# ls -la
-rw-r--r--  1 root root       2670 Nov 11 10:42 MXAC_20191111_092600_2_map.png
-rw-r--r--  1 root root         99 Nov 11 10:42 MXAC_20191111_092600_2_map.wld

# gdal_translate -co compress=lzw -of Gtiff -a_srs EPSG:3857 MXAC_20191111_092600_2_map.png MXAC_20191111_092600_2_map.tiff
Input file size is 652, 643
0...10...20...30...40...50...60...70...80...90...100 - done.

# gdalinfo MXAC_20191111_092600_2_map.tiff
Driver: GTiff/GeoTIFF
Files: MXAC_20191111_092600_2_map.tiff
Size is 652, 643
Coordinate System is:
PROJCS["WGS 84 / Pseudo-Mercator",
    GEOGCS["WGS 84",
        DATUM["WGS_1984",
            SPHEROID["WGS 84",6378137,298.257223563,
                AUTHORITY["EPSG","7030"]],
            AUTHORITY["EPSG","6326"]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4326"]],
    PROJECTION["Mercator_1SP"],
    PARAMETER["central_meridian",0],
    PARAMETER["scale_factor",1],
    PARAMETER["false_easting",0],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["X",EAST],
    AXIS["Y",NORTH],
    EXTENSION["PROJ4","+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs"],
    AUTHORITY["EPSG","3857"]]
Origin = (-11633496.373428674414754,2404880.429133014287800)
Pixel Size = (1621.142941106099897,-1621.142941106099897)
Metadata:
  AREA_OR_POINT=Area
Image Structure Metadata:
  COMPRESSION=LZW
  INTERLEAVE=BAND
Corner Coordinates:
Upper Left  (-11633496.373, 2404880.429) (104d30'19.71"W, 21d 6'32.40"N)
Lower Left  (-11633496.373, 1362485.518) (104d30'19.71"W, 12d 8'50.56"N)
Upper Right (-10576511.176, 2404880.429) ( 95d 0'37.50"W, 21d 6'32.40"N)
Lower Right (-10576511.176, 1362485.518) ( 95d 0'37.50"W, 12d 8'50.56"N)
Center      (-11105003.775, 1883682.974) ( 99d45'28.61"W, 16d40'50.36"N)
Band 1 Block=652x25 Type=Byte, ColorInterp=Palette
  NoData Value=0
  Image Structure Metadata:
    NBITS=4
  Color Table (RGB with 16 entries)
    0: 0,0,0,0
    1: 22,22,22,255
    2: 42,42,42,255
    3: 45,45,45,255
    4: 50,50,50,255
    5: 55,55,55,255
    6: 60,60,60,255
    7: 65,65,65,255
    8: 70,70,70,255
    9: 75,75,75,255
   10: 80,80,80,255
   11: 0,0,0,255
   12: 0,0,0,255
   13: 0,0,0,255
   14: 0,0,0,255
   15: 0,0,0,255