First Quiz Reflection
August 24, 2011 § Leave a comment
Had the first quiz for arca today.
Didn’t feel great. My notes for studying the quiz were Completely different to the material, with many irrelevant points and missing many others.
The quiz referenced historical examples. Also, queries about readings were much more specific than just their overarching concepts. There was a vast difference between the most general to the most specific questions (ranging from difference in terminology e.g. ‘topology’ vs. ‘topography’, to the degree difference of MGA zones and reasons for specific co-ordinates).
Due to my limited views on this subject, I intend on expanding my notes from the lessons and readings to concisely encompass a broader scope of the material covered.
[ UPDATE: Marks Received. ]
Received the marks for the quiz. Didn’t do too bad at 84, but still could have done better. Generally I should focus more on the readings.
Some specific facts that required reviewing were that:
- Remote Sensing is advantageous for it’s speed, wide perception, and ability to quickly build up a DEM.
- In Bevan and Conolly’s study of Kythera, they found a strong correlation between SLOPES and the (differential) occurrence of stone field walls and terraces.
- Anne Knowles examined the decisions made by the commanders at Gettysburg with the GIS analysis technique; ‘Fusia Analysis’, looking at the topography of the land, vegetation, etc. and observing how it had changed.
- We need map projections to translate the 3D SURFACE of the ‘Earth’ to a 2D PLANE.
- The MGA (Map Grid of Australia) uses vertical strips (zones) which are at a regular spacing of 6 degrees.
- The Central meridian of an MGA zone is arbitrarily defined as 500 000 metres. This value is chosen, rather than zero, as each 6 degree segment at it’s widest point is just under 1 000 000 metres. This way, we ensure a NON-NEGATIVE co-ordinate.
- Attributes attached to spatial objects in a GIS database can be used for symbology, analysis, labelling, selection and filtering. Not for measuring the distance between points.
- When recording spatial data; Vector is points, lines and shapes. Raster is a grid of cells containing a set of values.