Mapping the Station Fire

The climatic conditions of California vary widely depending on latitude, elevation, and nearness to the coast. Climatic conditions contribute greatly to the wildfires that Californians experience in areas that are within a Mediterranean climate. Mediterranean climates consists of fairly wet winters and dry summers. California’s summers are mainly hot and dry in southern regions of the golden state. Summers are particularly relevant to the commonality of wildfires within the southern portion of the state. Thus, these conditions make Southern California prone to wildfires such as those Los Angeles County experiences (Climate).

As stated before, Southern California is prone to wildfires. Since fires are fitting to this area, Los Angeles County determined portions as fire hazard severity zones. The indicated zones consists mostly of hilly and mountainous terrain. Featured below is a map (titled Fire Hazard Severity Zones) displaying the risky areas within Los Angeles County. Most of the fires within this division are driven by winds and problematic vegetation (Very). Along with warm conditions, the main concern of wildfires is combustible chaparral and brush fuel. Nonetheless, the 2009 Station Fire was not central to the severity zones. The 2009 Station Fire occurred outside of specific haphazardous zones, but as it spread reached the edge of these critical zones. Moreover, the fire was governed by arson, yet vegetation within the specified area played a huge role in the advancement of the fire.

Although native vegetation in Southern California depends on periodic fire for germination, non-native species to California create an unnatural buildup of plant debris. The buildup up from these non-native species alters the frequency and intensity of fires. With respects to Southern California specifically Los Angeles County, wildfire season begins with the arrival of the Santa Ana Winds during October. However, during August the combination of high temperatures, low humidity, and ample tinder-dry fuel caused the 2009 Station Fire. The point of origin was the Angeles National Forest which contained a buildup of plant debris that was up to forty years old. The abundance of tinder-dry fuel as well as the extreme terrain in undeveloped areas allowed for the fire to uncontrollably sweep across the forest floors (Zouhar).

As mentioned before, an abundance of tinder-dry fuel and the extreme terrain in underdeveloped areas supported the rapid growth of the 2009 Station Fire. The region in which the fires spread through is covered by Chaparral which is a term that applies to brushland found in Southern California. Due to the fact that Chaparral flora is adapted to fire, it is the most flammable type of vegetation. Some of this flora contains flammable oils and resins in their leaves which promotes fire (Chaparral). Thus, this area was prone to combustion which is shown on the map titled Surface Fuels of Los Angeles County below. Although live vegetation is significant in fires, the Station Fire Initial Attack Review Report stated that the dead vegetation in that area was extremely volatile and “led to extreme fire behavior.” Moreover, the report indicated that the “percentage of dead vegetation in the area of initial attack ranged from fifty percent to seventy percent” (Kerr, 8). With vegetation conditions such as they were, this area was prone to the extreme fire behavior that occurred on those fateful days.

Another cause of the rapid fire growth was the territory in which it began. The origin of the fire encouraged the roar of the flames because of the excessively steep terrain and limited visibility. The elevation of this area was of great concern and is visible on the last map featured. As noted in the Station Fire Initial Attack Review Report, the steepness of the space caused this blaze to be extremely hostile. The terrain was “rugged and steep” and ground control was less effective in these specific steep regions. On the other hand, regions with an upslope continued to respond to ground control efforts. Although, two lives were lost during the 2009 Station Fire, many homes and lives were saved from the extensive knowledge of the terrain (Kerr, 9-10). Continued data of fire hazardous zones can assist in the maintenance of wildfires on a larger scale than battling the blazes face to face.

This report is based on the 2009 Station Fire. All GIS data has been gathered from the California Department of Forestry and Fire Protection.

Works Cited

“Chaparral: California and Southwestern U.S..” Chaparral Ecology Web. mcdaniel.edu, 2010. Web 10 December 2012.

“Climate of California.” Western Regional Climate Center. Western Regional Climate Center, 2012. Web. 10 December 2012.

