GeoJpeg

GeoJpeg is an utility to convert, scale, and export the selected portion of "Geo Referenced" Tiff images into "Geo Referenced" Jpeg images.

Environment

This utility requires the latest Java SE virtual machine installed on your systems. If you don't the required environment, please download & install Java SE virtual machine now.

Input Geo Tiff Files

The input files need to be a pair of ".tif" image file and ".tfw" world file.

Output Geo Jpeg Files

The output files will be a pair of ".jpg" image file and ".jgw" world file.

Functions:
  • Open : Open a "Geo Referenced" Tiff image.
  • Show : Show image.
  • Select : Select a portion of image.
  • Clear : Clear the selection.
  • Export Scale : Set the exported image scale (1% - 100% of iamge width or height).
  • Export Full : Export the full image.
  • Export Select : Export the selected portion of image.
  • Exit : Exit the program.
Screen Information:
  • Map Coordination : The upper left conner displays the image coordination information of the current mouse pointer.
  • Export Scale : The upper right conner displays the current export scale.
  • Selection Box : There is an example selection box displayed in the middle of image.

Demonstarions:


Notes:
  • Basically, the term "GeoJpeg" image used in JShape or JShapeView is quite misleading. Unlike GeoTiff file format which includes the map coordinates in the tags of the same Tiff image file, the so-called "GeoJpeg" image used in JShape or JShapeView contains a pair of image and world files.

  • The GeoJpeg utility can only read "Geo-Referenced Tiff" images (which contain pairs of image and world files). The GeoJpeg utility can not read GeoTiff images (which the map coordinates and image are in the same file) directly.

  • The exchanges of "Geo-Referenced Tiff" and "Geo-Referenced Jpeg" files are quite strait forward :
    • Use the any image tools to convert the image files : Tiff image Jpeg Image
    • Rename the world file extensions : ".tfw" ".jgw"


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