What is legend in topographic map?
Map legend is a key to the symbols. It provides a complete listing of all the symbols used on the map and the corresponding features they represent. The legend can be located along the borders, below the map, or on the back of the map.
Why do topographic maps have a key or legend?
A map legend (or key) lists the features shown on that map, and their corresponding symbols. Topographic maps usually show a geographic graticule and a coordinate grid, so you can determine relative and absolute positions of mapped features. Therefore, a map will never be entirely up to date.
What does Topo mean on a map?
This is typically done with wavy lines that represent the curves and elevation of the land. Topographic is the adjective form of the noun topography, which refers to the surface features of land. Topographic maps are sometimes called topo maps for short.
What are the types of symbols used in the topographic map?
Topographic maps use symbols to represent natural and human constructed features found in the environment. The symbols used to represent features can be of three types: points, lines, and polygons. Points are used to depict features like bridges and buildings.
What does PF mean in topography?
provident fund is the full form of PF in map.
What do different colors mean on topo maps?
U.S. Geological Survey (USGS) topo- graphic maps are printed using up to six colors (black, blue, green, red, brown, and purple). Blue for water features. Red for highway classifications, built-up areas, fence lines, and U.S. Public Land Survey lines. Green for areas of woodland, scrub, orchards, and vineyards.
What are the main features of a topographic map?
Topographic maps are a detailed record of a land area, giving geographic positions and elevations for both natural and man-made features. They show the shape of the land the mountains, valleys, and plains by means of brown contour lines (lines of equal elevation above sea level).
Why a topographic map has a key?
Interpreting the colored lines, areas and other symbols is necessary in using the topographic maps. The USGS Topographic Maps use symbols or colors to represent features, and this Topographic Map Key explains what they mean. There are five (5) color plates which were used in the film-based reproduction process.
What is Topo sketch?
Topographical plans and maps are drawings which show the main physical features on the ground, such as buildings, fences, roads, rivers, lakes and forests, as well as the changes in elevation between land forms such as valleys and hills (called vertical relief).
What is a topographic feature?
Topography describes the physical features of an area of land. These features typically include natural formations such as mountains, rivers, lakes, and valleys. Manmade features such as roads, dams, and cities may also be included. Topography often records the various elevations of an area using a topographical map.
What are topo maps used for?
What are two important uses of topographic maps?
Topographic maps have many multiple uses in the present day: any type of geographic planning or large-scale architecture; earth sciences and many other geographic disciplines; mining and other earth-based endeavours; civil engineering and recreational uses such as hiking and orienteering.
What is a legend in a map?
A map legend is a description, explanation, or table of symbols printed on a map or chart to permit a better understanding or interpretation of it. Map legends usually contain information on the map scale as well.
What is topo map use for?
Topographic maps are used for engineering, energy exploration, natural resource conservation, environmental management, public works design, commercial and residential planning, and outdoor activities like hiking, camping, and fishing.
What is the definition of map legend?
A map legend or key is a visual explanation of the symbols used on the map. It typically includes a sample of each symbol (point, line, or area), and a short description of what the symbol means. For example, a short segment of a blue sinuous line may be labeled ‘rivers’.
What to look for on topo maps?
The cornerstone for all topo maps is the contour line. The vicinity of contour lines to one another indicates the elevation lost or gained on any slope aspect. Contour lines close together represent a steep increase or decrease in elevation, while lines further apart represent a gentle slope. Spaces with no lines indicate flat ground.