Raster Navigational Charts (RNC's) are created by the National Oceanic and Atmospheric Administration (NOAA) of the United States Government. Each original chart is scanned at high resolution with color separate overlays. The raster file also contains data that is Geo-referencing; enabling computer based navigation attached to a GPS to locate and display the chart.

The charts are stored in BSB format. "[The BSB file format] is a proprietary format of BSB Electronic Charts, LLP (bought by MapTech, Inc.)."[1] Image manipulation tools such as GDAL can read the image information, but there also is georeferenced data in the navigational charts.

See also

References

  1. ↑ "Nautical Chart Viewer Frequently Asked Questions" (PDF). p. 3. Retrieved 2023-08-11.
  • US patent 5727090, Yellin; Martin J., "Method of storing raster image in run lengths having variable numbers of bytes and medium with raster image thus stored", issued 1998-03-10, assigned to United States of America as represented by the Secretary of Commerce 
  • NOAA RNC Charts Viewer


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.