Import from Seequent Evo

Use the Import from Seequent Evo option (geogxnet.dll(Geosoft.GX.Evo.ImportObjects;Run)*) from the Seequent Evo menu to import geoscience data from Seequent Evo workspaces into your Oasis montaj project. Evo workspaces serve as storage areas where you can publish, view, manage, and share geoscience data across multidisciplinary teams.

You can also access this option If the option does not appear in the node, it means that Seequent Evo does not currently support importing that data type. from the context menus of Data nodes in the Project Explorer.

Import from Seequent Evo - dialog options

The dialog displays published geoscience objects When publishing to Seequent Evo, your data will be saved in a Geoscience Object format, which can be shared between Oasis montaj and other Seequent desktop and cloud applications. in the currently selected workspace in a tree structure. Objects are listed in alphanumeric order and grouped by status. Within each status category, they are further organized by data type.

Unsupported formats will not appear in the list. For more details, refer to Application Notes below.

Select a workspace:
Workspace	The Workspace list displays all workspaces within the currently connected Seequent Evo instance, sorted alphanumerically. Other users within the same instance can share workspaces with you, and any shared workspaces will be added to the list. By default, the first available workspace is selected. Use the drop-down list to select the workspace from which you want to import data. Your selection will be retained after importing, and the workspace will be automatically selected when you reopen the dialog within the same project. Script Parameters: IMPORT_TO_EVO.WORKSPACE_VALUE
Filter your selection by object name, object data type, creator or last modifier, or a specific published version in Seequent Evo:
Your filter criteria (selected filter and search string) will be retained and automatically applied when switching workspaces or reopening the dialog after importing data.
Filter By:	You can filter the list by: Name (default): Filters published objects by name. Version: Filters by the published version. Created/Modified By: Filters based on the object's creator or last modifier. Data Type: Filters objects by geoscience object When publishing to Seequent Evo, your data will be saved in a Geoscience Object format, which can be shared between Oasis montaj and other Seequent desktop and cloud applications. type: Regular 2D Grid: A regular 2D grid is imported as a plan or section grid. Regular 3D Grid: A regular 3D grid is imported as a numeric or thematic voxel. Tensor 3D Grid: A tensor 3D grid is imported as a numeric voxel with varying cell sizes. Geological Model Meshes: This object type is imported as a geosurface file with closed and/or open surfaces.  Triangle Mesh: This object type is imported as a geosurface file with one closed or open surface.  Downhole Collection: This object type is imported as a collection of databases linked to a common drillhole project. Refer to the Application Notes for details on supported object data types. Script Parameter: IMPORT_TO_EVO.FILTER_OPTION
Search Objects	Enter a keyword or search term based on the selected filter. As you type, the list updates dynamically. If items are selected in the tree view, the number of filtered-out objects appears in parentheses and updates in real time as search criteria change. Clearing the filter removes the text and the count in parentheses. Script Parameter: IMPORT_TO_EVO.FILTER_VALUE
Select the data you wish to import:
Click a column header to sort objects within each category in ascending or descending order. Objects are grouped based on their status and reference to the selected workspace. The tree structure includes the following categories and subcategories:
New and Changed	New: Objects under this category have not yet been imported. Changed: These are imported objects that have been modified since the last import.
Unchanged	Imported objects that remain unchanged since the last import:
Grid, Voxel, Geosurface, Drillhole, etc.	Each category will display subcategories for supported data types, such as Grid, Voxel, Geosurface, Drillhole project, provided there is at least one object in the current workspace that can be imported as the respective type and its status matches the category.
Version	The Version field is enabled for each selected object, allowing you to choose from all available published versions. By default, the most recent version is preselected. From the drop-down list, select the instance you want to import. Script Parameter: IMPORT_TO_EVO.SELECTED_OBJECT_VERSION_0_#
