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| ====== 3D Interpolation ====== | |
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| This tutorial will show how to interpolate point data to a 3D Grid using simple Inverse Distance Weighting. In this tutorial we will interpolate 1D geophysics, but XYZ points are interpolated in the same way. | |
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| ==== Requirements ==== | |
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| === Module === | |
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| FIXME | |
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| === Data === | |
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| You can use any project that contains points data or XYZ points, e.g., the project you created in the Tutorial "[[:tutorials:adddata:xyz|Add XYZ Points]]" or the project you created in the Tutorial "[[:tutorials:adddata:geophysics|Add Geophysics]]". | |
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| ==== Step 1: Preparations ==== | |
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| 2. Open your project.\\ | |
| {{:tutorials:voxelmod:bb6cd6347c94038edc3e931caef07ca0.jpg}} | |
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| ==== Step 2: Interpolate ==== | |
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| 1. Right click the "TEM 40" node (1D geophgysics) in the Object Manager tree and select "Interpolate…" to open the "Interpolation Wizard".\\ | |
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| 2. In the "Algorithm" page select the 3D "Inverse Distance Weighting" algorithm.\\ | |
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| 3. Go to the "Source Data" page. Press the "Get Data" button. Set "Vertical Sample Distance" to 5 and press "OK"\\ | |
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| 4. Go to the "Settings" page. Check that the "Exponent" is set to 2.\\ | |
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| 5. Go to the "Search" page. Set "Search Ellipsoid" to 500 for X and Y, and set Z to 5.\\ | |
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| 6. Go to the "Grid Geometry" page. In the "Grid Extent" box press the "Scene Extent" button to set grid size to scene extent. Set "Z Min" to -200, and "Z Max" to 100.\\ | |
| In the "Node Spacing" box set the node spacing to 150 for "X" and "Y" and 5 for "Z". Press "adjust" to adjust Grid extent according to node spacing.\\ | |
| {{:tutorials:voxelmod:c53f4f06b37bb6076fabc14ecfb78081.png}}\\ | |
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| 7. Go to the "Destination" page. Check the "New 3D Grid" radio button. Select a file name for the created 3D grid, e.g., "[path]\MeanRes.grd3". Enter "MeanRes.grd3" in the "Name For Created 3D Grid Dataset:" box. Enter "MeanRes" in the "Name for Created 3D Grid Object" box.\\ | |
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| 8. Go to the "Finish" page. The interpolation wizard is ready to interpolate the Tem40 data and the "Finish" page gives a summery of the entered values in the wizard. Press "Finish" to perform the interpolation and to create a new 3D grid object as illustrated in image below.\\ | |
| {{:tutorials:voxelmod:41ac65ac0a747e2227d42da5a92d10f1.jpg}} | |
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| ==== Step 3: Show Slices ==== | |
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| 1. Double click the 3D grid node in the Object Manager tree to open the property dialog for the 3D grid we just created.\\ | |
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| 2. Go to the "Nodes" tab. In the "Node Points" box un-check the "Visible" check box.\\ | |
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| 3. Go to the "Slices" tab. In the "Horizontal (XY)" box, press Add and check the "Visible" check box. Press the "Apply" button. You can add as many horizontal slices as you want.\\ | |
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| 4. In the "Horizontal (XY)" box drag the slider to the right to move the horizontal slice up and the MEANRES grid will appear as in image below.\\ | |
| {{:tutorials:voxelmod:63b5b43d01e8b8cb5c867b093dd57b5a.jpg}} | |
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| ==== Step 4: Show Isosurface ==== | |
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| 1. Go to the "Slices" tab. In the "Horizontal (XY)" box un-check the "Visible" check box. Press the "Apply" button.\\ | |
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| 2. Go to the "Isosurface" tab. Check the "Visible" check box. Set "Increment" to 1. Move the slider to the right to change the isosurface value to approximately 70.\\ | |
| {{:tutorials:voxelmod:118c80b5c40e2c11aaadb1f65e7697f8.jpg}} | |
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| ==== Step 5: Smooting The Grid (advanced) ==== | |
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| 1. Open the GeoScene3D Toolbox from the main window toolbar.\\ | |
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| 2. Select "Add Files From Source Manager…" from the File menu.\\ | |
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| 3. Select the file for the 3D grid you just interpolated.\\ | |
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| 4. Select and right click the 3D grid file in the left portion of the Toolbox window. Select "Grid Value Operations…" in the menu.\\ | |
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| 5. In the "Grid Value Operations" dialog select the operation "Smooth"\\ | |
| {{:tutorials:voxelmod:c609021f3c44e519e20dc3f7b21efc91.png}}\\ | |
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| 6. Press "Execute". In the save grid dialog that appears select the grid file you just interpolated. Confirm to overwrite the grid file.\\ | |
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| 7. Press "Close" to close the "Grid Value Operations" dialog.\\ | |
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| 8. Close the Toolbox window.\\ | |
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| 9. Double click the isosurface in the 3D window or the node in the Object Manager to open the 3D Grid property dialog.\\ | |
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| 10. Press "Refresh Data" to see the smoothed isosurface. | |
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| ==== Result ==== | |
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| {{:tutorials:voxelmod:a580072bf39bf7cbc00a82b10188055d.jpg}} | |
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