This paper presents a method that has been developed for creating perspective relief images capable of extracting measurement information as a feature of the distance from the observation post. This method produces a perspective image of the relief, as the latter would look if it was photographed from a known shooting point in relation to a target point, using a photo camera of known geometry, and based on the digital terrain model of the area and the shaded view of the same relief. The method is applied in the Lefka Ori mountain range in Crete, and the results are compared to actual photo shootings in the same area. The digital relief visualization can assist in better comprehending the three-dimensional space and in efficiently managing the visual environment.
digital relief visualization, DTM, GIS, hillshading, terrestrial photogrammetry
 Kennie, J.M.T. & McLaren, A.R., Modelling for digital terrain and landscape visualisation. Photogrammetric Record, 12(72), pp. 711–745, 1988.
 McLaren,A.R.&Kennie,J.M.T.,Visualisationofdigitalterrainmodels:techniquesandapplications. Three DimensionalApplications in Geographical Information Systems,Taylor & Francis: New York, pp. 78–98, 1989.
 Ervin, S.M., Landscape visualization: progress and prospects. Proc. of the ESRI International Conference, San Diego, 2004.
 Montgomery, J. & Moore, C., Developing 3-D analyst enhancements using Open GL. Proc. of the ESRI International Conference, San Diego, 2004.
 Yu, H. & Shaw, S., Representing and visualizing travel diary data: a spatio-temporal GIS approach. Proc. of the ESRI International Conference, San Diego, 2004.
 Honjo, T. & Lim, E.M., Visualization of landscape by VRML system. Landscape and Urban Planning, 55(3), pp. 175–183, 2001.
 Ervin, S.M., Digital landscape modeling and visualization: a research agenda. Landscape and Urban Planning, 54(1–4), pp. 49–62, 2001.
 Lange, E., The limits of realism: perceptions of virtual landscapes. Landscape and Urban Planning, 54(1–4), pp. 163–182, 2001.
 Danahy,J.W.,Technologyfordynamicviewingandperipheralvisioninlandscapevisualization. Landscape and Urban Planning, 54(1–4), pp. 125–137, 2001.
 Meitner, M.J. & Gandy, R., Visualizing spatial forestry data: knowledge management in the 3rd dimension. Proc. of the ESRI International Conference, San Diego, 2004.
 Schmid, W.A., The emerging role of visual resource assessment and visualization in landscape planning in Switzerland. Landscape and Urban Planning, 54(1–4), pp. 213–221, 2001.
 Bryan, B., Physical environmental modeling, visualization and query for supporting landscape planning decisions. Landscape and Urban Planning, 65(4), pp. 237–259, 2003.
 Mandelbrot, B.B., The Fractal Geometry of Nature, W.H. Freeman and Company: New York, pp. 256–272, 1983.
 Tzelepis,N.,InvestigatingRepresentationMethodsforShadingTopographicReliefwithDigital Techniques, BA dissertation, Cartography Laboratory, Department of Rural & Surveying Engineering, NTUA, Athens, 1993 [in Greek].
 Kennelly, P.J. & Kimerling, A.J., Hillshading of terrain using layer tints with aspect-variant luminosity. Cartography and Geographic Information Science, 31(2), pp. 67–77, 2004.
 Imhof, E., Cartographic Relief Presentation, Walter de Gruyter: New York, pp. 166–193, 1982.
 Robinson, H.A., Sale, D.R., Morrison, L.J. & Muehrcke, C.P., Elements of Cartography, John Wiley & Sons: New York, pp. 164–191, 1984.
 De Floriani, L. & Magillo, P., Multiresolution terrain processing and visualization with VARIANT. Proc. Map Making and Visualization of Spatial Data in Social Sciences, Santa Barbara, CA, USA, 2002.
 De Floriani, L. & Magillo, P., Algorithms for visibility computation on terrains: a survey.
Environment and Planning B—Planning and Design, 30(5), pp. 709–728, 2003.
 Badekas, I., Photogrammetry, OEDB: Athens, 1984 [in Greek].
 Kraus, K., Photogrammetry, Ferd Dumnlers Verlag: Bonn, Germany, 1993.
 Smardon, C.R., Felleman, P.J. & Palmer, F.J., Decision making model for visual resource management and project review. Foundations for Visual Project Analysis, eds. R.C. Smardon, J.F. Palmer & J.P. Felleman, John Wiley & Sons: New York, pp. 21–35, 1986.
 Burrough, P.A., Principles of Geographical Information Systems for Land Resources Management, Clarendon Press: Oxford, pp. 52–54, 1986.
 Langford, J.M., The Camera Book, Severn Valley Press Limited: London, pp. 24–29, 1980.
 Felleman, P.J., Visual physiology. Foundations for Visual Project Analysis, eds. R.C. Smardon, J.F. Palmer & J.P. Felleman, John Wiley & Sons: New York, pp. 40–46, 1986.
 Felleman,P.J.,Landscapevisibility.FoundationsforVisualProjectAnalysis,eds.R.C.Smardon, J.F. Palmer & J.P. Felleman, John Wiley & Sons: New York, pp. 48–62, 1986.
 Lange,E.,Integrationofcomputerizedvisualsimulationandvisualassessmentinenvironmental planning. Landscape and Urban Planning, 30, pp. 99–112, 1994.
 USDA Forest Service, Landscape Aesthetics, US Government Printing Office: Washington, DC, Agriculture Handbook 701, 1995.