.
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
combo box. - Interpolation attribute: Select the attribute column to be used for interpolation
or enable the
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.
- Добавить результат в проект для загрузки результата на в проект.
Figure Interpolation 1:
Модуль интерполяции 
Использование модуля¶
Запустите QGIS и загрузите точечный векторый слой (к примеру, elevp.csv).
- Load the Interpolation plugin in the Plugin Manager (see
The Plugins Menus) and click on the Raster ‣ Interpolation ‣
Interpolation
, which appears in the QGIS menu bar. The Interpolation plugin dialog
appears as shown in Figure_interpolation_1. Выберите исходный слой (к примеру, elevp) и колонку (к примеру, ELEV) для интерполяции.
- 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).
Нажмите кнопку [OK].