Ellipsoidal earth - PowerPoint PPT Presentation

GIS ’ s Roots in Cartography

GIS ’ s Roots in Cartography. Lecture 2 Introduction to GISs Geography 176A Department of Geography, UCSB Summer 06, Session B. Information can be organized as lists, numbers, tables, text, pictures, maps, or indexes. Clusters of information called data can be stored together as a database.

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Earth-map Relations

Earth-map Relations. Earth-map Relations. The earth Cartographic use of the sphere, ellipsoid and geoid Geographical coordinates Properties of the graticule Geodetic position determination.

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Map projections

Map projections. Balasubramani K. Earth Shape Models. Flat earth models Still used for plane surveying, (less than 10 km). Spherical earth models (Earth centered model) Global distance approximations. Spherical models fail to model the actual shape of the earth.

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