Structure lines: continuous lines that add information to the surface.The TIN method accepts different input vector entities, each influencing the triangulation differently: In order to generate a digital terrain model according to QGIS 3 terrain shapes, it uses the TIN interpolation method (networks of irregular triangles). Like other interpolated surfaces, digital terrain models are evaluated for their horizontal and vertical accuracy.Īlso, it is of interest the adequate representation of the forms of the terrain, that allows, the hydrological, geomorphological, climatic modeling, among others. This article is part of a sequence, after the creation of the DEM ( download practice exercises), will incorporate a dike, will estimate the water mirror and the calculation of the volume dammed. However, when you want to model a portion of the earth’s surface the problem is different, the relief has known shapes and details that must be reproduced. In QGIS 3 it is possible to generate surfaces of a variable by interpolation, generally using coordinate points with elevation information. On this occasion we will see how to generate a Digital Elevation Model (DEM) that reflects the shapes of the terrain using various vector entities.
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