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Relief contour line definition8/12/2023 ![]() ![]() Hills and valleys are shaded as if the sun was shining from the north-west. As you read the contour numbers, you will be looking uphill.Īs well as contour lines, maps also show relief shading to help visualise the terrain. Contour lines that are far apart show that the land has gentle slopes. Contour lines that are close together show steep land. These lines join points of equal height and represent the relief or height of the land. Symbols are grouped in themes on the legend. Given the size of the map it is not possible to show all features on the ground. ![]() These features include roads, tracks, rivers, lakes, vegetation, fences, buildings, power lines etc. The legend on a map shows the symbols used to represent features on the ground. This shows the direction of Grid North and Magnetic North and is used to orient the map. Topographic maps include a north point in the map margin information. outdoor activities for example tramping, climbing, hunting, caving, cycling, orienteering.search and rescue and emergency services.They are useful for a wide range of activities, such as Topo50 maps show geographic features in detail. These maps are useful for planning travel over large distances, or for giving an overview of New Zealand. LINZ also produces smaller scale maps at 1:250 000, 1:500 000, 1:1 million and 1:2 million scales. ![]() These maps are at a scale of 1:50 000 which means one centimetre on the map represents 50 000 centimetres, or 500 metres on the ground. In New Zealand topographic maps are made by Land Information New Zealand (LINZ). A small scale map shows less detail than a larger scale map. The level of detail shown on maps depends on the scale of the map. This fixed point is called a geodetic datum and for New Zealand is based on the Earth's centre of mass. vegetation - wooded and cleared areas, vineyards and orchardsīefore the features from the Earth's curved surface can be shown on a flat map, the position of a constant point is needed.relief - mountains, valleys, slopes and depressions.hydrography - lakes, rivers, streams, swamps and tidal flats.cultural - roads, buildings, urban development, railways, airports, names of places and geographic features.FeaturesĪ topographic map shows the following features The aspect of a particular slope can be determined by examining the height and pattern of contour lines.Topographic Maps are helpful in the high country because they show land features and terrain. Aspect: Refers to the direction that a slope faces.Landform Shading: Colours can be used on maps, with colours darkening as elevation (height) increases (image below).When it is used in combination with spot heights, and sometimes landform shading, layer contouring can tell you a good deal about the shape of the land. ![]()
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