Up to 9 point calibration built-in
Specific calibration methods for each map projection for better accuracy
Various calibration methods can be used for the particular
map projection. For example, 2 calibration points can be used when
the Latitude/Longitude lines run parallel to the edges of the screen for
The 3 point method and the 4,5,6 point method uses
variations of an affine transformation to calculate the calibration
coefficients. This method will work with maps which are rotated or
For maps which are rotated or skewed and have a large
curve in the Lat/Lon or Grid lines, the 7 or more point method has the
option of using a polynomial transformation.
Special import for map formats containing geo-reference information
Digital Raster Graphics (DRG) maps - USGS DRG raster maps
provided by the USA government but can also be used to import any of the
supported map image types (TIF, BMP, PNG, JPG) which have at least a (.TFW)
Geotiff images (geo-referencing data is embedded within the
image file) - OziExplorer has various levels of importing these maps and
will try to select the method which has the most information to give the
best calibration and other parameters.
BSB charts (also NOS/GEO charts) - import single charts or
you can import all the BSB Charts from a CD in a single import process. The
geo-referencing information contained in the BSB file will be used by
OziExplorer to calibrate the chart.
Maptech PCX or RML charts - import multiple charts from a
Maptech CD in a single import process.
ECW images can have geo-referencing included within the image
header, if this information is included then the images can be imported and
calibrated by OziExplorer.
Zoom window to assist manual calibrations