Geoscience Australia develops and maintains topographic maps and data for a variety of applications. Changes to the landscape and cultural features regularly occur (such as roads, vegetation, and buildings), resulting in maps becoming dated, although the rate of obsolescence varies depending upon location. Therefore, a map will never be entirely up to date. It is important to note that a map is merely a two or three dimensional representation of the physical environment at a given time. Topographic maps usually show a geographic graticule and a coordinate grid, so you can determine relative and absolute positions of mapped features. vegetation: wooded and cleared areas, vineyards and orchards.Ī map legend (or key) lists the features shown on that map, and their corresponding symbols.relief: mountains, valleys, contours and cliffs, depressions.hydrography: lakes, rivers, streams, swamps, coastal flats.cultural: roads, buildings, urban development, railways, airports, names of places and geographic features, administrative boundaries, state and international borders, reserves.Topographic maps are detailed, accurate graphic representations of features that appear on the Earth's surface.
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