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The projection found on these maps, dating to 1511, was stated by John Snyder in 1987 to be the same projection as Mercator's. [6] However, given the geometry of a sundial, these maps may well have been based on the similar central cylindrical projection, a limiting case of the gnomonic projection, which is the basis for a sundial. Snyder ...
Map of Kaliningrad Oblast Angrapa River Kaliningrad is the only Russian Baltic Sea port that is ice-free all year and hence plays an important role in the maintenance of the country's Baltic Fleet. The oblast is mainly flat, as the highest point is the 230 m (750 ft) Gora Dozor hill near the tripoint of the Poland–Russia border / Lithuania ...
In cartography, a map projection is any of a broad set of transformations employed to represent the curved two-dimensional surface of a globe on a plane. [1] [2] [3] In a map projection, coordinates, often expressed as latitude and longitude, of locations from the surface of the globe are transformed to coordinates on a plane.
The result was that pro- and anti-slavery elements flooded into Kansas with the goal of voting slavery up or down, leading to bloody fighting. [14] An effort was initiated to organize Kansas for admission as a slave state, paired with Minnesota , but the admission of Kansas as a slave state was blocked because its proposed pro-slavery ...
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A map is universally closed if for any topological space the map : is closed. In the case that Y {\displaystyle Y} is Hausdorff, this is equivalent to requiring that for any map Z → Y {\displaystyle Z\to Y} the pullback X × Y Z → Z {\displaystyle X\times _{Y}Z\to Z} be closed, as follows from the fact that X × Y Z {\displaystyle X\times ...
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Piece valuations have no role in the rules of chess but are useful as an aid to evaluating a position. The best-known system assigns 1 point to a pawn, 3 points to a knight or bishop, 5 points to a rook and 9 points to a queen. Valuation systems, however, provide only a rough guide; the true value of a piece can vary significantly depending on ...