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# Splash Screen - PowerPoint PPT Presentation

Splash Screen. Globes and Maps Projections Determining Location Reading a Map Physical Maps Political Maps Thematic Maps Geographic Information Systems. GEO HB Menu. Globes and Maps.

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Presentation Transcript

Globes and Maps

Projections

Determining Location

Physical Maps

Political Maps

Thematic Maps

Geographic Information Systems

Globes and Maps

• A globe is a scale model of the Earth that presents the most accurate depiction of geographic information such as area, distance, and direction.
• A printed map is a symbolic representation of all or part of the planet.
Geography Handbook

From 3-D to 2-D

• To create maps that are not interrupted, mapmakers, or cartographers, use mathematical formulas to transfer information from the three-dimensional globe to the two-dimensional map.
Geography Handbook

Great Circle Routes

• A great circle is an imaginary line that follows the curve of the Earth and represents the shortest distance between two points.
• Traveling along a great circle is called following a great circle route.
Geography Handbook

Projections

• To create maps, cartographers project the round Earth onto a flat surface—making a map projection.
• Distance, shape, direction, or size may be distorted by a projection.
• The three basic categories of map projections are planar,cylindrical,and conic.
Geography Handbook

Projections (cont.)

Planar Projection

A planar projection shows the Earth centered in such a way that a straight line coming from the center to any other point represents the shortest distance. Also known as an azimuthal projection, it is most accurate at its center. As a result, it is often used for maps of the Poles.

Geography Handbook

Projections (cont.)

Cylindrical Projection

A cylindrical projection is based on the projection of the globe onto a cylinder. This projection is most accurate near the Equator, but shapes and distances are distorted near the Poles.

Geography Handbook

Projections (cont.)

Conic Projection

A conic projection comes from placing a cone over part of a globe. Conic projections are best suited for showing limited east-west areas that are not too far from the Equator. For these uses, a conic projection can indicate distances and directions fairly accurately.

Geography Handbook

Common Map Projections

Most general reference world maps are the Winkel Tripel projection. It provides a good balance between the size and shape of land areas as they are shown on the map. Even the polar areas are depicted with little distortion of size and shape.

Geography Handbook

Common Map Projections (cont.)

An interrupted projection resembles a globe that has been cut apart and laid flat. Goode’s Interrupted Equal-Area projection shows the true size and shape of Earth’s landmasses, but distances are generally distorted.

Geography Handbook

Common Map Projections (cont.)

The Robinson projection has minor distortions. The sizes and shapes near the eastern and western edges of the map are accurate, and outlines of the continents appear much as they do on the globe. However, the polar areas are flattened.

Geography Handbook

Common Map Projections (cont.)

The Mercator projection increasingly distorts size and distance as it moves away from the Equator. However, Mercator projections do accurately show true directions and the shapes of landmasses, making these maps useful for sea travel.

Geography Handbook

Determining Location

• The basic tool for answering the question “Where?”is location.
• A grid system on maps and globes helps you find exact places on the Earth’s surface.
• A hemisphere is one of the halves into which the Earth is divided. Most places are located in two of the four hemispheres.
Geography Handbook

Determining Location (cont.)

Latitude

Lines of latitude, or parallels, circle the Earth parallel to the Equator and measure the distance north or south of the Equator in degrees. The Equator is measured at 0° latitude, while the Poles lie at latitudes 90°N (north) and 90°S (south). Parallels north of the Equator are called north latitude. Parallels south of the Equator are called south latitude.

Geography Handbook

Determining Location (cont.)

Longitude

Lines of longitude, or meridians, circle the Earth from Pole to Pole. These lines measure distance east or west of the Prime Meridianat 0° longitude. Meridians east of the Prime Meridian are known as east longitude. Meridians west of the Prime Meridian are known as west longitude. The 180° meridian on the opposite side of the Earth is called the International Date Line.

Geography Handbook

Determining Location (cont.)

The Global Grid

Every place has a global address, or absolute location. You can identify the absolute location of a place by naming the latitude and longitude lines that cross exactly at that place. For example, Tokyo, Japan, is located at 36°N latitude and 140°E longitude. For more precise readings, each degree is further divided into 60 units called minutes.

Geography Handbook

Determining Location (cont.)

Northern and Southern Hemispheres

The diagram shows that the Equator divides the Earth into the Northern and Southern Hemispheres. Everything north of the Equator is in the Northern Hemisphere. Everything south of the Equator is in the Southern Hemisphere.

Geography Handbook

Determining Location (cont.)

Eastern and Western Hemispheres

The Prime Meridian and the International Date Line divide the Earth into the Eastern and Western Hemispheres. Everything east of the Prime Meridian for 180° is in the Eastern Hemisphere. Everything west of the Prime Meridian for 180° is in the Western Hemisphere.

