After creating a mosaic of ASCII grid tiles I get rendering errors like this: 2017-10-06 15:17:58,128 DEBUG [org.geotools.gce.imagemosaic] - Loading level 0 with source region: java.awt.Rectangle[x=169,y=217,width=48,height=82] subsampling: 1,1 for granule:file:/data/os-data/panorama/data/nx/nx64.asc 2017-10-06 15:17:58,129 INFO [org.geotools.coverage.grid.io.imageio] - All factories fail for the operation "ImageRead" javax.media.jai.util.ImagingException: All factories fail for the operation "ImageRead" at javax.media.jai.OperationRegistry.invokeFactory(OperationRegistry.java:1687) see attached file for full log. Individual tiles load fine as ASCII grid stores |