Understanding Map Projections Map – flat drawing of all or part of earth. Cannot accurately display round earth on a flat surface Distortions -- size, shape, or distance – Equal Area – shows size – Conformal map shows shape
Map ProjectionsType Advantage DisadvantageMercator Shape and Distance Size at Poles Sea Navigation L&L =90Robinson Shape/Good World Map EdgeMollweide Size Shape at EdgesInterrupted Size and Shape Gaps in DistancePolar Distance/ Aerial/Navigation Around Edges
Interpreting Maps Title – Type of Information Legend or Key – Shows meaning of symbols Symbols – Line, color, dot, picture, or star to represent something.
Interpreting Maps Types – Physical – Political – Weather – Road – Population – Economic
Reading a Physical Map Shows features of the land and location Elevation – Height above Sea Level Sea Level – Surface of Ocean Highland – Hills, Mountains, Plateaus Lowlands – Valleys and Plains
Reading a Physical Map Land surface relief –Difference between highest and lowest points –High relief – sizable drops and rises in surface –Low relief – land rise or falls only slightly over a long distance.
Telling Directions Determine which direction first? Why? Once you know which direction is NORTH you can figure out the other directions Cardinal N, E, S, W Intermediate NE, SE, NW, SW.
Telling Directions Direction Arrow – indicates North Compass Rose – Shows all four cardinal and intermediate directions.
Using Scale Scale – line that tells how many miles or kilometers on earth that are represented by certain units on the map. Map Area – map that show a large area in a small space are limited in the details that they can show. Maps that show a small area in a large space can often show many details.
Using A Grid Grid – pattern of regular sections identified by a system of numbering and lettering. Horizontal and vertical lines meet to form blocks. Index – list place and grid locations in alphabetical order.
Latitude and LongitudeGlobal Grid – Two sets of linesParallels of latitude – HorizontalsRun all the way around the globe, never meet, parallel to the equator.Meridians of longitude – VerticalGoes halfway around the globe, meet at two points – North and South Pole.
Latitude and LongitudeUnit of measure – DegreesDegrees of latitude 1 = 69 milesEquator 0 latitudePoles 90 latitude