Kerr, David; Thomas, John; Conklin, David; Noiron, Jody. “Fire and Aviation Management: Station Fire Initial Attack Review.” United States Department of Agriculture: Forest Service. USDA, 2009. Web. 10 December 2012.

Siegel, Daniel. “Fire risk remains high in Angeles National Forest.” lacanadaonline.com. La Canada Valley Sun, 5 September 2012. Web. 10 December 2012.

“Very High Fire Hazard Severity Zone.” lafd.org. Los Angeles Fire Department, 2007. Web. 10 December 2012.

Zouhar, Kristin; Smith, Jane Kapler; Sutherland, Steve; Brooks, Matthew L. “Wildland fire in ecosystems: fire and nonnative invasive plants.” Gen. Tech. Rep. RMRS-GTR-42-vol. 6. Ogden, UT: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, 2008. Web. 10 December 2012.

DEM in ArcGIS

The above maps depict the hillshade, slope, aspect, and 3D image of a specific geographic location. The geographic region was previously chosen for this lab assignment, thus I did not choose my area. The extent of this area is as follows: the upper boundary is 39.83 decimal degrees north latitude, the lower boundary is 39.38 decimal degrees north latitude, the left boundary is -105.79 decimal degrees west latitude, and the right boundary is -104.97 decimal degrees west latitude. Moreover, the geographic coordinate system is North American 1983 datum. This area is located in Colorado. The area spans from Arapaho National Forest in Winter Park, Colorado which is the uppermost, left boundary to Sedalia, Colorado which is the lowermost, right boundary. 

Chilean Temperate Forest

CHILE:

The area in which this report is in regards to is Chile, a country located in South America. Chile is a long and narrow strip of land that stretches for 2,088 miles with a width of 265 miles. This stringy country is the longest north-south country in the world. Thus, Chile consists great mineral wealth and a wide range of biodiversity due to the various ecosystems. Particularly interesting, is the richness of forest found in Southern Chile which features chains of volcanoes, twisting peninsulas, and islands. Moreover, Chile is situated within the Ring of Fire causing earthquakes and volcanic eruptions. Below are two maps of Chile, one representing the various geographical landmarks and the other representing the vegetation..


 


HISTORICAL CONTEXT: 

The Chilean Temperate Forest spans in the Southern Hemisphere from 35°S and 55°S. Due to the geographical location and the fact that it receives high rainfall and low temperatures during winter, the ecosystem is classified as a temperate forest. This ecosystem developed after the recession of the continental glacier that occurred more than 10,000 years ago. Due to the recession, the temperate forest remained geographically isolated from tropical forest formations. Thus, this temperate forest is “important in terms of size and lifespan of the tree species, the level of productivity, the enormous concentration of biomass and corresponding capacity of carbon storage, and a high degree of endemism” (Neira, 18). According to the Global Forest Watch, for the last 3,000 years the Chilean temperate forest remained intact with little to no alterations. It is estimated that the forest covered 18.4 million hectares, allowing for a richness in flora and fauna. Although the indigenous of the temperate forest converted land to “agriculture and pasture land,” they were forced to abandon the area following the Spanish conquest and the forest was able to recover (Neira, 16). Succeeding the Spanish, European settlers arrived and impacted the forests by converting the forest into land for agriculture and pasture land. Furthermore, intentional fires were set that destroyed a vast amount of the forest floors. Despite the fact that the Chilean temperate forest is the second largest in the world, currently only “56 percent of the original forest remains” (Neira, 16). Nonetheless, the temperate forest maintains great evolutionary and ecological value. Displayed below is a geographical map of the intact ancient forest shown in dark green and other forests shown in lite green.

HUMAN IMPACTS:

Chile along with the Pacific coasts of Canada and the United States make up three quarters of the world’s temperate rainforests. These rare forests, covering about 0.2 percent of the Earth’s land area, exceed all other terrestrial ecosystems. Due to the largest concentration of biomass, producing between 500 to 2000 tons of organic matter per hectare, Chile has the highest rate of biodiversity of the world’s temperate forests along with many diverse ecosystems, varied landscape and climate (Langman).  The forests are habitats for many species including wildcats, fox and deer. However, about forty different mammals are endangered, by Chile’s forest and park service. Ninety-five percent of the United States temperate rainforest has been destroyed, while forty percent remain in southern Chile. Three percent of the world’s remaining frontier forests are in the temperate zone, and one-third of the threatened temperate regions are found in Chile (McDermott).

