XCH files are color composite images made from the combination of input images as seen through red, green, blue and, optionally, alpha filters. These files are basically XML files that need to be created manually. The Raster Manager supports this format.

Following are examples of what XCH files contain:

RGB example:

<MultiChannelImageFileFormat>
    <VERSION>1.0</VERSION>
    <CHANNELS>
        <COUNT>3</COUNT>
        <RED>red.itiff</RED>
        <GREEN>green.itiff</GREEN>
        <BLUE>blue.itiff</BLUE>
    </CHANNELS>
</MultiChannelImageFileFormat>

RGBA example:

<MultiChannelImageFileFormat>
    <VERSION>1.0</VERSION>
    <CHANNELS>
        <COUNT>4</COUNT>
        <RED>red.itiff</RED>
        <GREEN>green.itiff</GREEN>
        <BLUE>blue.itiff</BLUE>
        <ALPHA>alpha.itiff</ALPHA>
    </CHANNELS>
</MultiChannelImageFileFormat>