GeoExpress - Knowledge Base Articles

A071101 - GeoExpress View by ILS does not properly export geocoordinates

Products:

GeoExpress View by ILS (Third Party)

Summary:

GeoExpress View by ILS cannot read and export the proper coordinates for a MrSID file without a world file.

Solution:

Use LizardTech’s free GeoViewer application to view MrSID images. LizardTech GeoViewer exports to GeoTIFF, PNG and JPEG with an option to create world files.

To install GeoViewer:

1. Navigate to http://www.lizardtech.com/download/dl_options.php?page=viewers.
2. Click GeoViewer to expand it.
3. Click the Windows link, then follow instructions for easy download and installation.

While we strongly recommend using LizardTech GeoViewer, you can also create world files for MrSID files using MrSID Geoinfo, one of a suite of free LizardTech command line tools.

To use MrSID Geoinfo:

First, install MrSID Geoinfo:

1. Navigate to http://www.lizardtech.com/downloads/category/#tools__utilities.
2. Click GeoExpress Command Line Utilities to expand it.
3. Click Windows, Linux or Solaris and follow instructions to download and extract the zipped file.
4. Add the folder to your PATH environment variable. On Windows 7:
   • Right-click My Computer and choose Properties.
   • Click Advanced system settings. The System Properties dialog appears.
   • On the Advanced tab, click Environment Variables.
   • Select the PATH variable and click Edit. Add a semi-colon and the path to MrSID Geoinfo at the end of the variable’s value. For example:

     <previous_path_entry>;< previous_path_entry>;C:/Program Files/LizardTech/GeoExpressCLUtils-8.5.0.3330/bin/mrsidgeoinfo

Next, use MrSID Geoinfo on the command line to generate world files for all MrSID files in a folder as follows:

1. Click Run from the Start menu and enter “cmd“
2. On the command line, enter the following:

   cd "C:<path_to_folder_where_MrSID_files_live>" FOR %a IN (*.sid) DO mrsidgeoinfo %a –wf

This article was last updated or verified on 14 January 2013.