Belle Rehder

Assignment 3

 

A view of the world.

 

Projection Type:

Geographic Coordinate System:                GCS_North_American_1983

Datum:     D_North_American_1983

Prime Meridian:       Greenwich

This view is called “world from space”

               N

A view of the contiguous United States.

North_America_Albers_Equal

Area_Conic

Projection: Albers

False_Easting: 0.000000

False_Northing: 0.000000

Central_Meridian: -96.000000

Standard_Parallel_1: 20.000000

Standard_Parallel_2: 60.000000

Latitude_Of_Origin: 40.000000

Linear Unit: Meter

GCS_North_American_1983

 

This is a copy with selected features of a map from ESRI. This data comes from mistakenly using templates and NOT template data.
 
 

 

 

This is a projected view that was created using the above projections. I made this by opening the main  data frame and selecting USA cont. albers e.a. conic

Determine the approximate latitude and longitude of three cities.                                                              

Augusta, ME

Phoenix, AZ

Santa Fe, NM

69 46’4.267’’W  

112 4’53.497’’W 

105 56’56.429’’

44 22’31.0’’ N

33 34’2.53’’N

35 40’50.791’’N

What is the distance between Augusta and Olympia in miles if the view is not projected?                   Length: 2,394.335446 Miles

 What are the same distances in kilometers?  Length: 3,853.317091 Kilometers

 What is the distance between Augusta and Olympia in miles if the view is  projected into Albers Equal Area?   Length: 2,547.760236 Miles, Length: 4,110.553263 Kilometers

Which capital city is the most populous? Phoenix, AZ (pop1990)

 Which capital city is the least populous? Montpelier, VT (pop1990)

 Which capital city has the highest elevation?   Santa Fe, NM (6989’)

Create a view of New Mexico using the query builder.  Create a layout with the state, listing the projection parameters.

I struggled with this assignment, but with the help of a more reading and a tutor (Thank you Kelly!!) I learned some important points about GIS projections. There are three ways to get selections for projections. To make a selection you can:                                   

1. Build a Query, then open a)-Attribute Table, b)-Options Tab c)-Select by Attributes d0-Used “Get Unique Values”  2.  Graphically – use select tool in toolbar and then select features in the map 3. Select straight from attribute table.

I also learned the importance of “template data” vs “template”. Projections chosen will give you a view that is specific to a geographical area and “outside this view” the data may be visually skewed (to me it looks somewhat warped) This is because the data that is “spheroid” in the normal space is laid flat and represented  2-dimensionally.