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Software Updates

All recent Geosoft Desktop installs are available for you to download.

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Geosoft Viewer 9.5

December 6, 2018

A free, easy-to-use application that enables anyone to open, visualize, and integrate a variety of Geosoft formats and other geospatial data types.

Geosoft Viewer 9.5

The Geosoft Viewer is a new free, easy-to-use application that enables anyone to open, visualize, and integrate a variety of Geosoft formats and other geospatial data types. You can quickly and easily share your Geosoft files with colleagues and stakeholders who do not have a Geosoft subscription, allowing them to view and collaborate on projects. See more

Easily view geoscience data

Open common geoscience data formats and visualize the data as custom profiles, maps, and 3D views. The Geosoft Viewer supports many industry-standard file formats, including: Geosoft Maps (.map), Grids (.grd), Databases (.gdb), Voxels (.voxel), and 3D View files (.3dv).

Use the Geosoft Viewer to view geoscience data

Use the Geosoft Viewer to visualize, integrate and overlay geoscience data

Visualize, integrate and overlay

View your data in profiles, maps and 3D to gain a deeper understanding of the data and your project area.

Apply custom raster colours and shading to customize the appearance to emphasize details. Compare multiple datasets side-by-side or adjust the transparency of your data layers and overlay them to identify the subtle relationships between the different datasets.

Convert, export and share

Create shareable products to communicate your results with your colleagues and clients. Email or print your maps and 3D views. Quickly export them as images or PDF files to include in reports and presentations.

Share the Geosoft Viewer with colleagues and clients to connect your whole team, allowing anyone to view your geoscience data as maps, databases, or interactive 3D models.

Convert, export and share data with the Geosoft Viewer

Find public data

Find public data

Use the built-in Seeker search engine to access Geosoft's Geoscience Data Service. Quickly find and download public geoscience and topographic data for your project area.

Download data from multiple datasets and choose your preferred file format. Examples of available datasets include: SRTM topography, regional gravity and magnetic survey grids, coastline, political and cultural boundaries in WMS format.

Start using the Geosoft Viewer

The Geosoft Viewer replaces all previous versions of the Oasis montaj Viewer. We recommend that all customers upgrade to the Geosoft Viewer. You may want to check the system requirements for this release before installing.

Download and Install the Geosoft Viewer

Download and Install

(It's free)

Watch the Getting Started video

Watch the Getting Started video

and get the sample data

Share the Geosoft Viewer with others

Share the Viewer

with your team and clients

Release History


Release 9.5 - December 2018

Improved 3D surface display: A new surface rendering engine uses OpenGL to create faster, more pleasing surfaces in 3D. More about this feature >


Release 9.4.4 - September 2018

When importing from a ASEG-GDF database, lines are now included regardless of the character being used to identify the line in the .dat file. (IS237327).


Release 9.4.2 - July 2018

Update to fix an issue where software could crash when loading Oasis montaj on some laptops with a hi-res/4K screens (IS219512).


Release 9.4 - June 2018

Geosoft Viewer released as a new product that replaces the Oasis montaj Viewer. We recommend all existing customers upgrade to the Geosoft Viewer.