The biggest sources of native forest destruction are overexploitation for wood chips and clear cutting for tree plantations. According to the Central Bank report between 40 to 90 thousand hectares of native forests destroyed each year are converted to exotic species tree plantations. Selective logging disturbances are most prevalent causing severe degradation by altering the forests structure and composition. At this rate native forests would be eliminated in about 40 years if logging continues to increase. The impact of these tree plantations includes the loss of biodiversity and wildlife habitat for many endangered species, as well as soil erosion and water pollution. Another factor that has negatively affected the forest ecosystem is fire. An average of 13,660 hectares of native forests have been destroyed each year by fires, in the last 2 decades. Records indicate that less than one percent of fires were of natural origin; 28 percent were set intentionally, 29 percent were related to transportation accidents, and the remainder resulted from undetermined causes (CONAF, 1998).
         
In addition, more than 35,000 indigenous families are threatened with displacement by growth of tree plantations while thousands have been forced to migrate to cities where they lack employment opportunities and a sense of local culture. Even though timber companies have more than 3 million hectares of deforested land available in southern Chile for planting, Chile’s native forests are an “attractive investment” due to cheap bought land, they can be clear-cut first for wood chips, and they provide fertile soil for conserving tree plantations.

FUTURE PROSPECTS:

In 1931, the Forest Law came into force which focused on conserving and protecting the forest, however, today it is only partially implemented (Neira, 26). Inspite of various legislations, there are many efforts to conserve and maintain native species of the Chilean temperate forest. Yet, the state of conservation is of growing concern because of the level of threatened species, such as the southern belloto and the quele. While 29 per cent of the temperate forest is protected by the National System of Protected Wildlands (SNASPE), there are critical areas at risk of being destroyed or ceasing to exist (Neira, 19). Despite efforts made by the government and organizations to protect the floristic-rich regions of the temperate forest, the areas protected are small and incapable of maintaining populations of endangered species. Moreover, most of the forest land is owned by the private sector. Privately owned forest land is becoming increasingly expensive, making it more difficult for the government to purchase for protection. Thus, the private sector must be encouraged to conserve and maintain the temperate forest.   

    
Temporal changes in (a) aggregation index and (b) adjacency index applied to the major land cover types in Rio Maule-Cobquecura. Land cover types: • = agricultural land, □ = arboreus shrubland,  = exotic-species plantation, ▴ = native forest, and ■ = shrubland.

IMPROVEMENT: 

The conservation of Chilean forests is a topic of growing concern among local, national and international conversations organizations. While 29% of the native forests are protected in the National System of Protected Wild lands (SNASPE), the states protected areas system (CONAF et al., 1995), forest types are poorly represented in most regions. SNASPE fails to include critical areas of native forest that are at risk of disappearing or being depleted. Therefore, only a fraction of national species and ecosystems that need protection are represented in the SNASPE. Chile has a total of 85 ecosystems and vegetative sub regions, of which 19 are not represented in the SNASPE (Armesto et al., 1995). Despite government efforts, particular zones of the country are poorly represented in the SNASPE. This protection does not ensure a sustainable continuation of the ecosystem. Because the majority of the forests are in private hands, the sustainable alternative is a locally controlled industry that will transform the forest into valuable products; instead of wood-chips .If the economic benefits stay in the community it will benefit future generations. What we can do is send letters to “Project WILD” and educate the public about the current issue that is at stake.

