Convert GMC to KAP

Understanding gmc and kap file formats

GMC files are typically associated with Global Mapper, a popular GIS (Geographic Information System) software. GMC files are Global Mapper Catalog files, which store references to multiple spatial data files, allowing users to manage and organize large mapping projects efficiently.

KAP files, on the other hand, are BSB Raster Chart files, commonly used for nautical charts. These files are widely supported by marine navigation software and devices, storing georeferenced raster images with metadata for navigation purposes.

Why convert gmc to kap?

Converting a GMC catalog to a KAP file is useful when you need to use your mapped data in marine navigation systems or share it with users who rely on BSB/KAP-compatible software. Since GMC is a project/catalog format and KAP is a raster chart format, the conversion process involves exporting the actual map data referenced in the GMC file to a georeferenced raster image and then encoding it as a KAP file.

How to convert gmc to kap

Direct conversion from GMC to KAP is not possible because GMC is a catalog, not a data file. You must first open the GMC file in Global Mapper, load the referenced layers, and then export the desired map area as a KAP file.

1. Open Global Mapper and use File → Open Data File(s)... to load your GMC file.
2. Ensure all desired layers are visible and properly georeferenced.
3. Select the area you want to export (if needed, use the Digitizer Tool to define an export area).
4. Go to File → Export → Export Raster/Image Format....
5. In the export dialog, choose BSB/KAP as the output format.
6. Configure export settings (resolution, area, etc.) and click OK to export.

The resulting KAP file can now be used in marine navigation software.

Best software for gmc to kap conversion

The most reliable tool for this conversion is Global Mapper itself, as it natively supports both GMC catalogs and KAP export. Alternative GIS software may not support GMC files or KAP export directly.

• Global Mapper (Windows): Comprehensive GIS tool with direct KAP export support.

For batch conversions or automation, consider using Global Mapper's scripting capabilities.

Summary

To convert a GMC catalog to a KAP file, use Global Mapper to open the GMC, load the data, and export the desired map area as a KAP file via File → Export → Export Raster/Image Format.... This ensures your spatial data is ready for marine navigation applications.