Latest Colourmap	The Latest Colourmap option is available for applicable Grid and Voxel objects and is enabled for each selected object of this type. If Latest Colourmap is checked: The most recent colour display modifications of the published object will be applied to the imported object. If Latest Colourmap is unchecked: The Select Colourmap dialog will open during the import process. Colourmap selection during import: If at least one selected object has the Latest Colourmap option unchecked, the Select Colourmap dialog will appear during the import. The dialog provides a tab for each object requiring manual colourmap selection. Each tab contains a drop-down list of available colourmap versions. If an object has been published multiple times with modifications to its colour distribution method and/or the colour scheme, all modified versions appear in the list, identified by their UTC timestamp. Each entry honours the colour display settings—such as colour distribution method, colour scheme, and number of zones—of that published instance. For each object, select the preferred colourmap version to apply. See the Application Notes below for additional details. The checked state of objects is retained after importing and reopening the dialog within the same project, and when switching between workspaces. Script Parameter: IMPORT_TO_EVO.USE_DEFAULT_COLOUR_MAP_#
Selection State:	Expand/Collapse: Click the chevron icon next to a category or subcategory to expand or collapse the desired node. Checkbox Toggle: The checkbox at the root node level of each category/subcategory acts as a selection toggle that propagates down to the node items and indicates one of the following states: None of the objects are selected: Deselecting a parent node deselects all child objects. All the objects are selected: Selecting a parent node selects all child objects. Some but not all of the objects are selected: Selecting at least one child object results in a "partial selection" for the parent node. Selection states persist after importing and reopening the dialog within the same project, and also when switching between workspaces. The number of selected objects will always reflect the current selection. If a filter is applied, selected items in the tree list are tracked, and the number of filtered-out objects appears in parentheses. The total count of selected objects includes both visible and filtered-out items. Clearing the filter removes the text and the count in parentheses, and updates the total count accordingly. Clearing parameters (Project > Parameters > Clear Parameters) resets settings in both the 'Publish to Seequent Evo' and 'Import from Seequent Evo' dialogs and removes previous object and workspace selections. Script Parameters: IMPORT_TO_EVO.SELECTED_OBJECT_0, IMPORT_TO_EVO.SELECTED_OBJECT_1,.., IMPORT_TO_EVO.SELECTED_OBJECT_#
[Select All]	Click this button to select all objects. The total object count will be displayed. If a filter is applied after objects have been selected, Select All applies only to filtered items, leaving previously unselected items outside the filter unchanged. Clicking Select All does not alter the selection status of items outside the filter. Only the original object count (outside parentheses) updates as items are selected individually or via Select All.
[Select None]	Click this button to deselect all selected objects. If a filter is applied after objects have been selected, Select None applies only to filtered items, leaving previously selected objects outside the filter unchanged. Clicking Select None does not change the selection status of items outside the filter. Only the original object count (outside parentheses) updates as items are deselected individually or via Select None.
Download and open	Select this option to automatically open newly created datasets, each in its own Viewer window within the project's workspace. The datasets are saved in the current project folder and added to the Data tab in the Project Explorer. Script Parameter: IMPORT_TO_EVO.DOWNLOAD_OPTION [0: Download and open]
Download only	Select this option to save newly created datasets in the current project folder and add them to the Data tab in the Project Explorer, without opening them in the project's workspace. Script Parameter: IMPORT_TO_EVO.DOWNLOAD_OPTION [1: Download only]
[Drillhole Preferences]	Available when the selected workspace includes published Downhole Collection objects. When importing downhole collections from Evo, an automatic resurvey is conducted based on predefined drillhole preferences. This resurvey calculates drillhole trace locations (XYZ coordinates) and geometries/shapes using (XYZ) collar locations and survey table measurements (dip, depth, azimuth), if available. Click this button to open the Drillhole Preferences dialog, where you can view and customize import-related settings before initiating the import. Refer to the Application Notes below for further details on imported downhole data.
[Import]	You can select one or multiple objects for import. After making your selections, click Import to close this dialog and initiate the download and import process. If a filter is active and some selected objects are hidden due to filtering, a confirmation prompt will appear, asking whether you want to import all selected objects, including those filtered out. To exclude them, clear the filter. The download and import process runs in the background, allowing you to continue working while large objects are retrieved from Seequent Evo. Multiple instances can run concurrently for different objects. See the Application Notes below for further details on imported data and monitoring the import process in Project Explorer. Closing the Project During Import If you close the project or exit Oasis montaj while a background process is running, a confirmation prompt will appear. Proceeding with this action may result in only a partially imported dataset or datasets.