Census 2000/2010

The above map is a description of the Number of People in the United States of America. As you can see Alaska and Hawaii are present at the bottom left-hand corner of the map. We can see that there is a density of population on the West and East coast of the continental forty-eight states and Hawaii which is depicted by dark brown. Whereas population is less dense in the middle of the U.S. and Alaska. We are able to use this map to study demographics of the United States and provides valuable information for construction new infrastructure within the U.S.. Overall, using GIS to create this map is fairly easy. The most important part of creating such a map, is the data. The data most be accurate in order to create a map that contains no error.

As you can see this map displays the Difference of Population from 1990 to 2000. Based on the map, we are able to see that the greatest amount of population change occurred in Southern California, tip of Nevada, and Arizona. There are some over areas within the continental forty-right United States that have the greatest amount of population change as well which is depicted in dark green. On the other hand, presented by the dark pink coloration, these areas have experienced a decrease in population. Thus, individuals in these areas have moved. One could study why these areas of experienced a negative population change. On another note, as we can see this map has the same set-up as the other map. This is extremely easy to do. Once the map was set-up according to my test and preferences, I turned on and off data, changed title name and legend. This allowed for my maps to be alike and maintain consistencies throughout my project. 

As the title indicates, the above map is the Percent Change of the Total United States of America Population from 1990 to 2000. Compared to the other maps, we noticed a pattern. The coast and middle of the contiguous forty-eight states are inverse in relation. The coast increased in population, represented by the dark purple and purple coloration. While the middle portions decreased in population, represented by the orange and light orange coloration. This map is important because a specialize could use this as a basis of the economic effects of decreased populations in these regions. Moreover, one could study the environmental effects of increased populations within regions. Overall, this map was similar to the previous others and is represented well. However, if one does not know what represented here, one could change the title and this map could represent anything a person wanted. I see this as a downfall of GIS. The data can be interpreted to what the created wants it to depict. 

The Population Density Map is the last of the census series maps. It appears as though density throughout the U.S. is fairly even. Yet, this map is useful to locate regions that are overpopulated. Pertaining to this map, dark blue coloration represents these overpopulated regions. For example, Los Angeles is an overpopulated area. These areas tend to be small and highly urbanized, which is evident with Los Angeles. On the other hand, this map is useful to located regions with 0.00 to .90 population density, less dense. This is relevant for various reasons. For example, the U.S. government is trying to locate a region to dispose of nuclear waste within the contiguous forty-eight. The government could use this map to locate areas of less dense areas then choose an area based on lack of resources in the area and accessibility. Overall, I see the usefulness for GIS. As long as the correct projection is chosen for the map and the data has little to no error, one could gather very vital information about a location and illustrate that information is a visual format. Moreover, the creator of the map best be able to provide enough information so that others can understand and not misinterpret the data gathered. 

Map Projections

During this week's lab, we explored the different world map projections offered by ArcMap. Map projections are significant in geography because they allow us to view planet Earth on two-dimensional surface. Although map projections are more important and useful than globes, map projections can be misused and distort the globe at large. No flat map can portray both a conformal projection and an equal area projection. Thus, you are left to choose which projection is best for the task at hand.

In this lab we were left to choose two equal area projections, two equidistant, and two conformal; a total of six different projections. Illustrated below are the projections of my choosing. We were also required to measure the distance (in miles) from Washington D.C., U.S.A. to Kabul, Afghanistan. Immediately we can see some of the perils when dealing with map projections; accuracy of distance measurement. Take for example the equal area projections, the Behrmann Equal Area Cylindrical Projection measure the distance of the two locations at 8,763.0899124 miles. While the Bonne Projection measure the distance of the two locations at 6,715.658553 which is short coming of the later. Thus, if we are to compare distances of places, depending of the projection used, we must either measure all locations in the same projection for accuracy or explain that this measurement may not be accurate. However, in business accuracy is priority. Measurement is only one of the perils visible. Scroll down to the Conformal Projections examples. Notice that both projections are conformal meaning that the projection is shape preserving, but the Krovak Projection displays a globe while the Mercator Projection illustrates the globe as a rectangle. Moreover, the Mercator Projection portrays Antarctica as being a massive land mass than the rest of the continents. Unlike a globe there are visible distortions, nonetheless these projections can be suitable for a specific problem.

