THE ROUND EARTH ON FLAT PAPER

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03362A000700020005-5
• Release Decision: RIFPUB
• Original Classification: K
• Document Page Count: 2
• Document Creation Date: November 9, 2016
• Document Release Date: December 7, 1998
• Sequence Number: 5
• Content Type: OUTLINE

Approved For Release 1999/08/25: CIA-RDP78-03362A000700020005-5
THE .CUNI) H ON FLAT PAPER
A scale
to The importance of scale
a. Controls amount of detail shown on maps
bo Determines the size of the sheet
cu Influences the choice of projection to use
2,, Representative Fraction
RoFo
3e Examples of large, medium' and Mall scales
Introduction to ME
Them- are many different projections
2, The problem of flattening out the globe's surface
Characteristics of maps
a Orthomorphic . conforms to true shape
be Equal-area areas have correct size
co Azimuthal m all radial distances are true
Three methods of draw1mg map8
a, Orthographic a as viewed from an infinite distance
be stereographic - as viewed from the opposite surface of the globe
CO Gnomonic - as viewed from the center of the globe
Approved For Release 1999/08/25: CIA-RDP78-03362A000700020005-5
 Approved For Release 1999J08125 : CIA-RDP78-03362A000700020005-5
The-Round Earth On Flat Paper (continued)
Examples of map projections
ae Mercator all compass directions are turf
(1) Transverse Mercator - follows great circle route
bo Polyconic - accurate for large scale map.
(1) Transverse polyconic earth's axis turned 900
c o Lambert conformal conic - good for mid-latitudes
Approved For Release 1999/08/25: CIA-RDP78-03362A000700020005-5