# 4 Steps to Mapmaking and Descartes Cartesian Coordinate System - PowerPoint PPT Presentation

1 / 20
Title:

## 4 Steps to Mapmaking and Descartes Cartesian Coordinate System

Description:

### ... to Mapmaking. and Descartes' Cartesian Coordinate System ... Rene Descartes ... Descartes discovered that he could accurately describe an object's position at ... – PowerPoint PPT presentation

Number of Views:49
Avg rating:3.0/5.0
Slides: 21
Provided by: scotg2
Category:
Tags:
Transcript and Presenter's Notes

Title: 4 Steps to Mapmaking and Descartes Cartesian Coordinate System

1
4 Steps to Mapmakingand Descartes Cartesian
Coordinate System
2
What Is a Map?
• Maps are one of the most important types of
documents associated with exploration.
• A map is a graphic representation that explains
space and proportion.

3
4 Steps to MapmakingStep 1Where Are We?
• The first step an explorer takes in preparing a
map is to determine his or her location.

4
4 Steps to MapmakingStep 1Where Are We?
• The location of any place can be understood with
reference to its distance and direction from
another point or place.

45 Miles south-east
5
4 Steps to MapmakingStep 2Determining
Projection and Scale
• Putting the imaginary grid system of the Earth on
a flat piece of paper cannot be done without
distorting the map's shape, area, distance or
direction and changing its scale.
• To compensate for these distortions, mapmakers
construct map projections to emphasize or
de-emphasize one or more of the basic map
properties cited.

6
Examples of Map Projections
7
4 Steps to MapmakingStep 2Determining
Projection and Scale
• Map scale refers to the proportional relationship
between the distance of two points on a map with
the actual distance on the ground.

8
4 Steps to MapmakingStep 3Adding Symbols
• The next step of an explorer is to add features
of the physical, natural, and cultural landscapes
that will most accurately represent the pattern
and texture of the area mapped.
• Map symbols are small graphic images that stand
for something else.

9
4 Steps to MapmakingStep 4Naming Things
• The final step in creating a map is selecting
names that identify relevant features, landmarks,
and places.

10
(No Transcript)
11
4 Steps to MapmakingStep 4Naming Things
• Geographical names are fundamental elements of
maps and they also provide important reference
frameworks in our daily life.

12
Rene Descartes
• Lived from 1596 to 1650 and was a French
mathematician , philosopher and anatomist.
• He contributed to many modern ideas involving
science and the scientific method
• He is most famous for the Cartesian Coordinate
System that still serves as the foundation for
graphing over 350 years after his death.

13
The Cartesian CoordinateSystem
• Descartes discovered that he could accurately
describe an objects position at any time by just
three numbers.
• The three numbers would describe the object's
position in relation to where it was to the floor
• It is known as the x, y, z coordinate system.

14
Lets simplify this thing
15
X one plane, Y the other plane, Z Elevation
16
Examples of the Cartesian Coordinate System in
Maps
• A contour map is a flat surface that depicts
elevation by the distance between contour lines.
• A contour map uses the z coordinate and shows
elevation.

Z height of an object
17
Examples of the Cartesian Coordinate System in
Maps
• Using the Cartesian Coordinate System today would
show a map in three dimensions.

18
The Cartesian CoordinateSystem
• The two-dimensional coordinate system is
frequently used in math.
• It is also very common in mapmaking and the
planning of cities

19
Examples of the Cartesian Coordinate System in
Maps
20
Cartesian System in use
• In this class we will use a simplified system of
moving on a flat earth, to get general
distances.

website