Lab 3b Weather map Exercise (answer) PDF

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The Hong Kong Polytechnic University LSGI228/2280A Mapping 2014-2015 Semester 1 Laboratory Exercise 4b Regional Map Reading Exercise – Map Reading: Objective: to review information presented in a regional weather map and study the characteristics of the map projection

Based on the regional weather map provided, determine the followings:

(a)

What kind of map projection is used in this map? Mercator Projection

(b)

In the map boundary, it stated that “Natural Scale 1:20 000 000 at Latitude 22½oN”. Why did it state this in this map? It means the scale along the latitude of 22½oN is 1:20 000 000. The areas that are not on that latitude, the map scale can vary from 1:20 000 000.

(c)

Observe the spacing of the graticule (the horizontal and vertical lines) on the map and comments what you find. For the horizontal lines, the distances between two adjacent pair of horizontal lines are increasing towards the north pole. For the vertical lines, the distances are constant on the entire map area.

(d)

Identify the following: i. ii. iii.

The unit of the isobar hPa The highest isobar value shown on map 1014 What will be estimated isobar value in Dongsha Dao? Between 1002 –

1004 (estimated 1003)...