Conversion from LAS to Point Cloud
- Startup SAGA GIS.
- Select Modules | File | Shapes | Import | Import LAS Files.
The Import LAS Files dialog box appears.
- Select the Input File row. Click the [...] button on the right. Browse and select a LAS file to import. Click Open.
- In the Attributes to import besides x,y,z list, toggle on intensity.
- Click Okay.
The LAS file is imported into SAGA GIS.
Note: it may be necessary to click the Data tab on the Workspace pane on the left to see the newly imported Point Cloud file.
- Select Modules | Grid | Gridding | Interpolation from Points | Triangulation.
The Triangulation dialog box appears.
- In the Points row, click the drop down list and select the previously imported LAS file point cloud data set.
- In the Attribute row, click the drop down list and select intensity.
- Click Okay.
The User Defined Grid dialog box appears.
- Optional. Change any of the options e.g. Cellsize value to 1. Click Okay.
The interpolated intensity grid is created.
- In the Data tree, right click on the newly created grid file.
A pop up menu appears.
- Choose Show Grid. Note: The Add layer to selected map dialog box may appear. Click OK.
The intensity grid is displayed with the default color gradient.
- On the Options pane on the right, click the Settings tab. Select the Colors option of the Graduated Color option as shown below.
- Click the [...] button.
The [CAP] Colors dialog box appears.
- Click the Presets button. Choose the Greyscale in the Preset Selection dialog box. Click OK.
The [CAP] Colors dialog box is updated.
- Click Okay.
- Click the Apply button on the Options pane.
The intensity grid display is updated with the greyscale color range.
- In the Data tree, right click on the intensity grid.
A pop up menu appears.
- Choose Save Grid as Image.
The Save As Image dialog box appears.
- Browse to an output folder. Type in a file name. Choose Tagged Image File Format in the Save as type drop down list. Click Save.
The Save Grid as Image dialog box appears.
Note: toggle on Save Georeference to create the *.tfw world file. Toggle on Legend: Save to create the *_legend.tif file of the color legend.
- Click Okay.
The intensity TIFF file is created.
file.
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