LocatingPlacesonMaps--GridReference（格网座标）.ppt

* Locating Places on Maps -- Grid Reference (格網座標) Look at the relief map of H.K. Can you tell the location of Tai Mo Shan X Look at the seating plan of your classroom Can you tell the location of Carol’s seat in the classroom? What is grid reference? 26 25 24 23 22 21 10 11 12 13 14 15 16 A grid is a set of numbered vertical and horizontal lines which cross each other. Grid reference is a number which represents the location of a place on a grid. 26 25 24 23 22 21 10 11 12 13 14 15 16 Naming grid lines on maps Map 1 10 26 25 24 23 22 21 11 12 13 14 15 16 The vertical lines are numbered from west to east. The vertical lines are called eastings (東行線). The horizontal lines are numbered from south to north. The horizontal lines are called northings (北行線). Map 1 10 26 25 24 23 22 21 11 12 13 14 15 16 Grid reference is formed by the intersection of an easting and a northing. To tell the position of a place, we put the easting first and then northing. How to read a grid reference? Map 1 10 26 25 24 23 22 21 11 12 13 14 15 16 Example: The 4 - figure grid reference (grid square) of pig farm 3 is 1324 Exercise 1: Complete the table. Pig Farm 1 and 2 1224 Ah jing’s home 1425 12 23 1223 15 23 1523 Map 1 10 26 25 24 23 22 21 11 12 13 14 15 16 Example: The 4 - figure grid reference (grid square) of pig farm 3 is 1324 Exercise 2: Draw the following things on the map 1 Map 1 10 26 25 24 23 22 21 11 12 13 14 15 16 *