Compressed DLL files for Windows (Oct. 16, 2004)
xbit76_401.zip (617k) - XBIT 4.01 for Tcl7.6p2/Tk4.2p2
xbit80_401.zip (736k) - XBIT 4.01 for Tcl8.0.5/Tk8.0.5
xbit81_401.zip (737k) - XBIT 4.01 for Tcl8.1.1/Tk8.1.1
xbit82_401.zip (735k) - XBIT 4.01 for Tcl8.2.3/Tk8.2.3
xbit83_401.zip (733k) - XBIT 4.01 for Tcl8.3.5/Tk8.3.5 
xbit84_401.zip (733k) - XBIT 4.01 for Tcl8.4.5/Tk8.4.5 

Compressed libraries, documents, and bitmaps
xbitlib_401.zip (557k, Oct. 9, 2004) - Tcl script library, additional DLL files for XBIT 4.01 application
xbitdoc_401.zip (373k, Oct. 16, 2004) - XBIT 4.01 document, bitmap and startup and package script files 
proj-nad27.zip (2290k, Oct. 9, 2004) - Files required to do coordinate system conversion with nad2nad and cs2cs object

Compressed image files
imagery0.zip (354k, Dec. 23. 1999) - image files for XBIT demonstration
imagery1.zip (1864k, Sept. 1999) - additional image files for XBIT demonstration
imagery2.zip (898k, April 4, 2004) - image files for XBIT 4.01 demonstration

Download and installation
If you have not installed a TclTk, you may down load the TclTk package from  http://www.scriptics.com or ftp://ftp.scriptics.com/pub/tcl and install a TclTk package first.  You may also have to install the latest versions of Windows OpenGL and DirectX (version 7.0 or later).

Down load specific DLLs: Choose a TclTk version, down load one of the DLL files (xbit76_401.zip, xbit80_401.zip, xbit81_401.zip, xbit82_401.zip, xbit83_401.zip or xbit84_401.zip)

Down load general script libraries, bitmaps and documents: down load  xbitlib_401.zip (required), xbitdoc_401.zip (required), imagery0.zip (recommended), imagery1.zip (recommended) and imagery2.zip (recommended). 

XBIT 4.0 Installation: choose and create a XBit home directory, and unzip all the downloaded zip files in it. To run XBit, one may starts a command line in the XBit home directory, e.g.,

                      wish84 xbitInit.tcl 

The above command line will start an XBit console application. 

License
An XBit Software License Agreement file is included in the distribution for a free non-commercial use of XBit 4.01.  To use XBit 4.01 for commercial applications, an additional license option file is required. There are five different types of license option files: 

 1) Basic image processing options;
 2) Analytical image FFT processing options;
 3) GIS application options;
 4) Remote Sensing application options;
 5) Full options;

License option files define different XBit software products for different applications. Free-trial license option files are available upon request. No license option files is required for non-commercial use of XBit 4.0.  The distribution has all the functions specified in license option files 1 through 4, but is subject to the following restrictions:

Image dimension limits: 640 * 512
Image band number limits: 7
FFT image dimension limits: 256 * 256
OpenGL object item limits: 196608 (256 * 256 * 3)
GLM object vertex limits: 8192
XBit window widget (gcanvas, glw, ddw) size limits: 640 * 480
Gcanvas item limits: 1024

To request a free-trial license option file: A license option file is created and digitally signatured using a device-specific signature (DSS).  A user must provide DSS in order to create a license option file.  A user may run XBit command xbit.license dss to find a DSS and then send an e-mail to chengye.geo@yahoo.com with the DSS to request a free-trial license option file.  To simply this procedure, a user may invoke Help/License/Request A License Option File from the XBit console's help menu.

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