Unipolar Anamorphosis and its use in Accessibility Analyses

The paper deals with cartographic visualisation of results of transport accessibility monitoring with the use of a semiautomated method of unipolar anamorphosis, developed by the authors in the GIS environment. The method is based on transformation of distance in the map to values of a geographical phenomenon. In the case of time accessibility it is based on transformation of isochrones converted into the form of concentric circles, taking into account selected topographic and thematic elements in the map. The method is most suitable for analyses of accessibility to or from a centre and for modelling its long-term context. The paper provides a detailed analysis of the procedures and functionality of the method, discussing the issues of coordinates, transformation, scale and visualisation. It also offers a discussion of possible problems and inaccuracies. A practical application of the method is illustrated by previous research results by the authors in the filed of accessibility in Czechia.

[1] V. Novy, Isochronicka mapa Cech - s uvodem o izochronach vubec.
Prague, CZ, Zemepisna knihovna, 1904.
[2] K. Spiekermann, M. Wegener ÔÇ×Trans-European Networks and Unequal
Accessibility in Europe," EUREG, vol. 4, pp. 35-42, 1996.
[3] J. Brimberg, J.H. Walker, R.F. Love ÔÇ×Estimation of travel distances with
weighted lp norm: Some empirical results." Journal of Transport
Geography, vol. 1, pp. 62-72., 2007.
[4] M. Marada, T. Hude─ìek ÔÇ×Accessibility Of Peripheral Regions: A Case of
Czechia", Europa XXI, vol. 15., pp. 43-51, 2006.
[5] T. Hudecek, Dostupnost v Cesku v obdobi 1991-2001. Prague, CZ,
Charles University, 2010.
[6] N. Spence, B. Linneker ÔÇ×Evolution of the motorway network and
changing levels of accessibility in Great Britain. Journal of Transport
Geography", vol. 2, pp. 247-264, 1994.
[7] S. Moryadas, J. Lowe, The Geography of Movement. Boston, US,
Houghton Mifflin Company, 1975.
[8] J.S. Brainard, A.A. Lovett., I.J. Batemann ÔÇ×Using isochrone surfaces in
travelcost models," Journal of Transport Geography, vol. 2, pp. 117-
126, 1997.
[9] S. Hanson, The Geography of Urban Transportation - second edition.
London, UK, The Guilford Press, 1995.
[10] I.B. Thomson ÔÇ×High-speed transport hubs and Eurocity status: the case
of Lyon," Journal of Transport Geography, vol. 1., pp. 29-37, 1995.
[11] J. Gutierrez, P. Urbano ÔÇ×Accessibility in the European Union: the impact
of the trans-European road network." Journal of Transport Geography,
vol. 1, pp. 15-25, 1996.
[12] M. Taylor, P. Bonsall, W. Young, Understanding Traffic Systems: Data,
Analysis and Presentation - second edition. US, Ashgate Publishing
Company, 2000.
[13] D. Janelle ÔÇ×Metropolitan Expansion, Telecommuting and
Transportation," In: Hanson, S. (ed.): The Geography of Urban
Transportation - second edition. pp. 407-434, 1995.
[14] D. Adler, D. Janelle, A. Philbrick, J. Sommer, Human Geography in a
shrinking world. Mass., US, Duxbury press, 1975.
[15] N. Ahmed, H.J. Miller ÔÇ×Time-space transformations of geographic space
for exploring, analyzing and visualizing transportation systems. Journal
of Transport Geography, vol. 1. pp. 2-17, 2007.
[16] Z. Murdych, Metody anamorfozy mapy pro geograficke ucely. Prague,
CZ, Charles University, 1993.
[17] W. Tobler ÔÇ×Thirty Five Years of Computer Cartograms." Annals of the
Association of American Geographers, vol. 1, pp. 58-73. 2004.
[18] W. Bunge, Theoretical Geography. First Edition. Lund, Sweden,
C.W.K. Gleerup, 1962.
[19] J. Olson ÔÇ×Noncontiguous area cartograms." The Professional
Geographer, vol. 4, pp. 371 - 380, 1976.
[20] W. Tobler, Map transformation of geographic space. US, Washington,