 The potentials of projections is that they can provide spatial data at a specific point on the Earth. Unlike a globe, we are able to use a projection to enhance a specific point for the spatial properties. For instance, equidistant projections maintains the shortest distance between any two points. This is visible with the two examples illustrated below, Conic and Cylindrical. Although the measurements of the two examples are different, they maintain less difference than the other projections. Thus, this projection could be useful in desktop mapping software for measuring two points. 

All in all map projections are not only useful to ArcGIS, but also to the public. For instance google maps most likely uses a projection for enhancing street views and locations. Also, sailors use map projections to navigate the sea. Though the projections have known distortions, there are different types to choose from that will properly illustrates your information. We must not be pessimistic about map projections and distortions, instead we as geographers in a technological age should be able to decipher between what is important to the map and what can be distorted.

Please enjoy the various map projections chosen.

ArcMap

While executing Lab 4 over the course of two weeks, I was to learn ArcMap using the software ArcGIS 10.1. The lab consisted of five exercises which was explained through the ArcMap tutorial. The basis of the exercises was to create a set of maps for a county that planned to expand its airport. This was executed in order to provide adequate analysis of noise and increase traffic affecting not only schools, but houses in the surrounding area. The tutorial is designed to teach the users to add features to maps, edit geographic data, create a summary graph, and other basic skills. Moreover, the tutorial suggested that each lessons be performed one at a time. Also, each lesson was to take anywhere between 30 and 45 minutes.

With instructions in hand, I began with the most obvious, Exercise 1: Exploring your data. This was the first time I used the program, however, I am an average computer savvy individual. Thus, I found the program to run smoothly. I learned how to display various layers and to display specific layers relevant to the county's stipulations. Since this map is for individuals who are not familiar with the data, I learned to create a legend which is useful in explaining the data presented on the map. Yet, the maps in themselves speak volumes. The end result was a map that displayed the schools affected by the noise generated from the airport expansion. This is extremely important not only for potential noise, but for potential pollution and waste schools will be exposed to. (Achievable through additional layers and data). In a border sense, ArcGis 10.1 allows users to provide firms with various amounts of data that is beneficial for affected areas of a firm's future plan, positive or negative. Moreover, layered maps provide a better analyze of data, then written reports and tables, because individuals can visualize information through a map lens than through words. Thus, the potential for ArcGIS is astronomical because an individual using the program are tailoring maps to a firm's specific needs.

While using ArcGIS 10.1, I found that the program is useful for other purposes, such as locating opportunistic real estate for firms. Answering a question, such as "Where should firm A build?" Being able to answer such a question from the comforts of your desk, not only lowers cost for firms in research, but includes other aspects such as demographics and population. Deciding location for a business is extremely important to firms because of cost. The program is able to layer all the concerns of a firm with respects to location and determine a profitable location. Thus, providing tremendous opportunity for both the firm and the people residing in the surrounding area. Moreover, once a map is created, individuals are able to share analyses.

Although there are various amounts of potential, there are also pitfalls to the programs. During my exercises, I was able to add roads and other geographical objects. Thus, I was able to manipulate spatial data. A user is able to falsify data to reflect "positive" aspects that is desired. Also, data may not be exact and distorted from reality. With respects to location, there is not absolute guarantee that that area will generate opportunity as a firm sees. Another pitfall is that this not an easy program to learn without acquiring some education about the different uses. A regular individual will not be able to use this and the cost of the program is expensive. This program is not designed for individual use, but rather for experts who understand geography both physically and culturally. Nonetheless, featured below is my experience using ArcMap tutorial.

