TOPOGRAPHIC MAPS

TOPOGRAPHIC MAPS

1. PHYSICAL FEATURES

   • Feature which are naturally formed on land
     • These features are divided into 4
       • Relief features
         • contour lines
           • places of equal height are marked and the lines are connected
           • contour line intervals is 20m. Between index contour lines 20m intervals are drawn in light brown
           • in moutaneous areas index contour lines 100,200, 300 are drwan thick in dark brown
             • values of intermediate contour lines inderined by the interval between the index lines
               • When the gap between contour lines is wide spot height is shown to get elevation of region
         • Identifying Relief Features
           • Plain
             • A wide gap between contour lines
             • few contour lines
             • the change of height here and can be seen by the spot height
           • Undulating land
             • it is a region of a plain tha has low & higher lands
             • found in coastal areas
             • can be identified on maps by the location of contour lines that show the scattered high lands between two contour lines with wide intervals
           • High lands
             • It is the region with a higher elevation
             • more contour lines in high lands & they are very close to each other
             • Valley
               • An elongated low land area located between two high lands with a flowing river
               • There are wide valleys in low land & narrow valleys in high lands
               • Contour lines extend in a V shape towards the high lands
             • spurs
               • the part os high land that extends towards low lands with contour lines
       • Drainage Features
       • Coastal Features
       • Natural Features

Imagens e arquivos do mapa