Oasis montaj 6.4 Release NotesJanuary 22, 2007Installing the UpdateWhat's new in Oasis montaj 6.4montaj Extensionsmontaj Plus Extensions (Geosoft Partner Software)Previous release notesHow to update your softwareInstallation InstructionsBefore you install you'll need Microsoft .NET 2.0Oasis montaj 6.4 requires Microsoft .NET Framework 2.0 to be installed. You will not be able to upgrade using the patches until .NET 2.0 is installed. Click here to download Microsoft .NET 2.0 The .NET Framework is also available on the Oasis montaj 6.4 CD in the extra installs folder. How to install Oasis montaj 6.4To download and install the new release online:All maintained users can upgrade online in Oasis montaj. On the Help menu in Oasis montaj, click Check for updates and follow the instructions on the dialog boxes as they appear. To download and then install the 6.4 release offline:Go to the Oasis montaj updates page and download the Oasis montaj 6.4 Update. Unzip and run the exe file. Follow the instructions on the dialogs as they appear. The offline file for 6.4 is very large (190 MB) and may take some time to download. Oasis montaj 6.4What's new in Oasis montaj 6.4?Oasis montaj 6.4 is a major release that includes many new features, 3D enhancements and bug fixes. Powerful voxel extraction tools
Extract your section grids and your plan gridsYou can now extract section and plan grids more easily. These new tools allow you to extract multiple vertical or horizontal grids from your voxels and view and manipulate your data in a 2D or 3D environment. Voxel Section ExtractorVertical section grids may be extracted from a voxel. Sections may be extracted based on the selected lines defined in your database or interactively based on a line digitized on a map. The sections may have any azimuth. Voxel Depth Slice ExtractorsHorizontal plan grids may be extracted from a voxel at a specified elevation. Elevation grids at specific elevations may be extracted one at a time. Multiple elevation grids may also be extracted given the start elevation and a specified depth increment. Plot Isosurface tool
Generate 3D views of isosurfaces from your voxelsGeosoft's new Plot Isosurface tool is a valuable visualization tool that displays isosurfaces from your 3D grids, enabling you to gain a better understanding of geological formations. Create many isosurfaces, each with a unique colour. Anisotropic 3D gridding
Enhanced 3D gridding functionalityThe addition of anisotropic voxel and spherical gridding capabilities adds easy-to-access value to what you can learn about targets in their 3D environment. You can grid in your preferred direction. Specify the strike, dip and plunge, and preferred weighting to create more meaningful 3D grids that honour the data and preferentially enhance trends in the specified direction. Automated Map Sheets
Easily produce multiple map sheetsNow, with Automated Map Sheets it's faster and easier to generate multiple map sheets from a regional map covering a large data area. Geoscientists who make a series of maps that require consistency will appreciate the ability to easily apply a single map template to multiple maps. Map Snapshot Tool
Quickly go back to areas of interest and preview new data as new data arrivesThe new Map Snapshot tool enables you to 'bookmark' any areas of interest. Making it easy to go back and review potential targets. Once you take a Map Snapshot of the location, it's embedded in your file, making it easy to share with your colleagues. ArcGIS Layer File Support
Easily display ArcView layer (.lyr) filesIf you're an ArcView user, you will appreciate that your maps now look the same whether you're viewing them in ArcView, in Oasis montaj or in Target. As you zoom or pan the layers will redraw, allowing you to see them exactly the same as you would in ArcView. Imports GOCAD surface data files
Surface files created in GOCAD can now be displayed within our 3D subsurface environment. Strike – Dip SymbolsGeologists can now easily plot strike –dip symbols on maps. Given a database with an X, Y, Strike, and Dip channel, a user can plot standard strike-dip symbols at each location to visually represents the strike and dip angles. An appropriate legend is automatically created. Auto Re-colour Option