Neogeography

Neogeography, or “new” geography, is the usage of people, not in the map making industry, using tools to develop maps. Recently neogeography has become increasingly popular and easily reached through applications such as Google Maps. Individuals, such as me, are able to create their own maps though they may not be qualified to do so. I decided to create a map of Los Angeles’ top ten cupcakeries, for instance. As individuals build maps which require data, this allows the individuals to gain knowledge about spatial information. These maps are then shared with the public. The public then becomes aware of the organization of places and physical features. For example, the map below conveys to those who view it the places of cupcakeries and physical features surrounding these certain areas, such as the ocean near Santa Monica. Moreover, as individuals share and create maps, they become geographically savvy and are capable of appreciating cultural and physical geography.

 However there are pitfalls to neogeography. The individuals that create these maps are not specialist and, thus, can be creating false maps with irrelevant data. This is parallel to Wikipedia, anyone can post anything on the site. Most people accept Wikipedia as a valuable source and believe what the site holds. Thus, neogeographic creations are similar. The public will believe the source and possible be mislead on false data displayed on a map. Furthermore, the public’s access to Google Maps, allows criminals to have the world at their disposal. For instance, a pedophile can target his victims using something like Google Maps which displays landmarks. This is the worst case scenario, but this still occurs. Also, individuals may fabricate data on maps that is in favor of their operation. For example, recently Verizon posted two maps displaying both Verizon and AT&T 3G converge in the conterminous United States. Verizon’s map was far superior to AT&T’s map. Along these lines, the display of maps may have lead consumers to switch to Verizon for better service.

Though neogeography is unregulated, it allows users to share their own geographic creations with the World Wide Web. Many are able to appreciate the simplicity of sharing your relative data with photos and developing your own map to express your own individuality within your realm. There will always be those who use something to their advantage, but that should not disclaim the uniqueness of neogeography.


View Los Angeles Best Cupcake Spots in a larger map

USGS Togographic Map

1. What is the name of the quadrangle?
Beverly Hills Quadrangle
California-Los Angeles CO.

2. What are the names of the adjacent quadrangles?

Canoga Park, Van Nuys, Burbank, Topanga, Hollywood, Pacific Ocean, Venice, and Inglewood.

3. When was the quadrangle first created?
This quadrangle was first created in 2012.

4. What datum was used to create your map?

The following datums were used to create the map: North American Datum of 1983 (NAD83) and North American Vertical Datum of 1988.

5. What is the scale of the map?
1:24,000

(One inch on the map is equivalent to 24,000 inches on the ground)

6. At the above scale, answer the following:
a) 5 centimeters on the map is equivalent to how many meters on the ground?
1200.001 meters

b) 5 inches on the map is equivalent to how many miles on the ground?
1.894 miles

c) One mile on the ground is equivalent to how many inches on the map?
2.640 inches

d) Three kilometers on the ground is equivalent to how many centimeters on the map?
12.500 centimeters

7. What is the contour interval on your map?
Contour Interval 20 Feet

8. What are the approximate geographic coordinates in both degrees/minutes/seconds and decimal degrees of:
a) the Public Affairs Building
34°4’29”N, -118°26’21”W

34.074723, -118.439205

b) the tip of Santa Monica pier
34°00’29”N, -118°29’56”W
34.008056, -118.498889

c) the Upper Franklin Canyon Reservoir
34°7’10”N, -118°24’37”W
34.119452, -118.4103574

9. What is the approximate elevation in both feet and meters of:
a) Greystone Mansion (in Greystone Park):
550 feet
167.64 meters

b) Woodlawn Cemetery
140 feet
42.672 meters

c) Crestwood Hills Park
640 feet
195.072 meters

10. What is the UTM zone of the map?
UTM Zone 11

11. What are the UTM coordinates for the lower left corner of your map?
3,763,000 meters North
  361,500 meters East

12. How many square meters are contained within each cell (square) of the UTM gridlines?
1,000,000 square meters  

13. Obtain elevation measurements, from west to east along the UTM northing 3,771,000, where the eastings of the UTM grid intersect the northing. Create an elevation profile using these measurements in Excel (hint: create a line chart). Figure out how to label the elevation to the two measurements on campus. Insert your elevation profile as a graphic in your blog. 




