTICRS_EPSGCODES metadata entry, and that the requested grid geometry is expressed in said CRS. When set to false (default), then only the native CRS declared by #GridCoverage2DReader@getCoordinateReferenceSystem will be produced in output
  - SORT_BY
```
public static final ParameterDescriptor<String> SORT_BY
```
    Optional Sorting for the granules of the mosaic.
    
    It does work only with DBMS as indexes
  - MERGE_BEHAVIOR
```
public static final ParameterDescriptor<String> MERGE_BEHAVIOR
```
    Merging behavior for the various granules of the mosaic we are going to produce.
    
    This parameter controls whether we want to merge in a single mosaic or stack all the bands into the final mosaic.
  - EXCESS_GRANULE_REMOVAL
```
public static final ParameterDescriptor<ExcessGranulePolicy> EXCESS_GRANULE_REMOVAL
```
    Controls the removal of excess granules
    
    This parameter controls whether the mosaic will attempt to remove excess granules, that is, granules not contributing pixels to the output, before performing the mosaicking. This is useful only if granules are overlapping, do not enable otherwise.
  - GEOMETRY_MASK
```
public static final ParameterDescriptor<Geometry> GEOMETRY_MASK
```
    mask (as a polygon in native coordinates) to be applied to the produced mosaic. At the moment, it will be ignored in case of Heterogeneous CRS.
  - MASKING_BUFFER_PIXELS
```
public static final ParameterDescriptor<Double> MASKING_BUFFER_PIXELS
```
    Control the Masking buffering (in raster size)
  - SET_ROI_PROPERTY
```
public static final ParameterDescriptor<Boolean> SET_ROI_PROPERTY
```
    Control whether to set the ROI property in the output mosaic (as an instance, even when background values are set which usually results into setting a null ROI after the mosaic)
- Constructor Detail
  - ImageMosaicFormat
```
public ImageMosaicFormat()
```
    Creates an instance and sets the metadata.
- Method Detail
  - getReader
```
public ImageMosaicReader getReader(Object source)
```
    Description copied from class: AbstractGridFormat
    
    Gets a GridCoverageReader for this format able to create coverages out of the source object.
    In case this Format cannot reader the provided source object null is returned.
    
    Specified by:
    
    getReader in class AbstractGridFormat
    
    Parameters:
    
    source - The source object to parse.
    
    Returns:
    
    A reader for this Format or null.
    
    See Also:
    
    org.geotools.data.coverage.grid.AbstractGridFormat#getReader(Object)
  - getWriter
```
public GridCoverageWriter getWriter(Object destination)
```
    Description copied from class: AbstractGridFormat
    
    Retrieves a GridCoverageWriter suitable for writing to the provided destination with this format.
    In case no writers are available null is returned.
    
    Specified by:
    
    getWriter in class AbstractGridFormat
    
    Parameters:
    
    destination - The destinatin where to write.
    
    Returns:
    
    A GridCoverageWriter suitable for writing to the provided destination with this format.
  - accepts
```
public boolean accepts(Object source,
                       Hints hints)
```
    Description copied from class: AbstractGridFormat
    
    Tells me if this Format can read the provided input.
    
    Specified by:
    
    accepts in class AbstractGridFormat
    
    Parameters:
    
    source - The input object to test for suitability.
    
    hints - Hints to control the accepts internal machinery.
    
    Returns:
    
    True if this format can read this object, False otherwise.
  - accepts
```
public boolean accepts(Object source)
```
    Description copied from class: AbstractGridFormat
    
    Tells me if this Format can read the provided input.
    
    Overrides:
    
    accepts in class AbstractGridFormat
    
    Parameters:
    
    source - The input object to test for suitability.
    
    Returns:
    
    True if this format can read this object, False otherwise.
    
    See Also:
    
    org.geotools.data.coverage.grid.AbstractGridFormat#accepts(Object input)
  - getReader
```
public ImageMosaicReader getReader(Object source,
                                   Hints hints)
```
    Description copied from class: AbstractGridFormat
    
    Gets a GridCoverageReader for this format able to create coverages out of the source object using the provided hints.
    In case this Format cannot reader the provided source object null is returned.
    
    Specified by:
    
    getReader in class AbstractGridFormat
    
    Parameters:
    
    source - The source object to parse. *
    
    hints - The Hints to use when trying to instantiate this reader.
    
    Returns:
    
    A reader for this Format or null.
    
    See Also:
    
    AbstractGridFormat.getReader(Object, Hints)
  - getDefaultImageIOWriteParameters
```
public GeoToolsWriteParams getDefaultImageIOWriteParameters()
```
    Throw an exception since this plugin is readonly.
    
    Specified by:
    
    getDefaultImageIOWriteParameters in class AbstractGridFormat
    
    Returns:
    
    nothing.
  - getWriter
```
public GridCoverageWriter getWriter(Object destination,
                                    Hints hints)
```
    Description copied from class: AbstractGridFormat
    
    Call the accepts() method before asking for a writer to determine if the current object is supported.
    
    Specified by:
    
    getWriter in class AbstractGridFormat
    
    Parameters:
    
    destination - the destination object to write a WorldImage to
    
    hints - Hints to control the internal machinery.
    
    Returns:
    
    a new WorldImageWriter for the destination

Class ImageMosaicFormat

Field Summary

Fields inherited from class AbstractGridFormat

Constructor Summary

Method Summary

Methods inherited from class AbstractGridFormat

Methods inherited from class Object

Methods inherited from interface Format

Field Detail

FILTER

FADING

OUTPUT_TRANSPARENT_COLOR

MAX_ALLOWED_TILES

DEFAULT_ARTIFACTS_FILTER_THRESHOLD

ARTIFACTS_FILTER_PTILE_THRESHOLD

VIRTUAL_NATIVE_RESOLUTION

ALLOW_MULTITHREADING

BACKGROUND_VALUES

INTERPOLATION

ACCURATE_RESOLUTION

OUTPUT_TO_ALTERNATIVE_CRS

SORT_BY

MERGE_BEHAVIOR

EXCESS_GRANULE_REMOVAL

GEOMETRY_MASK

MASKING_BUFFER_PIXELS

SET_ROI_PROPERTY

Constructor Detail

ImageMosaicFormat

Method Detail

getReader

getWriter

accepts

accepts

getReader

getDefaultImageIOWriteParameters

getWriter