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qmt_map2jnx - Man Page

convert map to JNX


qmt_map2jnx -q <1..100> -s <411|422|444> -p <0..> -c "copyright notice" -m "BirdsEye" -n "Unknown" -x file1_scale,file2_scale,...,fileN_scale <file1> <file2> ... <fileN> <outputfile>


qmt_map2jnx is a helper utility for qmapshack(1) to convert a map to JNX format.

The projection of the input files must have the same latitude along a pixel row. Mecator and Longitude/Latitude projections match this this property. Transversal Merkator or Lambert projections do not.

To rectify a geotiff map, you can use the gdalwarp command, e.g.

gdalwarp -t_srs "EPSG:4326" <inputfile> <outputfile>

Scale levels must be pass in same order as level files pointed. Empty and zero values equal to autodetect. We can point only needed levels, like:

-x 45356,,,75; -x ,,,,75

Calculated levels table can be found:

Most common values for different map scales:

JNX scale              Map scale
-------------          ---------
78125-31250            1:1 000 000
20834-7813             1:500 000
7813-3125              1:200 000
3125-2084              1:100 000
2084-782               1:50 000
782-32                 1:25 000
32-21                  1:10 000
21-14                  1:5000, 1:2000



The JPEG quality from 1 to 100. Default is 75


The chroma subsampling. Default is 411

The product ID. Default is 0

The copyright notice. Default is "Unknown"

The subscription product name. Default is "BirdsEye"

The map name. Default is "Unknown"


The z order (drawing order). Default is 25


Override levels scale. Default: autodetect

See Also



qmt_map2jnx was written and is currently maintained by Oliver Eichler <oliver.eichler@gmx.de>.


Jan 2018