Application Notes

Import Process

Monitoring Progress in Project Explorer:

• You can track import progress while working on other tasks. The status (e.g., processing, completed, failed, cancelled) and the number of jobs being processed are visually indicated in the Jobs tab.
• New entries for downloaded and translated objects appear in the Jobs tab, under a new node in the tree, marked with the Seequent Evo icon.
• Failures or warnings are signaled with a notification icon on the job's node. Click the icon to view the captured error or warning. For individual entries/tasks, additional details may be available, indicated by an exclamation icon . Click the flagged entry's icon for more information.

Refer to the Jobs section in this topic for more details on monitoring progress and reporting results.

Existing Data

If any imported datasets already exist in the current project, an overwrite confirmation prompt will appear:

• Clicking [No] preserves the existing datasets while still importing the new ones.

• Clicking [Yes] updates existing datasets (voxels, grids, geosurfaces, etc.).

Imported Data

Successfully imported datasets are stored in the current project folder and automatically added to the Data tab in the Project Explorer. Their icons will display a modified version, featuring the Seequent Evo symbol, indicating successful import from Seequent Evo.

Opening Imported Datasets

If the Download and open option is enabled in the import dialog, datasets will open automatically in the current project workspace. Their icons, displaying the Evo symbol, will be visible in window headers when the imported datasets are opened in the current project. However, they will not appear in the Map Manager and 3D Manager panes.

Evo References Across Projects

Evo references Links between local Oasis montaj datasets (e.g., grids, voxels, geosurfaces, databases) and their corresponding remote Evo geoscience objects. are not transferred or shared between projects. Imported objects added to another project will be "unlinked" from Evo, and these datasets will not display the Seequent Evo icons. However, if the entire project directory is shared, Evo references are also shared, and the imported Evo objects will preserve their Evo links.

Removing Imported Objects

When you remove imported objects from the current project using the Remove from Project or Remove All... context menu options, their Evo references Links between local Oasis montaj datasets (e.g., grids, voxels, geosurfaces, databases) and their corresponding remote Evo geoscience objects. are lost. Re-adding them to the project will not restore their link to Seequent Evo, as indicated by the absence of the Evo symbol on their icons.

Reload from Seequent Evo

When a new version of an imported object is released in Seequent Evo, its counterpart in the Project Explorer is marked as out-of-date with a blue status indicator next to it. Additionally, the context menu for the affected dataset will include a new option: Reload Latest from Seequent Evo.

To update the dataset, select it and right-click on the new option. An update confirmation prompt, Import Geoscience Objects, will appear:

• Selecting Cancel retains the existing dataset, keeping the status indicator visible.

• Selecting OK imports the latest from Seequent Evo, including the most current colourmap version for grid and voxel types, and updates the dataset. Once the update is complete, the status indicator and the new context menu option will no longer be available.

Unlink from Seequent Evo

If a dataset's counterpart in Seequent Evo is no longer available (e.g., the geoscience object has been recycled, the workspace has been deleted, or you no longer have access to it), a red status indicator will appear next to the dataset in the Data tab, and a new context menu option, Unlink from Seequent Evo, will be available.

Select this option to remove the Evo reference from the flagged dataset. Once unlinked: 

• The dataset will no longer display the Seequent Evo icon.

• The red status indicator and context menu option will be removed.

Imported Data

Supported Data Types

Data published to Seequent Evo is stored in Geoscience Object A data structure that represents a defined geological, geophysical, or geotechnical concept. format, which can be shared between Oasis montaj and other Seequent desktop and cloud applications. The object types that can currently be imported into Oasis montaj are regular 2D grids, regular 3D grids, tensor 3D grids, triangle meshes, geological models with meshes, and downhole collections.

Regular 2D Grids and 3D Grids

Regular 2D Grids: These types are imported as Geosoft grids:

• Horizontal plans are translated into Oasis montaj plan grids.