14. What is the magnetic declination of the map?
14 degrees

15. In which direction does water flow in the intermittent stream between the 405 freeway and Stone Canyon Reservoir?
South

16. Crop out UCLA from the map and include it as a graphic on your blog.

Interesting Maps

 

United States Interstate System

The above map is retrieved from iStockphoto and is a representation of a physical feature displaying an important source of information. As the title implies, the map depicts the interstate system of the forty-right conterminous United States. The red lines symbolize the countless interstates in the United States. Each red line is accompanied with a shield which provides the interstate number, though it is difficult to see the numbers. Additionally, visible are green stars that represent the capitals of the forty-eight states. With the exception of a few capitals, the interstates run through the capitals. Thus, the hubs of all states are linked to one another. Moreover, the interstate system connects the East coast and the West coast. Most notable is the cluster of interstates in the Eastern portion of the United States which is vastly different than the disperse interstates visible in the Western portion of the U.S. Interestingly, the system links American populations with one another and with our neighbors, Canada and Mexico. Furthermore, the location of the interstates corresponds to the urban areas of America. This is significant because these areas are usually key economic and/ or political regions of the U.S.
United States of America Map. 2012. Map. iStockphoto LPWeb. 2 Oct 2012. <http://www.istockphoto.com/stock-illustration-2089672-united-states-of-america-map.php>.

United States Population Density 

This map is located on the National Database of GIS Data website and is a thematic map which is a map that focuses on a specific theme related to a specific geographic area. This particular thematic map emphasizes the spatial variation of geographic distribution, such as the population density of 1990. The map depicts American inhabitants per square mile of the conterminous United States. Located at the bottom left-hand corner is a legend that described what each color represents. The map illustrates the regions of America that are most populated. Most notably is the large cluster of heavily populated states located at the Eastern portion of America, specifically the Northeastern and the East North Central Midwest regions of the United States. California is notably because of its heavily populated regions per square mile. Moreover, the Midwest, the West South Central South, and the Mountain West are sparsely populated. The population density of 1990 is interesting because the population can be correlated with resource distribution and with other environmental factors, such as pollution. Moreover, this map can be associated to the interstate system map above. Notice that the densely populated regions of the Northeastern and East North Central Midwest have many interstates. Thus, we can assume that the interstates play a role in populations and regions that Americans choose to live.

Gisiger, Anne. Population Density - 1990. 1994. Map. A National Database of GIS DataWeb. 2 Oct 2012. <http://www.cast.uark.edu/local/catalog/national/images/maps/Population.dir/USpop1990.gif>.

United States Air Quality 

The third map featured in this blog is from Creative Methods which is a website that “provides scientific analyses for fundamental issues of our world” (United States, N.d.). The map presents the United States’ air quality based on twenty-one measures from the Environmental Protection Agency (EPA). Air quality of the conterminous Untied States is graded from A to F. An A grade indicates that these regions of the United States are the best and cleanest while an F grade implies that these regions are the worst and dirtiest in America. The following colors represent a specific air quality grade: dark blue signifies an A grade, light blue represents a B grade, lime green denotes a C grade, yellow corresponds to a D grade, and red symbolizes an F grade. Although the website did not indicate what year this data is from, most notable are the regions containing a D grade of air quality. These regions are located in densely populated areas, such as the Northeast and East North Central Midwest. Moreover, the sparsely populated regions of America have an average air quality grade, denoted by the lime green C grade. Yet, there are regions within the Midwest that received an F grade. If the population density map is layered with the air quality map, we will notice that the Midwest areas which are densely populated are also the dirtiest regions of America with respects to air quality. Furthermore, the state of California appears to be the dirtiest and contain the worst air quality of the nation. California is also densely populated with some regions contain 400 to 70,000 in habitants per square mile (refer to population density map above). The air quality map is significant because it allows researchers to view the most polluted areas of our nation and concentrate on improving air quality.

United States Air Quality. N.d. Map. Creative MethodsWeb. 2 Oct 2012. <http://creativemethods.com/airquality/maps/united_states.htm>.