There’s a port in the southwest Washington, has approximately 25 ships in port and 41 port calls. Which is a fair amount of marine traffic. By the time I looked at it, it’s mainly sailing vessels. and two passenger vessels. To be honest, I am a little bit surprised that Washington has this kind of port since I assume it’s an inner land city different from Shanghai and Suzhou. Different from lots of ferries transportation in New York, I barely heard that people are taking a ferry in Washington.
This is Berlin, it has a fair amount of vessels as well. But is basically along the continental river. I spotted a port on the south side of the river. I also notice a pattern that vessels are almost along the major cities.
This is Shanghai~ Shanghai is such a busy port and Changjiang(Yangzi River) is a major canal for China. The majority of vessels are cargo, bulk carries and oil/chemical tanker. And vessels are distributed along the border of Shanghai as well.
For the GeoJSON data collecting, I mainly collected two data. The first one os the shopping that I frequently go to, I include the nearest Macys, CVS near our academic building. For the second one, I marked all the CVS pharmacy I have visited.
I was motivated to do the second one because one day when I went to the CVS, which was supposed to be a 24 hr convenience store, it was closed. So I paid attention to the opening time and documented. Also, there are special centers within CVS, so I also documented the CVS special center.
Reading Mark’s chapter1-3 reminds me of high school when I am studying geography. I learned a lot about how to read different maps, getting information from them and also how to distinguish them. Mark mentioned different kinds of maps in his article, some of them are a Humanistic map which shows human phenomena in the map, for example, how long or how much does it take for you to get to certain place etc. Compare to geographical maps or maps showing natural phenomena, this kind of map needs to be updated regularly. For example, in chapter3, I love that how he used Washington Metro map as an example. Now the map is updated and the scale is already larger. There are also some new lines and stations added to the map. Also, it is mentioned in the reading that this kind of map made it easier for users because it’s efficient in addressing questions. “Where am I, where is my destination, do I need to change trains etc.
Beijing has a similar metro system and Baidu published an electronic version of the metro map. It’s very convenient because compared to hard copy, update electronic version is a lot easier. Also, riders can highlight which line they want to take. Also, if riders put their destination and starting point, the system will generate the best line for them including “transfer”, “total riding time” etc. They can also take a look at First and last bus time at each station for each line. Baidu map also has a mobile app version that enables users to use data to query anytime and anywhere that they want. Mark also mentioned, “ functions dictates form, a map more “accurate” in the usual sense would not work at all. “Maps especially humanistic maps, are generated based on the need of human beings. When we looking at the subway map, the map in the usual sense was totally hidden because that might cause a distraction.
So sometimes when we saw a white lie in the map, It’s probably because of human need and the purpose of the map seeing people better.Like selection, smoothing, line conversion mentioned in the reading. Also, nowadays lots of maps are enabling users to alter the scale by themselves so that they can decide how detailed they want based what they are going to use the map for. All in all, map a tool of serving people, even if it lies, it lies for serving people better.
The most interesting article is: why you can’t trust GPS in China. This is what I have really experienced. Either for the “the varying offset [of] 100-600m.” or the copyright infringement, there are lots of inaccuracy on map app in China. Once I tried to get to a grocery store in Shanghai and the GPS led me to the middle of nowhere which is so far away from my destination. Also, the difficulties of getting data to improve the accuracy of the map are mentioned in the article. “It is, in fact, illegal for foreign individuals or organizations to make maps in China without official permission. As stated in the “Surveying and Mapping Law of the People’s Republic of China” “. Tibet Taiwan and South Sea were another huge issues. Once I remembered that there was an article being reported in Wechat moments saying that “We shouldn’t but iPhone7 because, in the Apple Map, the south sea is not Chinese Territory. Also when my roommate and I paid the neseum(a museum called nuseum) a visit this weekend, we found something interesting.
The other two articles talked about selective ability. In Lewis’s article, it mentioned the accuracy of the GPS tracker can be incredible even reduced the using of RA. “would be accurate to only 100 metres or so”. Also, it managed to “calculate the SA error and transmit corrections to a mobile civil receiver in real time.” However, giving up SA means a huge step forward for the mapping system.
Last week, we watched some ted talks of “locative album” “happy map” etc. All of those is based on the accuracy of the mapping system. In short, Chinese mapping system is facing a huge challenge because of China’s unique situation and some developed countries like the United States have already made some huge progress on the accuracy and correcting errors in the mapping system.
This week, I went on Geocaching. It’s about 10 minutes walk from our dorm. I tried my best to find it. The first one is called “flat earth society. It’s on the street across from the instruction site. I got a little worried when I saw the construction site and then I started to look for it. I couldn’t really spot it because the only things I could see are trees and street lights. Then I read the hint and instructions saying that the name is the hint. So I tried to figure out what’s happening through the name of the cache. I tried to go over every flat space in the area. Also looked into the newspaper stand because someone said: “free is always the best”. I even pulled it up and moved it haha. Eventually, I still couldn’t find it.
(I got the same view in the app)
Then I chose another one near my internship place about woman right and tried to find it. I followed the instruction and spotted the place really soon. The container was red and out into the green grass and that was a little bit way too obvious. Then I hanged around the neighbor and found a poster about women rights which is corresponding to the name of the cache. However, the stuff inside was some random normal staff and didn’t correspond to the theme.