ITCILWISDownloadILWIS 3.31 Update

ILWIS 3.31 Update

ILWIS 3.31 Update

ILWIS 3.31 is released in June 2007. It is a service pack on ILWIS 3.3 Academic.

ILWIS 3.31 is the last service pack made available by ITC. With this, ILWIS 3.3 is enhanced with new functions and bugfixes that were developed after the release of ILWIS 3.3, but that were not yet made available as an official service pack. ILWIS 3.4 Open is derived from ILWIS 3.31; in ILWIS 3.4 Open, copyrighted components were removed in order to be able to offer it as open source software.



Make sure you are logged in as administrator!

  1. Download patch331.exe to a temporary directory
  2. Run the 3.31 patch to update ILWIS 3.3 Academic
  3. In the dialog "Locate system to update", locate your ILWIS 3.3 folder and click "Open"
  4. Click "Yes" in the Update dialog
  5. Confirm the location by clicking "Yes"

Hydrologic Flow Operations

Spatial Multiple Criteria Evaluation (SMCE)


Classify operation

Added spectral angle classifier.


Export to Shapefile now also exports the coordinate system to a .PRJ file.

Bug Fixes

Most important bug fixes in 3.31 are:

Registration code

ILWIS no longer requires a registration code to run.