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A simple method that does not need programming is to digitize the area of "small" into vector file as a polygon and then burn it into the image with gdal_rasterize http://www.gdal.org/gdal_rasterize.html If the small image is rectangular without nodata regions you can get the mask shapefile with gdaltindex http://www.gdal.org/gdaltindex.html gdaltindex ...


Ciao, in the latest versions of GeoServer you can use the REST api to ingest additional granules. ImageMosaic would not pick up new images automatically, but you could use the REST api to automate this. You can check this link for additional information. Hope this helps.


The image mosaic plugin holds the information about the tiles/images in an index which is either a shapefile or a database. To make the new images show up you need to update the index. This is tricky if you are using the default shapefile but easy if you are using postgis. For postgis you just issue an SQL insert statement with the name, location and bounds ...


I think this guide will help you. It shows you how to turn a large geotiff into map tiles for use with leaflet.

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