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Модуль интерполяции

The Interplation plugin can be used to generate a TIN or IDW interpolation of a point vector layer. It is very simple to handle and provides an intuitive graphical user interface for creating interpolated raster layers (see Figure_interpolation_1). The plugin requires the following parameters to be specified before running:

  • Input Vector layers: Specify the input point vector layer(s) from a list of loaded point layers. If several layers are specified, then data from all layers is used for interpolation. Note: It is possible to insert lines or polygons as constraints for the triangulation, by specifying either “points”, “structure lines” or “break lines” in the Type selectstring combo box.
  • Interpolation attribute: Select the attribute column to be used for interpolation or enable the checkbox Use Z-Coordinate checkbox to use the layer’s stored Z values.
  • Interpolation Method: Select the interpolation method. This can be either ‘Triangulated Irregular Network (TIN)’ or ‘Inverse Distance Weighted (IDW)’.
  • Number of columns/rows: Specify the number of rows and columns for the output raster file.
  • Файл вывода: Выберите название для выходного растрового файла.

  • checkbox Добавить результат в проект для загрузки результата на в проект.

Figure Interpolation 1:


Модуль интерполяции nix

Использование модуля

  1. Запустите QGIS и загрузите точечный векторый слой (к примеру, elevp.csv).

  2. Load the Interpolation plugin in the Plugin Manager (see The Plugins Menus) and click on the Raster ‣ Interpolation ‣ raster-interpolate Interpolation , which appears in the QGIS menu bar. The Interpolation plugin dialog appears as shown in Figure_interpolation_1.
  3. Выберите исходный слой (к примеру, elevp) и колонку (к примеру, ELEV) для интерполяции.

  4. Select an interpolation method (e.g., ‘Triangulated Irregular Network (TIN)’), and specify a cell size of 5000 as well as the raster output filename (e.g., elevation_tin).
  5. Нажмите кнопку [OK].