MAPS PROJECTIONS AND SCALE ALL MAPS LIE FLAT

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MAPS PROJECTIONS AND SCALE

MAPS PROJECTIONS AND SCALE

ALL MAPS LIE FLAT AND ALL FLAT MAPS LIE!

ALL MAPS LIE FLAT AND ALL FLAT MAPS LIE!

Map projections • There are many types of projections. Here a few: – Robinson

Map projections • There are many types of projections. Here a few: – Robinson – Goode’s – Eckert IV Equal Area – Mercator – Mollweide Equal Area – Peters

Issues • Each type of map projection has problems —and the biggest problem is

Issues • Each type of map projection has problems —and the biggest problem is trying to fit a round globe onto a flat surface!

• Based on tables of coordinates, not mathematical formulas. The projection distorts shape,

• Based on tables of coordinates, not mathematical formulas. The projection distorts shape, area, scale, and distance in an attempt to balance the errors of projection properties.

• Tears, or interruptions, minimize specific distortions. They are placed to group related

• Tears, or interruptions, minimize specific distortions. They are placed to group related parts of the map together. The Goode homolosine projection uses four distinct interruptions that cut through the oceans but leave major land masses untouched.

• The central meridian and all parallels are at right angles, all other

• The central meridian and all parallels are at right angles, all other meridians are sinusoidal curves. Shape distortion increases at the poles. Scale is correct at standard parallels of 49: 16 North and South.

• Straight meridians and parallels that intersect at right angles. Scale is true

• Straight meridians and parallels that intersect at right angles. Scale is true at the equator or at two standard parallels equidistant from the equator. Used for marine navigation because all straight lines on the map are lines of constant azimuth.

• The central meridian is straight. The 90 th meridians are circular arcs.

• The central meridian is straight. The 90 th meridians are circular arcs. Parallels are straight, but unequally spaced. Scale is true only along the standard parallels of 40: 44 N and 40: 44 S.

• De-emphasizes area exaggerations in high latitudes by shifting the standard parallels to

• De-emphasizes area exaggerations in high latitudes by shifting the standard parallels to 45 degrees.

Scale • Large scale—objects are large (large detail) – E. g. 1: 10, 000

Scale • Large scale—objects are large (large detail) – E. g. 1: 10, 000 • Small scale—shows more of the Earth but the detail is less. – E. g. 1: 1, 000

Images showing scale— Seattle, Washington

Images showing scale— Seattle, Washington

Satellite view of the United States

Satellite view of the United States

The West

The West

Colorado

Colorado

County Level

County Level

Winston-Salem

Winston-Salem

Parker

Parker

Parker as Part of US

Parker as Part of US

You know what this is!

You know what this is!

Ponderosa High School

Ponderosa High School

Map of the United States

Map of the United States

The United States

The United States

Map of North Carolina

Map of North Carolina

Forsyth county within NC

Forsyth county within NC

The Southeast

The Southeast

North Carolina

North Carolina

County Level

County Level

Forsyth County

Forsyth County

Winston-Salem as part of the US

Winston-Salem as part of the US

You know what this is!

You know what this is!

Scale Scale Factor Scale Drawings Scale Scale FactorScale Scale Factor Scale Drawings Scale Scale Factor
Map Projections All flat maps have some distortionMap Projections All flat maps have some distortion
PROJECTIONS OF LINES PLANES AND AUXILIARY PROJECTIONS PROJECTIONSPROJECTIONS OF LINES PLANES AND AUXILIARY PROJECTIONS PROJECTIONS
Orthographic Projections Orthographic Projections n Orthographic Projections areOrthographic Projections Orthographic Projections n Orthographic Projections are
Map Scale Large Scale and Small Scale MapsMap Scale Large Scale and Small Scale Maps
SCALE LIMITED SCALE RC SCALE 10 SCALE 20SCALE LIMITED SCALE RC SCALE 10 SCALE 20
Map projections and datums Maps are flat EarthMap projections and datums Maps are flat Earth
Section 2 Types of Maps are flat projectionsSection 2 Types of Maps are flat projections
Section 2 Types of Maps are flat projectionsSection 2 Types of Maps are flat projections
Types of Maps Mercator Projections Conic Projections GnomonicTypes of Maps Mercator Projections Conic Projections Gnomonic
Types of Maps Mercator Projections Conic Projections GnomonicTypes of Maps Mercator Projections Conic Projections Gnomonic
Scale Factor Scale Drawings Understanding Scales All scaleScale Factor Scale Drawings Understanding Scales All scale
Scale Factor Scale Drawings Understanding Scales All scaleScale Factor Scale Drawings Understanding Scales All scale
Writing Lab Lie and Lay Lay vs LieWriting Lab Lie and Lay Lay vs Lie
Lie Presentation Position Attitude and Denominator Lie TheLie Presentation Position Attitude and Denominator Lie The
Abnormal Lie and Presentation Definitions Lie the relationshipAbnormal Lie and Presentation Definitions Lie the relationship
3 Lie Derivatives And Lie Groups 3 13 Lie Derivatives And Lie Groups 3 1
Writing Lab Lie and Lay Lay vs LieWriting Lab Lie and Lay Lay vs Lie
What Is a Lie A lie is somethingWhat Is a Lie A lie is something
SIMILAR WORDS lie or lay to lie subjectSIMILAR WORDS lie or lay to lie subject
Lie Detection History of Lie Detection Current MethodsLie Detection History of Lie Detection Current Methods
Manifolds Lie Groups Lie Algebras with Applications KurtManifolds Lie Groups Lie Algebras with Applications Kurt
1 is ar lie n be Ik lie1 is ar lie n be Ik lie
Do you Lie A lie is a typeDo you Lie A lie is a type