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The document is a lab manual for a Physical Geography course (GPH111) focused on understanding the geographic grid system, specifically latitude and longitude, and calculating time differences across various locations. It includes instructions for plotting coordinates on a grid, identifying geographical features, and solving problems related to time zones based on Earth's rotation and the establishment of the Prime Meridian and International Date Line.

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What is the introduction of geographic grid?

The geographic grid refers to the internationally-recognized system of latitude and longitude used to location positions on Earths surface. Accurate use of this coordinate system is fundamental to the science of geography, which relies so heavily on maps as a medium of communication and analysis.

What is the highest longitude number in the geographic grid?

Lines of longitude are numbered east of the prime meridian from 0 to 180 east longitude and west from 0 to 180 west longitude. There is no longitude higher than 180, and the 180th meridian east and the 180th meridian west are identical.

How do we use the geographic grid?

The geographical grid system works as a locational matrix. The intersections of lines of latitude (y) and longitude (x) enable us to determine absolute locations, or a numerical address on Earth (the coordinates are symbolized as first latitude then longitude. Example: 33N, 118W).

Which parts of the geographic grid do time zones generally correlate with?

There are a few determining factors of time zones, but mostly time zones are based on the lines of longitude of the Earth and the Prime Meridian, which is the starting point, or zero-degree, line of longitude.

What is the highest value of longitude?

Values. Longitude is given as an angular measurement with 0 at the Prime Meridian, ranging from 180 westward to +180 eastward.

What is the highest longitude number?

Points are measured east or west of the prime meridian until one reaches the opposite side of the prime meridian, which is referred to as the International Date Line. This is considered 180o longitude, and is the highest value which longitude can take.

What is the maximum longitude for geolocation?

Longitude ranges from 0 to 180 East and 0 to 180 West. The longitude angle is measured from the center of the earth as shown in the earth graphic to the right.

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