Assignment #3: Map Projections

 

1)      Mapping the world: First, I created a folder and extracted the world continent data with world 3D background. Then I go to view > data frame properties and finally select the coordinate systems. The world map has been projected using the World Goodes Homolosine Land Projection.

 

 

 

2)      Mapping the United States:

 

This exercise consists of mapping the USA and compare various information of different cities like distances and coordinates.

 

 

 

The answer to the questions are given below:

 

 

 

a)      Determine the approximate latitude and longitude of three cities

City

Latitude

Longitude

Phoenix

33.413149

-111.819485

Denver

39.730618

-104.823870

Oklahoma city

35.304821

-97.685486

 

b)      What is the distance between Augusta and Olympia in miles if the view is not projected?

 

           Ans: 2530.3798 miles.

 

c)      What is the distance between Augusta and Olympia in miles if the view is projected into Albers Equal Area?

Ans: 2547.81 miles.

d)     In the Cities attribute table, why do think there are several values with –99 when looking into the elevation values?

 

Ans: I believe, the reason is because of the change in the map projection system.

 

e)      What are the same distances in kilometers?

 

Ans: If the views are not projected, then the distance is 4072.26 Km. If the view is projected into Albers Equal Area, then the distance is 4100.31 Km.

 

f)        Which capital city is the most populous?

 

Ans: Phoenix, Arizona with population of 983403.

 

g)       Which capital city is the least populous?

 

Ans: Montpelier, Vermont with population of 8247.

 

h)      Which capital city has the highest elevation?

 

Ans: Santa Fe, New Mexico with elevation of 6989 ft.

 

3)      Mapping New Mexico:

 

In order to accomplish this task, I selected select feature tool and the clicked on the top of the New Mexico state in the US cities map. After that, right click on US states > export data. Finally I used the ArcToolbox to project New Mexico with a 106 central meridian.

 

4)      Add maps to the website:  All of the maps were finally placed in the website and made it presentable.

 

This homework took too much time to figure out everything and to finish.