The Unit is divided into TWO Parts : Part 1: Definition and types of maps. Understanding maps. Significance of projections, marginal information, symbols, lettering and scale. Topographical maps; landforms, slopes and profiles, stream geometry, river basin analysis, settlements, land use and communications. Planning and construction of statistical maps and diagrams. Aerials photographs: use, types and interpretation of aerial photographs. Geological maps: use of geological maps, simple geological sections, bed thickness, dips and strikes. Part II: Introduction to statistical Methods for Geographers: definition, concepts, nature, scope and limitations of statistics. Types, sources and measurement of geographical data. Elementary sampling methodology; reasons for sampling. Steps in sampling, simple random sampling, systematic random sampling and stratified random sampling. Statistical description of data; frequency tables, histograms, curves, polygons and ogives. Statistical measures of data; measures of central tendency, measures of variability and dispersion, skewness and kurtosis.