Presentation on theme: "CE / AL Geography Map Reading Skills and Techniques."— Presentation transcript:
CE / AL Geography Map Reading Skills and Techniques
Major skills and techniques Read and interpret variety of maps at different scales (1:20 000 and 1:5 000). Interpret ground and aerial photographs to extract and analyze geographical information from them
What kinds of basic skills have been tested before? Drawing a transect (AL-98, 04)transect Drawing a sketch map (AL-99, 03, 05 + CE-05)sketch map Drawing a cross-section (AL-01, 02)cross-section Giving map evidence (AL-98, 99, 02, 03, 04, 05, 06 + CE-05, 06)
(Land-use) transect Shows the land-use distribution Along a line Between 2 points
Types of land uses in urban landscapes R – residential, e.g. houses C – commercial, e.g. offices I – industrial, e.g. factories T – transportation, e.g. railway station In – institutional, e.g. schools Rc – recreational, e.g. parks V – vacant / open space, e.g. construction site
Types of land uses in rural landscapes C – cultivated land W – woodland G – grass / shrubs V – vacant / abandoned land
How to draw a transect? Identify the 2 points. Connect the 2 points with a straight line. Use a strip of paper and mark the land uses on it. Add a key and a title. R Rc TRW A land-use transect from A to B A B
Example: Draw a land-use transect from point A to point B shown in the photograph. (AL-2004) (4 marks) F I O T OR W A land-use transect from A to B Key: I: industrial O: open space T: transportation R: residential W: woodland F: waterfront A B
Extract information from both photograph and the map. Yau Tong Estate MTR Station Factories / warehouses Construction sites / open space for car parks
Points to pay attention when drawing a transect The length of the transect must be the same as the distance between 2 points. The land use types instead of the objects should be mentioned, e.g. write institutional land use rather than school / educational land use. You should have a clear concept about various types of land uses.
Sketch map A simplified map Showing specific information, e.g. transport routes, contour or land use With the same / different scale from the map extract With a title, a key and direction.
Example: Draw a sketch map to show the major land uses in grid squares 1086, 1087, 1088, 1186, 1187 and 1188. (AL-2003) (4 marks)
Points to pay attention when drawing a sketch map. Read the questions carefully if the sketch maps are drawn in the same or a different scale from the map extract. Include only information as required by the question. Sketch the features roughly. Shade the land use in a simple way. Add a key and a title.
Cross section / River profile Horizontal scale (HS) of the cross section must be the same as the map extract. Vertical scale (VS) depends on vertical exaggeration (VE). If the HS is 1:20000, with VE of 4 times, the VS should be 1:5000. The vertical interval of the cross section must refer to the map.
Points to pay attention when drawing a cross section. Clearly identify the 2 points. Read the height of the 2 points carefully. If several points have the same height, don’t draw a straight horizontal line to connect all points. Decide what parts o f the line are ups and downs. Mark the features clearly by using a key, e.g. R – river.