The map shows the distribution of an Asian alone population.
In California, there are a lot of Asians, so Ca has the most Asian population(dark blue colors)because it is the state closest to Asian in the west coast of America. Also by immigration, they came to the United States. For example, In Los Angeles, there is a Korean town because many Koreans are there, so they made a town for their life.

The map shows the distribution of black population. We can check their distribution. For example, most of the population lives at south east of US. Counties. The greatest numbers are seen in states such as Alabama, Georgia, and South Carolina. The history of the United States shows the reasons for this trend because slavery was widespread in these southern states.

The map is about other races alone population in the United States. Red colors indicate a higher percentage of other races alone population. It is centered at south west. Also, in Ca, there are a lot of Mexicans because they moved from Mexico to America.

America is a really diverse county. There are a lot of races with their own unique cultures.

Lab 6

Yosemite National Park

Geographic Coordinate system:
GCS_North_American_1983

Coverage of map (units in decimal degrees):

Top = 37.4116666659668º
Bottom = 37.0247222214963º
Right = -118.724166666316º
Left = -119.226111110794º

large mountain area
Right corner is steeper

LAB#5

Map projections : To show the surface of a sphere or another shape on a plane.

They are critical in creating maps but it is important to note that they always distort the surface in some way. This distortion is very apparent by the difference in distance from Washington D.C. to Kabul, Afghanistan in the maps. Map projections are used to preserve many different properties of Earth, but not all of them at the same time.

Equal area: To preserve the area. Preserving area is essential for many important applications of maps: scientific information of geographic distributions such as pollution, deforestation, crop yielding, etc, and so on and education atlases and charts. Equal area maps serve to display true area ratios that are hard to interpret from a table.

Conformal map projections: To preserve angles. They are usually used for large-scale applications and conformal maps are used in solving engineering and physics problems. They have been important in the study of the electromagnetic field, the gravitational field, and much more. They are generally better used for calculations than continental or world maps.

Equidistant map projections: To preserve distance from a standard line and point. The distances are only correct between points along a straight line and otherwise are not accurate. Useful application are a polar projection, where all the distances from the center are measured along any longitudinal line will be accurate, to show airline distances, and for seismic and radio work.

It was a very difficult homework for me, and I had two weeks for the homework.

The concept of GIS has evolved through time. GIS can be perceived as the layer or platform that blends the storage and computational power of computers with the questions of people. The increased availability of such technology has now brought GIS to a new front.

ArcMap by Esri is a kind of GIS oriented applications, and it is used primarily to view, edit, create, and analyze geospatial data. ArcMap allows the user to explore data within a data set, symbolize features accordingly, and create maps.

My experience with ArcMap was initially daunting. I thought that the program had a very complicated system, but from the tutorial system I would be interested in the program. I discovered some key patterns that were utilized to accomplish similar tasks from working with ArcMap. Such workflows include the process of creating a legend, title, or scale. In addition the interactions with the layers in the Table of Contents all followed a similar sequence of steps.

I grew more familiar with the tasks the tutorial assigned me by repeating from the tutorial a few times, but I also grew more cognizant of the downsides of GIS. A glaring pitfall of GIS seemed to be the number of ways similar tasks could be accomplished. Whether it be the rearrangement of table data or the insertion of a population layer, it seemed to me there were numerous paths that led to the same result.

Also, I realized many potential questions that GIS could leave unanswered. This includes the lack of interpretation in GIS. The purpose or readability of the map is dependent on the map’s creator and the software has no say or opinion on what the map it produced is. The freedom that GIS also offers to its users may produce misleading or inaccurate maps. But despite such pitfalls GIS remains an incredibly