This toggle button enables the user to automatically recolour the displayed grid area as the grid extents change within a map window. When this toggle is selected, each time a map is zoomed or panned, the full range of colours is used in the display. This is useful for examining areas of interest. Import EMFAdded support for the import of EMF files into maps. Vertical scale lines in Profile windowA new option in the database profile window that displays vertical scale lines in the profile window. These reference lines make it easier to determine the size of your field of view when zooming in on specific anomalies. These lines will be present in any profile plots that are created. Help ButtonTo conform to the latest Microsoft guidelines we have changed the help button in our GX dialogs to a '?' button at the top of the dialog window. This has not altered the way the help system has been working. General Look and FeelThere are some minor changes to the look and feel of the dialogs and other toolbars within Oasis montaj. Some .NET dialogs will reflect this with yellow Stars to indicate required fields. A red exclamation mark will indicate to a user if these fields are blank when a user tries to run the dialog. 3D SpinningThe 3D viewer now supports spinning. The mouse is used to define the rotation direction and speed. The model will spin until another click of the mouse. Zooming and layer controls may be used while the view is rotating. Z dimension option in Voxel GriddingWhen creating 3D grids, the Z dimension may now be specified and may be different from the X and Y dimensions. By default, the voxel cell sizes in the Z direction are the same as the dimensions for the X and Y directions. CDI Grid Ribbon OptionWe have added support for a ribbon section grid based on a CDI database. The ribbon plot option allows users to create a grid along the actual path of the data. Oasis montaj extensionsGeochemistry
Math Expression Support in scatter plotsWith fewer steps you can be more efficient. Now, scatter plots directly support Math Expressions reducing the number of steps to display your data in XY plots and tri-plots. Leaving you more time to interpret your geochemistry data. The multiple scatter plots (CHMSCAT. gx) now has the option to colour the symbols from a colour zone based upon a third channel. MAGMAP
New Interactive Spectrum FilterAllows you to quickly preview filtered grids. The MAGMAP Interactive Spectrum Filter solution is a dynamic visual tool that provides an interactive slider allowing you to adjust filter parameters and preview the results instantly. Now it's easy to experiment. You can quickly preview how each filter enhances specific features you are considering before applying the filter to your entire grid. UX-DetectNew intuitive streamlined workflowTo maximize productivity in preparing, processing and managing UXO targets — and to minimize the possibility of error — there are fewer steps, and each step flows seamlessly. We have redesigned the menus: one for data preparation, another for parameter determination and processing and a third menu for target management. GeophysicsSEG-Y Reader - Easily import and view SEG-Y filesConverts seismic data SEG-Y files to either a database, voxels or grids that can be integrated into your projects. DrillholeNew Collar plottingA new Collars Tab has been added and has three main selections for collar symbols: Fixed, Zone and Classified. This provides more flexibility in the collar display of your surfaces and sections. Previously, the collars were plotted as circles, with their size proportional to the label size, and their colour the same as the hole trace colour. IPA new export has been added for the UBC DCINV2D/IPINV2D format. montaj Plus Extensions (Geosoft Partner Software)New NGA GM-SYS FeaturesSEG‑Y ReaderThe SEG‑Y Reader application, available with GM‑SYS Advanced Profile Modeling and the Oasis montaj Geophysics extension, converts 2D and 3D SEG-Y standard files to formats that may be used in GM‑SYS, GMSYS‑3D, and Oasis montaj. SEG‑Y Reader may be run as a stand-alone application, or may be called from within GM‑SYS Profile when loading a SEG-Y file as a Backdrop. It may also be started from within Oasis montaj, but there is no linkage between the applications. Writing a Geosoft file (grid, database, or geosoft_voxel) requires an Oasis montaj license. A 2D SEG-Y file can be converted to a Windows Bitmap (BMP) suitable for importing into GM‑SYS Profile, an oriented Geosoft Grid (GRD) that may be displayed in a 3D View (GMSYS‑3D or other), or a Geosoft Database (GDB). Configuration options allow the file to be projected onto any vertical plane (e. g. a GM‑SYS Profile model), to be windowed or decimated in the X (distance) and/or Z (time or depth) directions, and the vertical scale and units to be modified. Trace coordinates from trace headers may be used, or they may be imported from a separate navigation file. A 3D SEG‑Y file can be converted to a Geosoft Database or a 3D Geosoft grid (geosoft_voxel), which may be incorporated into a GMSYS‑3D model, displayed in 3D Views, or exported to another 3D format (e. g. GOCAD). Currently, the voxel size information (orientation, sample spacing, and rotation) must be entered by hand. Horizontal Magnetic Gradient (Btx) CalculationsGM‑SYS Advanced Profile modeling now calculates the horizontal (Btx) magnetic gradient. GXs have been rewritten to allow this gradient data to be included in new models created from within Oasis montaj, whether