Revision as of 13:43, 4 February 2025 view source Abigail.lillo (talk \| contribs) Bureaucrats, Administrators 539 edits →Extract Elevation of Polygon Vertices from DEM ← Older edit		Revision as of 13:52, 4 February 2025 view source Abigail.lillo (talk \| contribs) Bureaucrats, Administrators 539 edits →Generate IDW Interpolation Newer edit →
Line 50: ==Generate IDW Interpolation== Generate a IDW (Inverse Distance Weighted) interpolation of the zZ shape points layer, using the QGIS processing tool 'IDW Interpolation'. For more information about this tool, please refer to <u>[https://docs.qgis.org/3.34/en/docs/user_manual/processing_algs/qgis/interpolation.html#qgisidwinterpolation QGIS Documentation - IDW Interpolation]</u>. <ol> <li> In QGIS, load all Z shape point layers within the merge polygon extent (e.g. '''2d_zsh_M02_landscape_002_P'''). <li>Go to 'Interpolation' in the processing tool list and select 'IDW Interpolation'. This opens the dialog shown below: Vector layer: Select the zZ shape points layer (e.g. '''2d_zsh_M02_landscape_002_P'''). Interpolation attribute: Select '''Z'''. This is the attribute that contains elevation data. Click [[File: QGIS_3D_Animation_add_keyframe_button_01.png\|30px]] to add the vector layer to the table~~. Repeat the above two points for all points layers within the merge polygon extent~~. Repeat the above three points for all Z shape points layers within the merge polygon extent. Distance coefficient P: Leave as default. Extent: Click down arrow [[File: interpolation_extent_icon.png\|40]] and select 'Calculate from Layer' >> 'Draped_Polygon'. Interpolated: Leave as default. Tick on 'Open output file after running algorithm'.

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