Lab 7

The first map shows the African American population ranked by percentage in different counties in US. We can see from the graph, The darker blue represent higher percentage of black population. The lighter blue, the lower percentage of population. From this map, we can see most African American population lives in the south east of US, such as Florida, Georgia, Alabama, Mississippi, Louisiana and South Carolina. Some of counties contains 53% to 86% population of African American. While in other states,especially around west and central American, African American population is very low. Some of places is even below 4%.

The second map show the Asian American population ranked by percentage in different counties in US. The darker pink represent higher percentage of Asian population. The lighter pink represent lower percentage of Asian population. Overall, compared to African American, Asian population is much smaller in US. The most abundant area is in South California, Bay area, New York area and a small area in Washington state. In other areas, especially in south and central area, Asian population is relatively small.

The third map show the other races population ranked by percentage in different counties in US. We can see from the graph, the darker red represent higher percentage of other races. The lighter red, the lower percentage of population of other races. Overall, ,most other races population lives in the south west of US. As we expect, there are many Latin American population in the south west states such as South California, Arizona, New Mexico and Texas. Besides, we can see there are also large population in south Florida and north west of US. In other areas especially central and East, the population of other races are small.

In this lab, we create three maps for  population percentage for different races in US. We use ArcMap and ArcCatalog to join the excel data sheet and the normal map. After joining, we can easily see the excel data from the map. From this map, I think GIS is really useful and convenient for people's life. Before using GIS, I think it is really hard and boring for me to read through the data from excel. However, by using GIS, we can illustrate the boring figures into vivid maps. From these maps, we can easily get the ideas of these data. Overall, GIS bring us a convenient and vivid life.