GeoJPEG format
GeoJPEG is a widely supported raster format that has historically been widely used for aerial photography. While GeoJPEG has generally been supplanted by GeoTIFF, it is supported for both export and import by Koordinates.
GeoJPEG in your GIS
Section titled “GeoJPEG in your GIS”Because GeoJPEGs do not have projection information built into the file format, users will need to configure their GIS in order for them to display correctly. Also note that GeoJPEG does not support ‘NoData’ or transparency. This means that anything in the source data that is either ‘NoData’ or transparent is displayed as white. Users will need to alter this from within their GIS application.
Image quality of GeoJPEG
Section titled “Image quality of GeoJPEG”GeoJPEG is, broadly speaking, a ‘lossy’ format, which means that the quality of imagery exported to GeoJPEG will be less than the original source file. Koordinates configures GeoJPEG exports to ensure that they are 95% of the quality of the original, which means that they should be effectively identical for most users.
Multi-tile imports
Section titled “Multi-tile imports”Koordinates supports the import of multi-tile GeoJPEGs. Each JPEG needs a .jgw world file, and all the tiles must have the same projection and resolution.
Projection on import
Section titled “Projection on import”Because GeoJPEG doesn’t hold projection information, Koordinates can’t detect it on import unless you include a .prj file with each image. Otherwise, you’ll need to provide the projection as an EPSG code when you import.