from a database or a series of grids. You may also import horizontal magnetic gradient data into an existing model. Improved horizon import from Oasis montajThe maximum number of horizons incorporated into a new model from Oasis montaj has been increased to 15. When extracting a model from grid profiles, specify up to 15 horizon grids, or specify up to 15 horizon channels from a Geosoft database. A new option in each dialog allows you to specify whether the horizon information is "depth" (i. e. positive down) or "elevation" (i. e. positive up) for the selected grids or channels; all must be the same orientation. Use either "old" Raster or "new" Vector Patterns.For backward compatibility, you may elect to use to the "old" raster patterns when displaying or printing your model. While the "new" vector patterns are intended to mimic the original raster patterns as closely as possible, they are not exactly the same. For purposes of exact reproduction, use the raster patterns. Select the Use old raster patterns in model view check-box in the Preferences (File | Preferences | Miscellaneous) to enable the old style patterns. Using raster patterns may obscure Bitmap Backdrop images, since the raster patterns cannot be made "transparent". Simplify SurfacesOver sampled surfaces force GM‑SYS to perform unnecessary calculations and make editing a model more cumbersome. This commonly occurs when models or surfaces are extracted from grids or imported from seismic processing or other applications. The Simplify function allows you to remove redundant points from an existing surface. Select Examine (the eyeball on the toolbar) and click on the surface between points (you may have to zoom in). The surface spreadsheet will be displayed. You can scroll down to the bottom of the spreadsheet to see how many points are in the surface. Click on [Simplify], enter a "Straightening Tolerance" and click OK. You can check the # of points in the spreadsheet to see how many it removed before you save it. If too few points were removed, click on simplify again and adjust the Straightening Tolerance. If too many points are removed, select [Cancel] and select the surface again. When you are ready to save the decimated surface back in the model, just click on OK. This step may be slow on big models. You can also Simplify a surface when you are importing it as a file using the [ImpSurf] function. A new Straightening Tolerance field has been added to the import dialog. If you leave it set at 0, it has no effect; otherwise it will decimate the file as it brings it in. If you don't approve of the changes, click [Clear] and Load the file again. Axis Scaling in CVTGMSOccasionally, a model may be built using the wrong axis units. A new Scale Axes feature in CVTGMS enables the X and/or Z axes to be scaled independently by any factor. GM-SYS Enhancements
NGA GMSYS-3DNew in Release 1. 4 (Oasis montaj 6.4)Gravity gradient calculationsGravity gradient calculations are better integrated into GMSYS-3D. When defining the grids to be used for observed anomaly, calculated anomaly, and error, you may specify the component to be associated with the grids. Multiple components may be specified and you may switch the calculation to any component. Gradient inversionsGravity structural inversion and lateral density inversion can operate on "normal" gravity or the vertical gradient of gravity (Gzz). Select the component to be used in the calculations when selecting the anomaly in the "Gravity" pane when setting up the model. Inversion on other components of the gravity gradient tensor are not yet supported. Layer "piercing" added to inversionA new layer property determines whether a horizon is "pierceable" during inversion. A pierceable horizon may be modified during the structural inversion of an adjacent layer, allowing the inverted horizon to "pierce" the adjacent grid. In reality, the "pierced" horizon and the inverted horizon will be coincident and move together. If a horizon is not pierceable, then the inverted horizon will stop moving when it encounters a non-pierceable horizon. Constraints on inversionAn additional [Limits] button has been added to the dialogs for Structural and Lateral Density inversions. For the Structural inversion, you may set a relative limit specifying how much the horizon may change during the inversion and absolute limits preventing the inversion horizon from passing specific elevations. In the Lateral Density inversion, you may set absolute limits for the minimum and maximum density allowed. Multiple "Undo" levels for inversionThree methods are available to recover the previous model state after inversion. First, a simple one-level "undo" restores the model's previous inversion surface or density distribution grid and refreshes the anomaly grids and maps to their original state. Secondly, the inversion target grid may be backed up explicitly, or under an automatically incremented naming scheme. Finally, one may use the [ChkPt] button to back up the entire model by invoking GMS3MDUP. GX to copy, or "checkpoint" the entire model to a separate directory. Scale GMSYS-3D models to a new sizeGenerate a copy of the current model, scaling the model by a factor n so that:
