Fixed geotransformation of geotiff images
Fixed geotransformation of geotiff images

basically, when viewed in a GIS app (such as Google Earth), the image was mirrored over the x-axis


Former-commit-id: 07513e204927d328ff96a0991f677c169c2dcdb2 [formerly 07513e204927d328ff96a0991f677c169c2dcdb2 [formerly f2d2626a54fdf416e12e61bbd36ed576302121a6]]
Former-commit-id: 2733da5099ea6087ff0eaf79a5b1475b6de28fa9
Former-commit-id: 423fda73a3533965566219479cf7039b4c18cba7
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine