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Advanced Estimation - Save Models Managing loaded variogram models |
Advanced Estimation - Fit Models - Save Models
To access this dialog:
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Using the Advanced Estimation dialog, select the Fit Models menu item. Select the Save Models tab on the right-hand side of the panel.
Each time a new variogram model set is created it is saved and its description is displayed in the Candidate Model Set area on the Save Models tab. You can use this panel to create new candidate data sets or update an existing one with new parameters.
This panel is only visible if Supervisor data is not being imported. You decide this using the Scenario Setup screen.
The functions of the panel are to:
- save/update variogram model sets so they can be used for estimation
- import, export or delete a variogram model set
- add or remove a model set in the graphical display
Multiple variogram models can be created within the same Variogram Model Set (VMS). A VMS can include models for multiple grades but a VMS cannot include multiple models for the same grade. Therefore each model is identified uniquely by its VMS and its grade.
If a VMS contains models for multiple grades and is exported to a DM variogram model file, all models will be assigned the same VSETNUM value which is set equal to the VMS value. The GRADE field will also be exported to the DM file so the model can be identified.
To ensure the output data is compatible with other Studio processes, a unique VREFNUM value will be assigned to each data row (explicit).
Output data will be automatically detected as a Variogram model
data file and will be added to the Variogram-models
(Adv Est) folder in the Project
Files control bar for easier retrieval and review:
Note: Advanced Estimation is part of the Studio RM toolset. Additional licensing modules aren't required.
Field Details:
Candidate Model Sets: each saved candidate model set is represented by the following table columns:
- Display: enabled by default, this check box determines if the model set is displayed on the selected variogram or not.
- Description: an editable description of the model set. Click in this field to edit its contents.
- Variables: the grades for which variogram models have been created
- Zone: the domain(s),
if any, to which the models apply. Click inside the cell to display
other zones.
Having access to the other zone combinations for the current estimation scenario could be useful, for example: - when a zone has insufficient data and you want to use the domain of a different variable.
- when you want to use one variable's variogram for a different variable. (e.g. a variogram modelled for AU and you wish to run it for AUCUT).
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when copying a scenario and being able to re-use it for a different variable.
- Multivar: shows whether the models are multivariate (Yes) or univariate (No)
- Fitting: Auto if the model has been created automatically or Mix if there has been any manual editing
- Trans. shows Yes or No depending on whether normal-score transformed values are displayed. If the fitted variogram model has already been back-transformed, this will state Back.
Candidate Model Sets - Operations: the operations includes:
- Create model set: highlight the model(s) and click this button. A summary is displayed in the Estimations area.
- Update model set: update the currently selected candidate model set with the current settings. Only available if a candidate model set is selected below.
- Import: click the Import button and browse for a variogram model file that is in Studio format.
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You can import standardised variogram models from Datamine Supervisor using this function. |
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During variogram model import, file contents will be analyzed to ensure it contains the fields required to complete the estimation process. For example, if a zone field (either the first or second zone) is expected but cannot be found in the incoming file, a message will be displayed explaining which field is expected and cannot be found. Similarly, other required fields such as VSETNUM, GRADE, GRADE2 and TRANS fields are checked. |
- Candidate Model Sets: displays a list of all configured model sets. You can choose to Display one set at a time and in each case, a reference number (Ref), selected zone or absent if no zonal control is used (Zone), whether the set is univariate or multivariate (Multivar), the type of model fitting performed (Fitting), whether the data is transformed or otherwise (Trans) or if it has been committed to KNA and/or an estimation run (In use).
- Commit to KNA & Estimation: highlight one or more rows in the Candidate Model Sets area and click the Create estimation(s) from selected model button. A summary of the parameters is added to the Estimations area. Multiple sets are chosen by holding down the Ctrl key while selecting with the mouse.
- Export:
highlight the model set to be exported, click the Export
button and select a folder and file name. Note that the model set
may contain more than one model. You
may need change the VREFNUM values depending on what the file
is being used for.
Exported variogram models will be automatically added to the Project, and will be accessible using the Project Files control bar. - Back-transform:
only available for samples in transformed space (i.e. the Transformed grades radio button
is selected, and samples have already been converted to normal
score distributions using the Create
Variograms panel). Select any candidate model set where Trans
= "Yes" and you can back-transform to an untransformed
sample set. Once a back-transformation has been completed, the
Untransformed grades
radio button is automatically selected and your updated variogram
will be displayed.
This command uses the NSMODBAK process. - Fit Sills Only: choose to transform only the sill values (instead of the sill and ranges) when variogram models are transformed from Gaussian to original units.
- Delete: highlight the model set and press Delete. Note that if you delete any set apart from the one in the last row, then the reference numbers will change to create a new ordered sequence starting from 1.
Estimations
The variables to be estimated, the zone(s) selection and the variogram models are copied from the Variogram Model Set to an Estimation Set.
This forms the basis of a set of estimates to which other parameters such as search volumes and estimation method will be added from the Estimation panels.
Multiple sets of estimations can be defined and run as a single process. You can double-click to edit the automatically-generated estimation name. Once an estimation is selected, you can click the X in top right corner to delete it.
