Mapping skills
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This document discusses key concepts in mapping skills including latitude and longitude which form a grid system to identify locations on Earth. It also describes the International Date Line, and different types of photographs used in mapping like landscape photographs, aerial photographs, and satellite images which can show weather conditions and infrared energy using color coding. A key is needed to understand what different colors represent in a satellite image, such as white showing beaches and dark blue showing deep bodies of water.
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Mapping skills
- 2. LATITUDES • Horizontal lines (east to west) • Divide the earth into northern and southern hemispheres • Measured in degrees North & South • Maximum possible latitude: 90 degrees (North & south poles)
- 3. LONGITUDES • Vertical lines (north to south) • Divide the earth into Eastern and western hemispheres • Measured in degrees East & West • Maximum possible longitude: 180 degrees
- 4. INTERNATIONAL DATE LINE • Opposite the prime meridian • Lies in the pacific ocean • Not a straight line • Separates two calendar days • Eastern hemisphere is one day ahead of the western hemisphere
- 5. PUTTING LATITUDES & LONGITUDES TOGETHER • Together they form a grid • Points of intersection are called coordinates • Used to tell locations • Latitude comes before longitude in locations
- 7. PHOTOGRAPHS • 3 types: Landscape photographs Aerial Photographs Satellite Images
- 8. SATELLITE IMAGES • Taken from satellites • Can be used to check weather conditions • Use color to show height differences • Record infrared energy • A key is necessary
- 9. KEY FOR A SATELLITE IMAGE COLOR FEATURES White-cream Beaches, sand dunes, sandy areas Yellow Areas with little vegetation cover Pink-red Trees, parks and lawns in urban areas Red-Magenta Forest (deep red) Dark blue to black Deep waters- oceans, rivers, dams or lakes