Monday, October 12, 2009
Cool animals I have seen overt he past few years...
Anyway, enjoy my neogeography...(you might have to zoom out to place the map in frame, I couldn't fix that. Also, It's best to click "view in a larger map" since the photos I used are quite large.)
View James' sweet map in a larger map
Neogeography is a relatively new form of GIS that allows individuals to create open source GIS and spatial data through a common programming interface. Often, this is done through the internet, allowing instant sharing and modification. This ability has allowed GIS to grow exponentially in the past few years, as anyone can create a GIS map. Neogeography is thus, user-centric, as the creator and users are the main focus of the maps, highlighted by the interactive formatting. This interactive format engages casual users and allows maps to be created about almost anything. These maps are highly accessible and create new expectations for dynamic, user-friendly, powerful maps.
unfortunately, this technology has many negative consequences. The largest of which is the quality of these aforementioned maps. user generated maps are not held to any standard and data can easily be inaccurate or completely falsified. The ease of neogeography on sites like googlemaps also creates an excess of maps that may not be that informative or may contain information that people do not care about. This flood of irrelevant data makes people more wary about the validity of other maps (a result of becoming overloaded and jaded with poor content). This map abuse is unregulated due tot he power of the internet. In this way, traditional GIS is useful, as it is professionally made, standardized, and map centric.
In my experience, googlemaps has created a very user-friendly experience that let me publish a map of cool animals I've seen all over the world. It was actually something I didn't know I could do, but was glad that this class forced me to do it. It is something I would love to share with my family and friends. However, the map does not really have any value past showing off to my friends about cool stuff I've done. In this sense I feel many of these user-generated maps are probably made to stroke the egos of the creator. The "look at me!" factor on these maps is probably through the roof. That being said, for every 100 of these worthless maps (mine included) there is a unique and throught provoking map that everyone can enjoy and learn from. In this sense, it is worthwhile to keep this internet infrastructure, as I am willing to put up with all the boring, worthless maps if it means cool maps like Twittervision can exist.
Monday, October 5, 2009
USGS quadrants: an adventure in topography
1. What is the name of the quadrangle?
Beverly Hills Quadrangle
2. What are the names of the adjacent quadrangles?
In a clockwise fashion: Canoga Park, Van Nuys, Burbank, Hollywood, Inglewood, Venice, and Topanga Quadrangles
3. When was the quadrangle first created?
Topography compiled in 1966
4. What datum was used to create your map?
North American Datum (1927 and 1983)
National Gedetic Vertical Datum of 1929
5. What is the scale of the map?
1:24,000
6. At the above scale, answer the following:
a) 5 centimeters on the map is equivalent to how many meters on the ground?
5 cm on the map = 1,200 meters on the ground = 1.2 km
b) 5 inches on the map is equivalent to how many miles on the ground?
5 inches = 1.89 miles
c) one mile on the ground is equivalent to how many inches on the map?
1 mile = 2.64 inches
d) three kilometers on the ground is equivalent to how many centimeters on the map?
3 km = 3000 m = 300000cm/24000 = 12.5 cm on the map
7. What is the contour interval on your map?
20 feet
8. What are the approximate geographic coordinates in both degrees/minutes/seconds and decimal degrees of:
a) the Public Affairs Building;
34°4’27”, -118°26’21”
b) the tip of Santa Monica pier;
34° 00’ 30”, -118° 30’ 00”
c) the Upper Franklin Canyon Reservoir;
34° 6’ 12”, -118° 24’ 49”
9. What is the approximate elevation in both feet and meters of:
a) Greystone Mansion (in Greystone Park);
560-570 m
b) Woodlawn Cemetery;
140 m
c) Crestwood Hills Park;
630-640 m
10. What is the UTM zone of the map?
Zone 11
11. What are the UTM coordinates for the lower left corner of your map?
Approximately 361472.27, 3763170.11
12. How many square meters are contained within each cell (square) of the UTM gridlines?
1,000,000 sq meters (1000m x 1000m)
13. Obtain elevation measurements, from west to east along the UTM northing 3771000, 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 values 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° east
15. In which direction does water flow in the intermittent stream between the 405 freeway and Stone Canyon Reservoir?
Water is flowing south.
16. Crop out (i.e., cut and paste) UCLA from the map and include it as a graphic on your blog.