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    by David Crowther

    QGIS_Merge_Raster_DC_01.png

    Question:

    Is it possible to Merge Raster Tiles in QGIS?

    Answer:

    Yes, if you have 2 or more individual raster tiles, you can use the Raster > Merge command to merge the tiles into one new image.

    QGIS_Merge_Raster_DC_02.jpg

    From the Raster menu, choose Merge:

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    In the Input Layers panel choose the tiles to Merge, by ticking them one by one or choosing Select All.

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    Once you have chosen the tiles, choose Run.

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    The merge will run and show you both merged raster tiles as one image in the map window.

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    And the result will be added in the Layers list, but note that it is only a scratch layer available in this current project only.

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    However if you choose an output file name – this will save the image as a new .tif file,  or any other raster format.

    QGIS_Merge_Raster_DC_09.jpg

    If you now run the Merge, it will create the merged raster as a new image file.

    QGIS_Merge_Raster_DC_10.jpg

    You may notice that the output merge tile has a different colour palette to the input tiles.

    QGIS_Merge_Raster_DC_11.jpg

    To adjust the colour, choose the layer properties for the merged tiles > choose symbology > and change the Band Rendering > Render Type from Multiband colour….

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    To be Single pseudocolour.

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    Once applied, the merged tile now looks the same as the individual raster tiles.

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