Geography Handbook

Key

Title

Scale Bar

Compass Rose

Capitals

Boundary Lines

Cities

Geography Handbook

Using Scale

• All maps are drawn to a certain scale.
• Scale is a consistent, proportional relationship between the measurements shown on the map and the measurement of the Earth’s surface.
Geography Handbook

Using Scale (cont.)

Small-Scale Maps

A small-scale map, like this political map of France, can show a large area but little detail.

Geography Handbook

Using Scale (cont.)

Large-Scale Maps

A large-scale map, like this map of Paris, can show a small area with a great amount of detail.

Geography Handbook

Absolute and Relative Location

• Absolute location is the exact point where a line of latitude crosses a line of longitude.
• Relative location is the location of one place in relation to another.
Geography Handbook

Physical Maps

• A physical map shows the location and the topography, or shape of the Earth’s physical features.
• A study of a country’s physical features often helps to explain the historical development of the country.
Geography Handbook

Physical Maps (cont.)

Water Features

Landforms

Relief and Elevation

Political Features

Geography Handbook

Political Maps

• A political map shows the boundaries and locations of political units such as countries, states, counties, cities, and towns.
• Many features depicted on a political map are human-made, or determined by humans rather than by nature.
• Political maps can show the networks and links that exist within and between political units.
Geography Handbook

Political Maps (cont.)

Physical Features

Nonsubject Area

Geography Handbook

Thematic Maps

• Maps that emphasize a single idea or a particular kind of information about an area are called thematic maps.
• There are many kinds of thematic maps, such as climate, natural vegetation, population density, and economic activities maps.
Geography Handbook

Thematic Maps (cont.)

Qualitative Maps

Qualitative maps use colors, symbols, lines, or dots to show information related to a specific idea. Such maps are often used to depict historical information.

Geography Handbook

Thematic Maps (cont.)

Flow-Line Maps

Flow-line maps illustrate the movement of people, animals, goods, and ideas, as well as physical processes like hurricanes and glaciers. Arrows are usually used to represent the flow and direction of movement.

Geography Handbook

Geographic Information Systems

• Most cartographers use computers with software programs called geographic information systems (GIS).
• A GIS is designed to accept data from different sources — maps, satellite images, printed text, and statistics.
• Cartographers then program the GIS to process the data and produce maps.
• This technology allows cartographers to make maps—and change them—quickly and easily.
Geography Handbook

globe

a spherical representation of the Earth

Vocab1

map

a representation, usually on a flat surface, of the whole or part of an area

Vocab2

cartographer

one that makes maps

Vocab3

great circle route

an imaginary line that follows the curve of the Earth and represents the shortest distance between two points

Vocab4

map projection

a mathematical formula used to represent the curved surface of the Earth on the flat surface of a map

Vocab5

planar projection

a map created by projecting an image of the Earth onto a plane

Vocab6

cylindrical projection

a map of Earth created by projecting Earth’s image onto a cylinder

Vocab7

conic projection

a map of the Earth created by placing a cone over part of an Earth model

Vocab8

interrupted projection

a map of the Earth in which the Earth’s surface appears cut along arbitrary lines, each section projected separately

Vocab9

location

a specific place on the Earth

Vocab10

grid system

pattern formed as the lines of latitude and longitude cross one another

Vocab11

hemisphere

half of a sphere or globe, as in the Earth’s Northern and Southern Hemispheres

Vocab12

latitude

distance north or south from the equator measured in degrees

Vocab13

longitude

distance measured by degrees or time east or west from the Prime Meridian

Vocab14

Prime Meridian

the meridian of 0 degrees longitude from which other longitudes are calculated

Vocab15

absolute location

the exact position of a place on the Earth’s surface

Vocab16

Northern Hemisphere

the half of the Earth that lies north of the Equator

Vocab17

Southern Hemisphere

the half of the Earth that lies south of the Equator

Vocab18

Eastern Hemisphere

the part of Earth east of the Atlantic Ocean including Europe, Asia, Australia and Africa; longitudes 20°W and 160°E often considered its boundaries

Vocab19

Western Hemisphere

the part of Earth west of the Atlantic Ocean comprising North and South America and surrounding waters; longitudes 20°W and 160°E often considered its boundaries

Vocab20

scale

the size of a picture, plan, or model of a thing compared to the size of the thing itself

Vocab21

relative location

location in relation to other places

Vocab22

physical map

map that shows the location of natural features such as mountains and rivers; it can also show cities and countries

Vocab23

topography

shape of the Earth’s physical features

Vocab24

political map

a map that shows the boundaries and locations of political units such as countries, states, counties, cities, and towns

Vocab25

made by humans rather than by nature

Vocab26

thematic maps

map that emphasizes a single idea or a particular kind of information about an area

Vocab27

qualitative maps

maps that use colors, symbols, lines, or dots to show information related to a specific idea

Vocab28

flow-line maps

map that shows the movement of people, animals, goods, ideas, and physical processes like hurricanes and glaciers

Vocab29

geographic information systems (GIS)

computer tools for processing and organizing details and satellite images with other pieces of information

Vocab30

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