Abstract. The application of a game method of megatextures in GIS systems is considered in the article. The main attention is paid to the method usage not only in image display , but also in relief scaling and 3D models. The application of the method of relief megatextures will allow to significantly increase the image quality of a relief and the quality of the calculations of volumes and distances almost without losing system productivity. It is possible to use this technique in any modern GIS, that will allow to process much more basic data.