Results 211 to 220 of about 22,593 (256)
Some of the next articles are maybe not open access.
Modified perspective cylindrical map projection
Arabian Journal of Geosciences, 2013Some of the famous cylindrical projections are defined by a geometric process that is based on the perspective. This process can be imagined as a semitransparent sphere wrapped by a tube, secant, or tangent, with the same center; then all features of the sphere surface are projected onto the tube surface by light rays from a source in the equatorial ...
Ahmad H Alashaikh, Hasan M Bilani
exaly +2 more sources
A compromise aspect-adaptive cylindrical projection for world maps
International Journal of Geographical Information Science, 2015There are two problems with current cylindrical projections for world maps. First, existing cylindrical map projections have a static height-to-width aspect ratio and do not automatically adjust their aspect ratio in order to optimally use available canvas space. Second, many of the commonly used cylindrical compromise projections show areas and shapes
Bernhard Jenny +2 more
exaly +2 more sources
Transverse Cylindrical Stereographic and Conical Stereographic Projections
The American Cartographer, 1984Two new map projections have projection points with locations dependent upon the location of the area to be mapped. The projection surfaces are an elliptical cylinder tangent to the generating globe or spheroid along a central meridian and a cone tangent along a standard parallel.
exaly +2 more sources
Bounds for cylindrical projection codes
[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications, 2003Some methods for analyzing the error performance of cylindrical projection codes are proposed. The main features of these methods are the use of combinatorial generating functions to obtain the weight distribution of a cylindrical projection code, and the use of the weight distribution of a cylindrical projection code to obtain the upper bound and ...
G. Yang, D. Li, D.L. Schilling
openaire +1 more source
A COMBINED CYLINDRICAL PROJECTION
Survey Review, 1939AbstractThe projection in question is a mean between Mercator's and the Equal-Area Cylindrical Projection which is formed by orthographic projection from the sphere upon the circumscribing cylinder. Both projections are computed on the spherical assumption.
openaire +1 more source
Empire Survey Review, 1934
Abstract IT was customary at one time to regard cylindrical projections as degenerate and inferior types of conical projections, but in recent years the former have generally been preferred to the latter.
openaire +1 more source
Abstract IT was customary at one time to regard cylindrical projections as degenerate and inferior types of conical projections, but in recent years the former have generally been preferred to the latter.
openaire +1 more source
Double projective cylindrical texture mapping on FPGA
Proceedings of the 2006 ACM international conference on Virtual reality continuum and its applications, 2006Image-based modeling and rendering (IBMR) techniques have been used to construct three-dimensional virtual scenes applied for VR applications by warping several two-dimensional images with depth information. In this paper, a novel approach of IBMR with depth information called double projective cylindrical texture mapping method (DPCM) is presented and
Xiaoying Li, Baoquan Liu, Enhua Wu
openaire +2 more sources
An Improvement of the Projection Operator in Cylindrical Algebraic Decomposition
Proceedings of the international symposium on Symbolic and algebraic computation, 1990The Cylindrical Algebraic Decomposition (CAD) method of Collins [5] decomposes r-dimensional Euclidean space into regions over which a given set of polynomials have constant signs. An important component of the CAD method is the projection operation: given a set A of r-variate polynomials, the projection operation produces a set P of (r - 1)-variate ...
openaire +1 more source
Cylindrical projection conformality of triaxial ellipsoid
Doklady Earth Sciences, 2013It is proved that the projection of a triaxial ellipsoid with rectilinear meridians orthogonal to the rectilinear equator cannot be strictly conformal. The proof is based on the fact that due to the degeneration of the horizontal coordinate in latitude the relation between arc differentials in the projection depends linearly on the relation between the
M. E. Fleis +2 more
openaire +1 more source
Unfolded Cylindrical Projection for Rib Fracture Diagnosis
2018The recommended exam for assessing chest trauma is a computed tomography (CT) chest scan. Using multi-planar reconstructions to evaluate a CT volume to assess the ribcage is a tedious and time-consuming task. We have designed an application that provides an automatically rendered unfolded unobstructed view of the entire ribcage using an unfolded ...
Catalina Tobon-Gomez +10 more
openaire +1 more source