• Planar sections are translated into Oasis montaj section grids Section grids can be vertical, inclined (i.e., sections that swing away from the vertical), or horizontal level plan grids with a fixed Z value..

Regular 2D grids originating from raster data (grid) formats will be imported as Geosoft numeric grids.

Regular 2D grids originating from raster image formats will be imported as Geosoft COLOR grids.

Regular 3D Grids: These types are imported as Geosoft numeric or thematic voxels.

The vector voxel type is not supported.

Grids can be defined by cells or vertices. When importing vertex-based 2D/3D regular grids, a conversion to cell-based regular grids will take place. The grid size is extended by one along each axis, and the vertex data is imported as grid points. The resulting grid/voxel will extrude 1/2 cell length along each axis (see "Option 1" in the attached illustration below).

A geoscience object may contain multiple cell or vertex attributes. Importing a multi-attribute 2D grid or 3D grid generates multiple grids/voxels—one for each valid cell/vertex attribute encountered in the object. All generated grids/voxels share the same coordinate system (CS) and CS units when sourced from a single file.

Tensor 3D Grids

Tensor 3D Grids: These types are imported into Oasis montaj as Geosoft numeric voxels with varying cell sizes. Cell-based tensor 3D grids can also be imported into Oasis montaj as thematic (category) voxels.

When importing a vertex-based tensor 3D grid, an average of the cell vertices is calculated to generate a center-cell grid point (see "Option 2" in the attached illustration below).

Conversion Between Vertex-Based and Cell-Based Regular Grids

Certain object types are not supported in Oasis montaj—including 1D geophysical models and point datasets—and will not appear in the Import from Seequent Evo dialog.

Geological Models with Meshes and Simple Triangular Meshes

Geological Model Meshes and Triangle Mesh data types are imported into Oasis montaj as Geosoft geosurfaces. The created geosurface retains the name of the imported geoscience object.

Geosurface Viewer Behaviour: 

When a geosurface is opened in the Geosurface Viewer:

• A simple triangle mesh Basic, non-specific triangulated surface composed of vertices connected by a triangle tree. is imported as a geosurface with a single open or closed isosurface (surface), retaining the same name as the geosurface.

• A geological model with meshes is imported as a geosurface with open and/or closed isosurfaces (surfaces), corresponding to geological features or layers within the model. These surfaces are nested as child nodes under the parent geosurface node

  Surface Selection and Display

  • Closed surfaces (e.g., output volumes Closed volumes which represent a single lithological unit.) are selected by default in the nodes tree and rendered in the Geosurface Viewer window.

  • Open surfaces (e.g., contact surfaces Surfaces that represent the intersection between two geological objects.) are unselected by default and are not displayed in the Geosurface Viewer window.

  • Surfaces retain the names of the features within the geological model and are listed alphabetically.

  • Smoothing control is turned off for all surfaces, and they are displayed with colour fill.

Colour Attributes

• The Colour attribute for imported geological models:
• Closed surfaces: Colours of the corresponding geological features are retained and applied to all closed surfaces within the geosurface.
• Open surfaces: No specific color scheme is applied. Contacts, boundaries, etc., will always default to the fallback colour, which is pink.
• The Colour attribute for imported triangular meshes:
  • Open and closed surfaces: A single (flat) colour is supported for both.
  • Colour assignment for triangular meshes (e.g., topography) is limited to one colour, with pink as the fallback option.

Statistical and Geospatial Information

• The geometry and statistics (e.g., area, volume, number of triangles and vertices) of all surfaces are preserved.

• The geospatial and coordinate system information of the imported geological model is retained in the created geosurface.

Downhole Collections

A Downhole Collection object is imported into Oasis montaj as a set of Geosoft databases, all linked to a common, newly created drillhole project A set of individual databases linked by a common project name. Each type of drillhole data - Collar, Survey, Interval (From-To), Point (Distance/Planar/Lineation) - is stored in its own database. . The constituent databases are prefixed with the name of the imported downhole collection object.

If you are licensed for the Drillhole Plotting extension, you can:

• Open and close the drillhole project using the Open Project and Close Project options (under the DH-Data menu).

