Create a visualization of hydrological data. The file topo_atlantic2.txt contains various data from hydrology reports of a section of the Atlantic Ocean. The data is also available in MS Excel format as topo_atlantic2.xls. The data was retrieved from NEMO, the Oceanographic Data Server at http://nemo.ucsd.edu/hs.html.
The data includes the latitude and longitude where the sample was taken, the water depth at that position and various measurements from the water at that location (the last 8 columns) including Salinity, Oxygen, Phosphate, Silicate, Nitrite, Nitrate and Ph. You should pick a subset of these for your visualization. Not every sample resulted in a measurement so there is a good deal of missing data noted by a "-".
You should also pick a subset of locations. For instance, you could choose to do a small 1x1 degree area in approximately 5 or 10 minute increments, or you could do the entire range in 1 or 2 degree increments. If you are feeling particularly daring, you could take a look at NEMO and find a location that is interesting to you and see if there is data from it. (See below for information on searching NEMO).
Visualize enough data that you think is interesting without having so much that the visualization is cluttered. Take advantage of the features in Excel to sort, remove, and find data. There is a lot of room here for creativity, but also a lot of work. Make sure you start the assignment early so you have time to ask questions before the due date.
When I ran the search that got the data for the assignment I specified the following information:
| Ocean | Atlantic |
| Latitude Top | 40 |
| Lon_left | -60 |
| Lon_right | -42 |
| Latitude bottom | 20 |
| Output Format | Station Summary |