# TNOU - B.Sc., GEOGRAPHY (BGE)

 Updated: 11-Jan-2010 Category: Admissions Author: Sudhakar Member Level: Gold Points: 2

B.Sc., GEOGRAPHY I YEAR PRACTICAL I PRELIMINARY EXERCISES AND RELIEF STUDY

B.Sc., GEOGRAPHY
I YEAR
PRACTICAL I
PRELIMINARY EXERCISES AND RELIEF STUDY
Block I
Maps: Definition of a map – Types of maps – representation of scale on the map:
statement scale – graphic scale – Representative Fraction; construction of scales;
Comparative scale, time scale – diagonal scale.
Block II
Measurement of distances on maps: Instrumental method – thread method;
measurement of areas: graphical method – instrumental method. Enlargement and
reduction of maps – square method and similar triangle – combination of maps of
different scales;
Block III
Definition of Map Projections- Purpose- Types: Perspective and Non Perspective
UTM coordinates (Construction not needed)
Block IV
Representation of direction of maps: true north, grid magnetic north – magnetic
declination – bearings – true bearing and magnetic bearing – map setting in the field –
Block V
Representation of relief on maps: spot heights, benchmark, layer colouring,
hachures, hill shading and contours – interpolation of contours; contour exercises: section
drawing: Slopes, Hill, Mountain, Plateau, River Valley. Glacial Valley, Cirque, Pass and
Saddle, Waterfall, Cliff, Escarpment and Spur.

Reference: http://tnou.ac.in/index_files/Syllabus/UG/SOPPA/B.SC.Geography.pdf

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