| [1] Longley, P. A., M.F. Goodchild, D. J. Maguire, D. W. Rhind. Geographic Information Systems-Principles, Techniques, Management and Applications. John Wiley & Sons, Inc.New Jersey, USA, 2005 [2] ESRI, Managing a GIS, ESRI Educational Services California USA, 1997 [3] Antenucci J. C., K. Brown, P.L. Croswell, M.J Kevany, H. Archer, Geographing Information Systems, A Guide To the Technology. Van Nostrand Reinhold, New York, USA, 1991. [4] Menke, K. Discover QGIS 3.x. Locate Press LLC, PO Box 671897, Chugiak, AK, USA, 99567-1897. |