BSB Marine Chart

The Export BSB Marine Chart command allows the user to export any loaded raster, vector, and elevation grid data sets to a palette-based (up to 127 colors) BSB marine chart raster image for use in compatible applications and some marine chart plotters. The export will generate a single KAP file containing the chart image.

When selected, the command displays the BSB Export Options dialog which allows the user to setup the export. The dialog consists of a General options panel which allows the user to set up the pixel spacing and chart parameters, a Tiling Panel, and an Export Bounds panel which allows the user to set up the portion of the loaded data they wish to export.

BSB Options

Metadata and Parameters

Chart Name

Specify the chart name to be included in the metadata

Chart Number

Specify the chart number to be included in the metadata

Edition Date

Specify the edition date for the raster chart

Chart Scale

Specify the chart scale. Use 0 to automatically determine the scale based on the sample spacing and image size.

Depth Units

Specify the depth and height units


Specify the dots per inch of the image.


Specify the color palette to use in the chart.

Sample Spacing

The Sample Spacing section allows the user to select the grid spacing to use when generating the file. The default value is the average of the grid spacings of all the currently loaded raster and elevation overlays.

If the Always Generate Square Pixels option is checked, the smaller of the specified x and y resolutions will be used for both the x and y resolution.

Selecting Always Generate Square Pixels ensures that the resultant image file will look good even in software that is not able to deal with pixels that aren't square.

To specify the spacing in units other than those of the currently selected view/ export projection, press the Click Here to Calculate Spacing in Other Units button.

Additional Options

Save Scale/Elevation Legend/ Grid if Displayed

Check this option to include displayed map elements in the export. These are enabled from Configuration Display Options

Save Vector Data if Displayed

ADVANCED: Include Polynomial Transform in KAP

Geographic Coordinates can be converted to pixel coordinates using polynomials. This is a high accuracy transformation method that not all chart reading programs utilize. The image position is the alternative spatial locating method. Check this option to include the polynomial transformation in the KAP file