• Utilize the imported data to fully explore the extension's tools.

For more information, refer to Overview of Drillhole Plotting Capabilities.

Spatial References and Rendering

Imported datasets retain their coordinate system (CS) and are rendered in Oasis montaj with the same CS and CS units as their published counterparts. Additionally, the following attributes are preserved:

• Spatial extents (X, Y, Z)

• Origin and orientation

• Rendering properties

Rotation

All rotated grids and voxels imported from Seequent Evo into Oasis montaj remain spatially coincident and structurally identical to their originally published counterparts.

Colour Display

Imported datasets handle colour settings based on the Latest Colourmap option:

• If checked, the dataset inherits the most recent colour display modifications of the published object.

• If unchecked, the colour display modifications from the selected colourmap in the Select Colourmap dialog will be applied.

Grids and Numeric Voxels:

• If the object lacks colourmap information or contains an invalid colour zone definition, a default/standard set of category colours (39 zones) is applied. This set is similar to the default colour.tbl used in Oasis montaj for continuous/observational data.

Thematic (Lithology) Voxels:

• If no colourmaps are available for an imported thematic voxel, a default category colour palette is applied.

• The image below illustrates sequential categories in each voxel cell (starting from the lower-left corner) to demonstrate the palette used for thematic voxels.

Colourmaps

When publishing a grid or voxel dataset to Seequent Evo, the Colourmap API:

• Generates a colourmap A colourmap is a mapping of colours to data ranges. based on the dataset's colour display properties.

• Links the colourmap to the geoscience object Data structure that represents a defined geological, geophysical, or geotechnical concept representing the dataset.

• Publishes both the geoscience object and its colourmap to Seequent Evo.

• Enables seamless integration between Oasis montaj and other Seequent applications, ensuring standardized colour representation across projects and enhancing geophysical data collaboration.

Example of sharing and visualising geophysical data:

In Oasis montaj, a grid dataset is published to Seequent Evo.

• The dataset is uploaded as a geoscience object along with its associated colourmap, which stores colour display properties (e.g., colour scheme, distribution).

• A geologist imports the geoscience object from Seequent Evo into their Leaprog instance, ensuring:

• Colour display settings remain consistent across platforms

• No manual adjustments are needed

• The data in Leaprog is visualized exactly as it appears in Oasis montaj, using the imported colourmap—eliminating the need to manually recreate colour settings.

Similarly, a geological model can be published from Leapfrog to Seequent Evo.

• A colleague then imports the published geoscience object into an Oasis montaj project.

• The imported geosurface, which includes surfaces corresponding to the geological features or layers within the geological model, is displayed with the same colour fidelity as in Leapfrog.

• This seamless integration ensures accurate colour representation without loss of detail, enabling a geophysicist to leverage the model for tasks such as building a VOXI inversion.

Supported Colourmap Types

When publishing to or importing from Seequent Evo, the following colourmap types are supported:

• Discrete: For grid or numeric voxel datasets, a discrete colourmap is generated, mapping ranges and colours to dataset values. Each colour corresponds to a specific value range or numeric interval.

• Category: For thematic voxel datasets, a category colourmap is created and linked to the published geoscience object, mirroring its lithology classification codes and colours.

  Thematic (lithology) voxels use rock code colours stored in a predefined lithology/rock code CSV file, which includes:

  • A “Code” field that matches the lithology classification of the geological data used in generating the voxel.
  • A “Colour” field defining numerical values assigned to each code.

When importing into Oasis montaj, the following colourmap type is also supported:

• Continuous: Uses colour gradients stretched across a range of values. When importing a geoscience object with a continuous colourmap (where the colour of a cell is a function of the gradient controls), the colourmap is discretized using linear distribution and mapped to Oasis montaj's internal colourmap representation.

Log and Cache Files

Each import session creates an entry in the Evo log file, which records timestamped processing details. The log file is stored in the log folder within the evo directory, located under the temporary file directory.

Additionally, for each import session, a cache sub-folder is created in the download folder within the evo directory. This sub-folder is assigned a unique eight-character identifier.