What's New?

2017.8.28 Version

Windows Version

A problem was fixed with the file filter feature in the open and save file dialog boxes.

Note that this problem did not affect the Macintosh version. The 2017.8.25 Macintosh version is still the latest one.

2017.8.25 Version

Macintosh and Windows Versions

File->Open Image

MultiSpec will recognize Sentinel MSI data. If one uses open image, then selects a set of the Bnn files in the IMG_DATA folder, the like spatial resolution files will be linked together based on the spatial resolution of the first band in the selection. If one selects bands 1 through 12, the linked set will include the 3 60-meter bands. If one selects 2 through 12, the linked set will include the 4 10-meter bands. If one selects 5 through 12, the linked set will include the 6 20-meter bands. Spectral descriptions will be assigned to each band.

If one then uses the Processor->Reformat->Change Image File Format processor to create a GeoTIFF image, the default output file name will include the spatial resolution to differentiate the output file from others; e.g. _60m is at the end of the file name for the 3 60-meter band file.

Processor->Utilities->Create Statistics Image

This processor is now available in the Windows version.

One statistics image is now created for all of the project classes instead of one file for each class. It is now easier to visually compare the class correlation matrices.

Macintosh Version

A fix was made so that the projection information in jpeg2000 images will be read. This error was caused by creating an Intel only version last May in place of a combined Intel/Power PC version.

Windows Version

A fix was made so that the values entered in some of the fields in dialog boxes would be handled correctly. The error occurred only in specific situations. An example of this was defining a user range of thematic image values in the Display processor for 1-channel thematic display for a ndvi image. If the range entered was 0 to .7, the range used was 7 to .7. If one used 0. to 7, then all worked correctly. This issue could happen in other dialog boxes also. Microsoft has an error in one of their libraries beginning with Visual Studio 2015 which we started using in the May version.

As mentioned above the Create Statistics Image processor is now available. The Windows version now contains all of the processors that the Macintosh version does.

2017.5.24 Version

Macintosh and Windows Versions


One can now select a layer (or channel) in a file to define a training or test mask. For example one can select channel 4 in a png file where channel 4 represents the alpha (or mask) layer. In prior versions one was limited to just the first layer (or channel) in the selected file.

Processor->Cluster and Processor->Classify

Image file overlays for training and test classes defined by a mask file work correctly.

Macintosh Version

Code was reorganized so that the limit of 500 files can be linked.

Windows Version

The application is now generated with Visual Studio Community 2015 (instead of version 2008).

The Windows version can now read the ecw file format again. This capability was lost in the conversion to UNICODE.

The BiPlot processor is now available.

Image file overlays for classes defined by mask files will now display like they do in the Macinstosh version. The base image not covered by the mask will not be covered by black. The transparency value defined in the image overlay option box is now used for the image overlays.

2017.3.29 Version

Windows Version

An error was fixed which caused the class list in the select mode of the Project window to be 'scrambled'.


2017.3.28 Version

Macintosh and Windows Versions

An error was fixed which caused MultiSpec to crash when saving ECHO classification homogenous fields which had more than 256 classes.

Macintosh Version

An error was fixed which cause the dialog box to go into a race condition when a popup menu was displayed upon a selection in the dialog box.

Windows Version

An error was fixed which caused the histogram information to be lost when changing the display type for an image window.


2017.3.25 Version

Macintosh and Windows Versions

The primary change in this version is the ability to handle non-Roman characters in the path and file names. It has not been tested though with a wide range of non-Roman characters. Let me know if you find problems. The previous (2016) versions are still easily available in case you are not able to work with this version.

Windows Version

The windows version is now a 64-bit application.


2016.2.8 Version

Macintosh and Windows Versions

File->Open Image

MultiSpec now handles NASA's Planetary Data Systems (PDS) formatted data such as that from the MARS rovers. One can select either the .img or the associated .lbl files to open the image.

MultiSpec now also handles a wider range of ENVI formatted image files.


In response to a couple of requests, the Mahalanobis classifier has been added as an option to the classify processor. This classifier is very similar to the quadratic likelihood classifier.

Macintosh Version

Note a user has indicated that they have a problem when trying to open a dropbox folder on a laptop. The cursor starts spinning and never stops. They can open the same dropbox folder on a desktop with no problem. I have not been able to debug the cause of this. Let me know if you have similar issues accessing dropbox folders from within the Mac version of MultiSpec.

Windows Version

Some users have reported that they are having problems accessing files in folders whose names contain cyrillic characters since the 2012 versions of MultiSpec. This issue has been traced to the usage of the gdal library to read tif formatted files. A second version of MultiSpec is being made available for those users which does not use the gdal library to read tif formatted files. However, one gives up the ability to read compressed tif files with this version. Hopefully this issue can be resolved in a later version of MultiSpec using a new version of the gdal library.


2015.2.12 Version

Macintosh and Windows Versions


In response to requests for a version of MultiSpec with fewer menu options for use in K-12 settings, this version has the capability to allow only the menu options for basic capabilities to be available. One controls this by:

Macintosh version: hold the control key down before selecting the MultiSpec->About MultiSpec... menu item

Windows version: hold the ctrl key down before selecting Help->About MultiSpec... menu item

Then select the "Simpler Version of MultiSpec" check box.

