The Web Mercator projection is a projection of a relatively recent date. There has been a lot of controversy about its application. Some believe that this projection is not a projection of either the ...sphere or the surface of the ellipsoid. Therefore, in this paper, several projections of the surface of a rotational ellipsoid into a plane are investigated and it is shown that the Web Mercator projection is one of such projections. Namely, although the equations of this projection are identical to the equations for the projection of the sphere, the basic difference is in the choice of the area of definition, i.e., the domain of the projection. Furthermore, we have shown that the Web Mercator projection can also be interpreted as double mapping: mapping an ellipsoid to a sphere according to the normals and then mapping the sphere to the plane according to the formulas of the Mercator projection for the sphere. The Web Mercator projection is not a conformal projection, but it is close in properties to the Mercator projection.
Web-Mercatorova projekcija je projekcija relativno novijeg datuma o čijoj je primjeni bilo dosta kontroverzija. Neki smatraju da ta projekcija nije projekcija ni sfere ni plohe elipsoida. Stoga je u ovom radu istraženo nekoliko projekcija plohe rotacijskog elipsoida u ravninu i pokazano da je web-Mercatorova projekcija jedna od takvih projekcija. Naime, premda su jednadžbe te projekcije istovjetne jednadžbama za projekciju sfere, osnovna je razlika u odabiru područja definicije, odnosno domene projekcije. Nadalje, pokazali smo da se web-Mercatorova projekcija može interpretirati i kao dvostruko preslikavanje: preslikavanje elipsoida na sferu po normalama te preslikavanje sfere u ravninu po formulama Mercatorove projekcije za sferu. Web-Mercatorova projekcija nije konformna projekcija, ali je po svojstvima bliska Mercatorovoj projekciji.
The Croatian Cartographic Society and Faculty of Geodesy, University of Zagreb organised the 13th International Conference on Geoheritage, Geoinformation and Cartography in Selce from 7-9 September ...2017.
It is commonly assumed that standard parallels and parallels that appear as the intersections of a developable surface and a sphere or ellipsoid coincide. This paper shows that this is not true of ...azimuthal projections which are equidistant along meridians, equidistant along parallels (orthographic), and equal-area, because there is no standard parallel at all in such projections. Only some azimuthal conformal (stereographic) projections have standard parallel, in which case it coincides with secant parallel.
The paper gives a historical account of how the Novi Vinodol astronomic point was created – a point which has been maintained until the present day as a second class trigonometric point. It is the ...end point of a chain of triangles set up in the early 20th century to establish the halfway parallel, i.e. the parallel corresponding to 45° latitude. The geometric and astronomic works were conceived and led by General Stevan P. Bošković, Director of the Military-Geographic Institute in Belgrade.
Map Projection Transitions Frančula, Nedjeljko; Lapaine, Miljenko
Kartografija i geoinformacije,
06/2013, Letnik:
12, Številka:
19
Book Review, Journal Article
Odprti dostop
Map Projection Transitions is a very successful web application about map projections. The web page ( http://www.jasondavies.com/maps/transition ) presents a world map with graticule and country ...borders in the oblique Aitoff projection, with the South Pole. The map is not static, but animated. The South Pole moves toward the bottom and Earth rotates around its poles. The animation lasts five seconds, after which the projection changes and movement continues for five seconds, after which the projection changes again. Names of projections appear in a separate window. There are a total of 56 projections. The South Pole eventually becomes invisible and the North Pole appears at the top. Various parts of Earth appear in the center of the map by rotating around the poles.
On June 19, 2017, Croatian Cartographic Society and the Faculty of Geodesy of the University of Zagreb organized a solemn academy on the occasion of Professor Emeritus Nedjeljko Frančula's 80th ...birthday. After Prof. Dr. Damir Medak, Dean of the Faculty of Geodesy welcomed all the guests, two lectures were held: -M. Lapaine: On Map Projections and Auxiliary Surfaces -D. Tutić and A. Kuveždić Divjak: World Maps and the Winkel Tripel Projection After the lectures, M. Lapaine read a brief biography of Professor Frančula, who thanked for the celebration and emphasized the key changes to cartography in recent years. Everyone in the audience congratulated Professor Frančula and there was also a small banquet.
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