Georeference Preferences – Avenza Systems

prefs_georeference

Default external reference format	Lists supported reference file formats (excluding GeoTIFF). When multiple reference files are found in the same directory, the Reference File Ambiguity dialog box appears.
Open/New: use internal format if available	This option overrides the chosen default external reference format when any internal reference is detected. This option is checked by default.
Format change: use internal format if available	This option overrides the chosen Default Reference Format when any internal reference is detected. This option is checked by default.
GeoTIFF: pixel registration method	When saving a GeoTIFF, keep existing pixel reference point of current image or override by choosing: Pixel-As-Area (upper left corner) or Pixel-As-Point (center of the pixel)

The default external reference formats are World, MapInfo TAB, Blue Marble Reference, and ERS.

When multiple reference files are found in the same directory, the Reference File Ambiguity dialog box will appear and will list the multiple reference files. The default reference format will be selected in the list. Clicking the Always use the default reference format if available check box will prevent the Reference File Ambiguity dialog box from appearing again and ensure that the default reference format is used.

information Only reference files with the same name as the image are listed in the Reference File Ambiguity dialog box. Reference files with a different name than the associated image will have to be specified manually.

When the Open/New: use internal format if available check box is checked, Geographic Imager uses any internal reference files (such as GeoTIFF) as the default and overrides the format from the Default external reference format drop-down list. When georeferencing an image, the format chosen in the Default external reference format drop-down list will be created.