cd /home/user
cp -R /usr/local/share/data/natural_earth2/ ./gdal_natural_earth

ls /home/user/gdal_natural_earth/HYP_50M_SR_W.*

convert /home/user/gdal_natural_earth/HYP_50M_SR_W.tif /home/user/gdal_natural_earth/HYP_50M_SR_W.png

display < /home/user/gdal_natural_earth/HYP_50M_SR_W.png

gdalinfo /home/user/gdal_natural_earth/HYP_50M_SR_W.tif

gdalinfo --formats

gdalinfo --format GTiff 

gdal_translate -of JPEG -co QUALITY=10 /home/user/gdal_natural_earth/HYP_50M_SR_W.tif /home/user/gdal_natural_earth/HYP_50M_SR_W.jpg

display < /home/user/gdal_natural_earth/HYP_50M_SR_W.jpg

gdal_translate -ot Int16 /home/user/gdal_natural_earth/HYP_50M_SR_W.tif /home/user/gdal_natural_earth/HYP_50M_SR_W_Int16.tif

gdalinfo /home/user/gdal_natural_earth/HYP_50M_SR_W.tif | grep Band

gdalinfo /home/user/gdal_natural_earth/HYP_50M_SR_W_Int16.tif | grep Band

gdal_translate -outsize 50% 50% /home/user/gdal_natural_earth/HYP_50M_SR_W.tif  /home/user/gdal_natural_earth/HYP_50M_SR_W_small.tif

gdalinfo /home/user/gdal_natural_earth/HYP_50M_SR_W.tif | grep Size

gdalinfo /home/user/gdal_natural_earth/HYP_50M_SR_W_small.tif | grep Size

gdalinfo -mm /home/user/gdal_natural_earth/HYP_50M_SR_W_small.tif | grep Min/Max

gdal_translate -scale_1 62.000 255.000 0 255.000 \
               -scale_2 85.000 255.000 0 255.000 \
               -scale_3 79.000 255.000 0 255.000 \
               /home/user/gdal_natural_earth/HYP_50M_SR_W.tif /home/user/gdal_natural_earth/HYP_50M_SR_W_scaled.tif

gdalinfo -mm /home/user/gdal_natural_earth/HYP_50M_SR_W_scaled.tif | grep Min/Max

gdal_translate -of JPEG -co QUALITY=40 /home/user/gdal_natural_earth/HYP_50M_SR_W_scaled.tif /home/user/gdal_natural_earth/HYP_50M_SR_W_scaled.jpg

display < /home/user/gdal_natural_earth/HYP_50M_SR_W_scaled.jpg

gdal_translate -srcwin 0 0 5400 5400 /home/user/gdal_natural_earth/HYP_50M_SR_W.tif  /home/user/gdal_natural_earth/west.tif
gdal_translate -srcwin 5400 0 5400 5400 /home/user/gdal_natural_earth/HYP_50M_SR_W.tif  /home/user/gdal_natural_earth/east.tif

gdal_translate -of JPEG -co QUALITY=40 /home/user/gdal_natural_earth/east.tif /home/user/gdal_natural_earth/east.jpg
gdal_translate -of JPEG -co QUALITY=40 /home/user/gdal_natural_earth/west.tif /home/user/gdal_natural_earth/west.jpg

gdaltindex /home/user/gdal_natural_earth/index_natural_earth.shp /home/user/gdal_natural_earth/*st.tif

gdalwarp -t_srs '+proj=merc +datum=WGS84' /home/user/gdal_natural_earth/HYP_50M_SR_W.tif /home/user/gdal_natural_earth/mercator.tif

convert /home/user/gdal_natural_earth/mercator.tif /home/user/gdal_natural_earth/mercator.png

display < /home/user/gdal_natural_earth/mercator.png

ogrinfo /home/user/gdal_natural_earth/index_natural_earth.shp index_natural_earth

echo 'MAP
  EXTENT -180 -89.999999999982 179.999999999964 90
  IMAGETYPE "png"
  NAME "simplepolygon"
  SIZE 600 600
  STATUS ON
  UNITS DD

  OUTPUTFORMAT
    NAME "png"
    MIMETYPE "image/png"
    DRIVER "AGG/PNG"
    EXTENSION "png"
    IMAGEMODE RGB
    TRANSPARENT TRUE
  END # OUTPUTFORMAT

  PROJECTION
    "proj=longlat"
    "datum=WGS84"
    "no_defs"
  END # PROJECTION

    LAYER
    DATA "/home/user/gdal_natural_earth/west.tif"
    EXTENT -180 -89.999999999982 -1.79596892913025e-11 90
    METADATA
      "ows_title"	"west"
    END # METADATA
    NAME "west"
    PROJECTION
      "proj=longlat"
      "datum=WGS84"
      "no_defs"
    END # PROJECTION
    STATUS ON
    TILEITEM "location"
    TYPE RASTER
    UNITS METERS
  END # LAYER

  LAYER
    DATA "/home/user/gdal_natural_earth/east.tif"
    EXTENT -1.79596892913025e-11 -89.999999999982 179.999999999964 90
    METADATA
      "ows_title"	"east"
    END # METADATA
    NAME "east"
    PROJECTION
      "proj=longlat"
      "datum=WGS84"
      "no_defs"
    END # PROJECTION
    STATUS ON
    TILEITEM "location"
    TYPE RASTER
    UNITS METERS
  END # LAYER
  
  LAYER
    DATA "/home/user/gdal_natural_earth/index_natural_earth.shp"
    EXTENT -180 -89.999999999982 179.999999999964 90
    NAME "index_natural_earth"
    PROJECTION
      "proj=longlat"
      "datum=WGS84"
      "no_defs"
    END # PROJECTION
    STATUS ON
    TILEITEM "location"
    TYPE POLYGON
    UNITS METERS
    CLASS
      NAME "/home/user/gdal_natural_earth/east.tif"
      EXPRESSION ("[location]" ="/home/user/gdal_natural_earth/east.tif")
      STYLE
        OPACITY 50
        COLOR 218 57 57
      END # STYLE
      STYLE
        OUTLINECOLOR 0 0 0
        WIDTH 0.26
      END # STYLE
    END # CLASS
    CLASS
      NAME "/home/user/gdal_natural_earth/west.tif"
      EXPRESSION ("[location]" ="/home/user/gdal_natural_earth/west.tif")
      STYLE
        OPACITY 50
        COLOR 18 211 14
      END # STYLE
      STYLE
        OUTLINECOLOR 0 0 0
        WIDTH 0.26
      END # STYLE
    END # CLASS
  END # LAYER
  
END # MAP' > index_natural_earth.map

shp2img -m index_natural_earth.map -i PNG -o index_natural_earth.png

display < index_natural_earth.png

#gdalwarp -t_srs EPSG:4326 -te -180.0000000 -90.0000000 180.0000000 90.0000000 /home/user/gdal_natural_earth/HYP_50M_SR_W.tif /home/user/gdal_natural_earth/HYP_50M_SR_W_geo.tif

#gdalinfo /home/user/gdal_natural_earth/HYP_50M_SR_W_geo.tif