The setting will be saved so that when one closes MultiSpec and starts MultiSpec later, the last setting of "Simpler Version" will be used. Note that if the Windows version of MultiSpec is moved without the associated INI file, MultiSpec will default back to the full version.

The simpler version does not have the ability to create projects and run supervised classifications. One can still run unsupervised (cluster) analyses but the results will not be saved to a project.

This is not a perfect solution to this request, but it does allow users to try it out and provide feedback on it.


Change was made for better default names for cluster mask files.

Macintosh Version


This version includes an official Apple Developer certificate which "signs" the application as one from a known developer. One should not get warnings about an unknown developer and have to go through the process of moving the downloaded MultiSpec application out of quarantine on the more recent versions of OSX. Let me know if you still have problems with this warning.

Also note that the Macintosh version that is now downloaded will only run on Intel-based Macintosh platforms. One can still download a version that will run on older PowerPC platforms by selecting the "Archive Versions" link on the Download MultiSpec for Macintosh page.


2014.12.17 Version

Macintosh and Windows Versions

Menu Bar

The Options->Palette menu item was removed. This was originally included for testing. Decision made that it was not useful to continue to have.

Edit->Map Parameters

A change was made to correct for situations when images from the southern hemisphere are UTM but the falsing northing is set to 0 in the file instead of 10,000,000. The original code (and applications like ENVI, Imagine, ArcGIS) would indicate that the data was from the northern hemisphere. The latitude and longitude calculations would still be correct, however.

Corrected problem with images that have model tie points and other parameters were changed and saved. The upper left corner location was being changed.

Made changes so that geotiff images with tie points which had longitudes defined by 0 to 360 degree range would be handled properly.


Fixed problem in which the legends for 1-channel thematic displays were not being updated properly when changes were made.


Change made to handle situation where ERDAS Imagine formatted files do not contain the image statistics. The statistics will be computed and saved to/read from ERDAS .sta files.

Corrected situation where the standard deviation would be listed incorrectly for signed data values if the image statistics were read from a .sta file.

Processor->List Data

Changes were made so that large data values would be listed correctly.

Processor->Reformat->Change Image File Format

Modified settings for header format options in the dialog window.


Change was made in procedure to determine the initial clusters for Isodata to handle the situation where the data values have a very limited range (such as 12-13) plus a no_data value. Intial clusters will now be generated.

Fixed a problem in which the default single pass threshold values were very large negative numbers for some situations.

Made a change so that the default colors loaded into the tiff formated cluster mask files would be the same as those saved in the associated .clr files.


Corrected problem when generating default names for classes created from a mask file. For some situations the last class would be random characters.


Probability files in TIFF format now have .clr type associated files which contain the colors, class names and grouping information. Probability map files in ERDAS GIS format have the normal .trl type associated files.

Better handling of cases where one the covariance matrix for one of the classes cannot be inverted. The classifier will now cancel the classification if any of the classes have ill formed covariance matrices.


2014.3.22 Version

Macintosh and Windows Versions

File->Open Image

A change was made so that Landsat 4 files will be handled correctly when selecting all of them to be linked together as a single file similar to the process for Landsat 5 data files.

The ability to read the meta data in the Land Information System (LIS) netcdf files was added so that the projection information could be obtained along with the fill data value.

Edit->Image Description

A new parameter was added to the image description dialog window to allow one to view and/or enter the 'no data' or 'fill data' value for the scene. This parameter is read from the file when available. The data value is also saved in output geotiff image files. The information is written in the geotiff tag that gdal has defined; therefore it can be read by packages that use gdal.

The statistics that are computed for classes will ignore these data values. You can turn this affect off by turning off the check box for the 'no data' values in this dialog window.

One can hold the shift key down when selecting a grouped data set in hdf4, hdf5 or netcdf files to indicate that only the selected data set is to be used. (Grouped data sets are indicated by the _Gn suffex.) One will notice that only one data set is selected by observing that the number of channels for the selection will change to 1.

Processor->Reformat->Change Image File Format

Changes were made to keep settings of data type, band interleave, header format and output file in better sync with what is possible for the selected file format. For example one cannot have a tiff/geotiff file which is band interleaved by line.

Processor->Reformat->Convert Project Fields to Thematic Image File

The capability was added so users can save the output thematic image files as either geotiff files or ERDAS .gis files.


The Mosaic processor is now available in the Windows version.

Also a new feature was added to allow one to mosaic two images top to bottom. This processor was originally created to allow one to mosaic two Landsat quad scene together side by side ... way back when Landsat data were distributed as 4 separate quad scenes. The ability to combine two image file top and bottom is much more flexible than the append-to option in Reformat->Change Image File Format processor. One can combine images with different band interleave formats, data types and file header formats. The top - bottom capability was added so that users have an easy way to combine two granules of MODIS NDVI data that one obtains from the USGS glovis site.


A correction was made so that the statistics in a project generated by a cluster operation could be used for supervised classification, listing statistics, etc. This error was created by changes a couple of versions back.


A change was made to correct a problem which a user found when creating a classification matrix using a project file with more than 2600 training fields. Also a correction was made in the Windows version so that the labels in the drop down menu for the output format choices would be correct; geotiff was being written in the wrong place.

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