The scale factor n may be any positive decimal value, within reason. Values of n < 1 reduce the number of grid cells and increase the size of the cells, resulting in a loss of resolution, whereas values of n > 1 increases the number of grid cells and makes the cells smaller, resulting in models that are capable of higher resolution. Model Explorer updatesThe Model Explorer provides basic statistics for all grids used in the model on mouse-over. Simply move the mouse over the grid name and it will display the grid min, max, mean, and standard deviation as a tool-tip. Build a starting index gridA new function allows you to build an "index" grid from scratch, greatly simplifying the process of building a theoretical model. Specify the new grid name, dimensions, cell size, origin, and a constant value for the grid. Forward calculations from 3D grids (Geosoft voxels)Calculate the gravity response or the magnetic response from a 3D grid containing density or susceptibility values, respectively. Radiometrics - Praga3
GSS – PotentQIGRF10The IGRF (background magnetic field) calculation now uses the IGRF10 model, which can extrapolate the magnetic field calculation out as far as the year 2010. New toolbarsThe previous single toolbar has been split into "Standard" and "Tools" toolbars. In addition, two new toolbars have been created:
Edit Body dialog (P)The General page of the Edit Body dialog box now has a check box that allows you to enable or disable inversion of that body. If inversion is enabled, then Potent functions as previously. If it is disabled, then no parameters of that body are varied during inversion, regardless of the settings of their Invert flags. Extra functionality has been added to the Edit Model dialog box:
Composite Model dialog (P)The new "Show composite Edit Body dialog" command in the Model menu displays the new "Edit Body Composite" dialog box. This is a large dialog box that works best on a large screen or, preferably, a dual monitor system. The following features provide powerful modeling control:
Using this dialog box can significantly speed up setting up and editing your model. Inversion RMS difference displayFirstly, the term "RMS error" has been replaced by "RMS difference" in various messages, as this more correctly reflects its meaning. A new option in the Invert | Options dialog box allows you to choose whether or not to display the ending RMS difference in a message window at the end of an inversion. Similarly, a new command "Show previous result" in the Calculation menu allows you to re-display the RMS difference that was returned by the previous inversion. Select axis to be used for residual field plotIn previous versions of Potent the residual field, if selected for display, was drawn on its own axis in the bottom half of the profile pane. This was done so that the residual profile would generally be visible, even if there was a large offset in the other profiles. It also made it easier to view by separating it from the other profiles. This Potent release introduces an Own Axis option in the Profile Window Settings dialog box which, if not checked, causes the residual profile to be plotted on the same level as the observed and calculated profiles. 3D DXF output (PQ)When PotentQ terminates it automatically generates a set of files for subsequent use by Oasis montaj. For example, a Geosoft polygon file is created that allows the PotentQ model to be drawn on an Oasis montaj map. This set of files now also includes a 3D DXF file. A 3D representation of the model can be added to an Oasis montaj 3D map by using the Import | AutoCAD DXF file command from the Oasis montaj Map menu. PGW – SED UpgradeIn the latest SED to be released with OM 6.4, PGW has completely revamped the core DLL for determining the gradient (down dip) directions of the pseudo gravity/RTP/RTE grid, from eight cardinal directions (0-360o at 45o interval) to continuous varying from 0-360o. Furthermore, the new SED package allows the so-called TDX derivative (see definitions below) grid to be used in source edge computations, in addition to the horizontal gradient method. The new SED can compute TDX in three ways – from RTP, from Dx, Dy and Dz, or from Horizontal Gradient (sqrt(Dx*Dx+Dy*Dy) and Dz. TDX Derivative = tan-1 (horizontal_gradient/vertical_derivative); TILT Derivative = tan-1 (vertical_derivative/horizontal_gradient); As a result of the revamp of SED core DLL, a new plotting routine is created to replace the previous two plotting GXs.
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