US 11,869,222 B2
Geospatial data abstraction library (GDAL) conversion tool for data compression
Robert E. Mullen, Bloomington, IN (US); and James A. Hammack, Huntsville, AL (US)
Assigned to The United States of America, as Represented by the Secretary of the Navy, Washington, DC (US)
Filed by The United States of America, as represented by the Secretary of the Navy, Crane, IN (US)
Filed on Mar. 10, 2022, as Appl. No. 17/691,712.
Claims priority of provisional application 63/159,022, filed on Mar. 10, 2021.
Prior Publication US 2022/0292729 A1, Sep. 15, 2022
Int. Cl. G06T 9/20 (2006.01); G06T 7/90 (2017.01); G06V 20/13 (2022.01)
CPC G06T 9/20 (2013.01) [G06T 7/90 (2017.01); G06V 20/13 (2022.01); G06T 2207/10032 (2013.01); G06T 2207/30181 (2013.01); G06T 2207/30184 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for compressing map image data, the method comprising:
setting all pixels in the map image data having a pure black value of zero to a plus one value;
setting map border pixels of the map image data having a value less than a predetermined value to a value of zero;
setting the map border pixels of the map image data previously set to value of zero to a no data designation;
compressing the map image data using at least one predetermined compression scheme to create compressed map image data; and
translating the compressed map image data to a joint photographic experts group (JPEG) image formatted map image file.