What are conventional signs in topographic maps?
Brown – Contour lines, their numbering, form lines, sand features and barren rocky areas such as hills and dunes are represented in brown. Green – Wooded and forested areas shown as green wash, orchards, scattered trees and scrubs shown by green symbols. Yellow – Cultivated areas are shown as yellow wash.
How many topographic map symbols are there?
Contour lines are distinctive to the topographic maps but there are other features shown on the maps including buildings, water and vegetation. In fact, there are nearly 200 features represented by unique symbols and separated into color groups.
What do the five colors represent on a topographical map?
Topographic Map Colors The color brown is used to denote most contour lines on a map, which are relief features and elevations. Topographic maps use green to denote vegetation such as woods, while blue is used to denote water features like lakes, swamps, rivers, and drainage.
What are the conventional signs?
Conventional Signs. The common symbols including letters that are used for representing various relief and cultural features are called conventional signs.
What is a conventional symbol?
Conventional symbols are symbols that are often used in the same way and are therefore easily recognized and understood by many. Thus the cross is recognized in Western culture as a symbol of Christianity, night and winter symbolize death, roses symbolize love and so on.
Why are symbols important on a topographic map?
A topographic map shows more than contours. The map includes symbols that represent such fea- tures as streets, buildings, streams, and vegetation. These symbols are con- stantly refined to better relate to the features they represent, improve the appearance or readability of the map, or reduce production cost.
What do blue symbols represent on a topographic map?
The colors of the lines usually indicate similar classes of information: topographic contours (brown); lakes, streams, irrigation ditches, and other hydrographic features (blue); land grids and important roads (red); and other roads and trails, railroads, boundaries, and other cultural features (black).
What does GREY represent on a topographic map?
The first step in learning how to read a topographic map is to understand how to interpret the lines, colors and symbols. On these maps, you’ll see large expanses of green for vegetation, blue for water and gray or red for densely built up areas.
What does blue mean on a topographic map?
lakes
The colors of the lines usually indicate similar classes of information: topographic contours (brown); lakes, streams, irrigation ditches, and other hydrographic features (blue); land grids and important roads (red); and other roads and trails, railroads, boundaries, and other cultural features (black).
What are conventional maps?
The signs and symbols use in a map are called as Conventional symbols. Conventional symbols are widely accepted signs or sign systems which signify an idea or concept. They represent different features on a map and are not drawn to scale.