Concept 2: Contour maps and topographic maps

Concept 2: Contour maps and topographic maps

Concept 2: Contour maps and topographic maps Read: dont write this part.. Big Idea: From NYS Standards for Earth Science: Key Idea 2:

Many of the phenomena that we observe on Earth involve interactions among components of air, water, and land. 2.1q Topographic maps represent landforms through the use of contour lines that are isolines connecting points of equal elevation. Gradients and profiles can be determined from changes in elevation over a given distance. Field Maps 1. Field maps are localized maps that show one aspect of the area using isolines and

symbols. (In Earth Science, field maps are used to show elevation, weather variables, pollutants, earthquake intensity, etc.) 2. Map keys and symbols: a. A map scale is used to measure distance on the map. b. A map legend or key identifies the meaning of symbols on a map.

c. Relief indicates the change on the map from greatest to least field value. 3. Contour Maps: field maps that show elevation. a. Contour maps use contour lines (isolines) to indicate landscape changes. b. The contour interval between the isolines must always be constant, and is usually measured in feet or meters.

c. Contour lines spaced far apart indicate flat land. Those close together indicate steep ground. continued d. Closed loops indicate hills. Long closed loops indicate ridges. e. The maximum possible elevation inside a closed loop is one less than whatever another contour line would be.

f. Depressions (or basins) are shown using hachure lines. The first hachure line has the same value as the last contour line. g. The direction a river flows can be interpreted two ways on a contour map: i. The contour lines make a v shape that points uphill. ii. elevation indicates which way is

downhill h. Sea level always has an elevation of 0. Elevations below sea level are indicated by negative numbers. http://www.visualentities.com/contour.htm http://www.sir-ray.com/Topographic%20Map%20Lab.htm 4. Finding gradient: see p. 1ESRT a. On a contour map, the gradient indicates the change in elevation (y value) over the

distance (x value). b. Units are very important in gradient problems. For contour maps, the gradient units will usually be meters/kilometers (m/km) or feet/ miles (ft/mi) 5. profile maps use the contour lines of a flat map to show a side view of a cross-section a. The steps to making a profile require

visuals and practice: http://user.gs.rmit.edu.au/caa/topo/ contours.htm http://rst.gsfc.nasa.gov/Sect11/Sect11_2.html Vertical exaggeration refers to how much the elevation has been exaggerated on the y axis to make the change visible over horizontal distance: 6. Topographic Maps: contour maps that use

a coordinate system, map scale and key and symbols to indicate landforms and manmade structures. a. Technology has greatly improved topographic maps. b. In the United States, the United States Geologic Survey (USGS) has made USGS Quadrant maps of the entire country. c. The USGS Quadrant maps use coordinate

systems, including latitude and longitude, to indicate the map location in the world. d. Symbols used on these maps are standardized to show vegetation, types of structures, roads, etc. e. Topographic maps are used for planning and to track problems and changes.

Recently Viewed Presentations

  • Cells and Metabolism Big Ideas L.O. 1.15  The

    Cells and Metabolism Big Ideas L.O. 1.15 The

    g. The electron transport chain captures free energy from electrons in a series of coupled reactions that establish an electrochemical gradient across membranes. 1. Electron transport chain reactions occur in chloroplasts (photosynthesis), mitochondria (cellular respiration) and prokaryotic plasma membranes.
  • Syntezátory - webzdarma

    Syntezátory - webzdarma

    Syntezátory Tomáš Kahl Telharmonium v roce 1897 jej patentoval kanadský vědec Thaddeus Cahill přístroj měl cenu kolem 200 000 $, vážil 200 tun, a zabíral 18m2 jako oscilátory pracovalo 145 speciálně upravených dynam s induktory, produkující frekvence ve slyšitelné oblasti...
  • Brazil Geography Brazilian Culture  Mixture of African, Portuguese,

    Brazil Geography Brazilian Culture Mixture of African, Portuguese,

    Brazil Geography Brazilian Culture Mixture of African, Portuguese, American Indian, and many other tradition Music & Dance: Samba, Bossa Nova, Capoeira Soccer (known as futebol): Brazil won the World Cup in 2004 Carnival Largest country in Latin America Only Portuguese-speaking...
  • 智慧型住宅(大樓)設計規劃書 - gongkong

    智慧型住宅(大樓)設計規劃書 - gongkong

    饭店型住宅(大楼)智能节能监控系统设计规划书 现代人越来越重视居家生活,诉求回家就像住在五星级饭店一样的饭店式管理概念,逐渐广为购屋族接受,也成为近年豪宅小区 的基本配备。
  • Draw a multicolor flower Project designed and created

    Draw a multicolor flower Project designed and created

    If you observe the flower closely, you find that it is made of individual arms (we call it petals) and each petal is identical except for the colour. You can also see a pattern in which the petals are arranged...
  • Confucianism - IPCISD

    Confucianism - IPCISD

    Confucianism Confucianism originated in China, but its influence spread to Korea & Japan over the centuries. Confucius Confucius was born in 551 b.c. Wanted to become an advisor to a local ruler Unable to find a permanent government position he...
  • Project Management CMI EPTI style. - PMI Erie

    Project Management CMI EPTI style. - PMI Erie

    "My job is very much centered around PM fundamentals. I was taught PMI tools and principles before I even knew what PMI was. The class has been a very natural elaboration of the fundamentals I learned on the job, while...
  • Structure of Super-Heavy Elements

    Structure of Super-Heavy Elements

    Prompt and Delayed Conversion Electron Spectroscopy of Heavy Nuclei Andreas Heinz A. W. Wright Nuclear Structure Laboratory Yale University ATLAS Workshop, August 8-9, 2009