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This image illustrates various cartographic projections used to represent the spherical Earth on flat surfaces. The plate features six detailed globes that demonstrate the principles behind vertical, horizontal, and oblique projections. These projections form the conceptual basis for creating spherical maps, such as those in the atlas. Additionally, the table includes smaller diagrams comparing hemispherical maps, highlighting the relationships between different regions and their global placements.
Summary of the Notes:
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"Légende Explicative": This note explains the methodology and rationale behind the creation of the spherical maps depicted. It describes how the globe is divided into two hemispheres by a perpendicular plane, with the resulting views representing either the polar, equatorial, or other regional perspectives. The author emphasizes the utility of these projections in producing maps that retain geometric fidelity while representing the Earth's curvature. The hemispherical divisions enable a logical approach to creating maps of specific regions (e.g., Africa, Europe, or the Americas), ensuring clear visualization of spatial relationships.
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"Note Supplémentaire": This section provides a detailed technical account of the processes used to derive the projection outlines. It discusses the mathematical and geometric principles, such as dividing the sphere into equal segments and projecting them along various axes. Specific methods, such as tracing ellipses and aligning reference points, are elaborated to demonstrate how precise and consistent projections are achieved. The note also suggests that these methods enhance the scientific accuracy and aesthetic harmony of the maps, reflecting the innovative approach of the atlas creators.
In sum, the accompanying notes aim to clarify the scientific and artistic underpinnings of the atlas, offering insights into the sophisticated methods employed to balance geographic accuracy with visual clarity.
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