The Developer Kernel 11 now allows to create grid/DEM layers from point type data (regular and irregular). The following intrpolation methods are available:
Also, heatmap generation has been implemented in the TGIS_GaussianHeatmap class.
For vector data other than points the interpolation/heatmap generation is performed for the centroids of the objects.
All these methods are contained in GisInterpolation.pas.