Cartographic Principles Flashcards
What are maps?
Maps are transformations of reality which are totally subjective.
Why is a map drawn?
For a purpose and to communicate.
What is cartography?
You take the real world and all its data and information and putting it onto a Cartographic map.
The process of mapping has two main activities, what are they?
1) Data collection (capturing spatial data, through surveying or remote sensing etc).
2) Data presentation (producing an artefact, that communicates it to the person who is reading the map).
What do you have to consider when developing a map? (2)
1) Availability of data
2) delivery methods.
What is G.I.S based on?
G.I.S. is based on location and on spatial attributes.
How long have maps been presenting data for?
A millennia.
Are we at the peak of map making?
Yes because more data is being collected; more maps are being produced than ever before.
What is the technology today/in future to create maps?(5)
- Sensor developments
- Positioning technology
- Web delivery
- Data integration (e.g. BIM)
- Visualisation
What are the cartographic principles? (5)
- Location, attributes
- Scale, projection, dimensional change
- Points, lines, areas, surfaces, sequences
- Generalisation and symbolisation
- Marginal data.
What real world data can be used on maps?
Location/topology, topology map is how things are connected on a map, quantitative/qualitative/attribute data.
What are global system based on?
Meridians and parallels (the graticule).
What unitS do we use in G.I.S?
Degrees, minutes, seconds or decimal degrees (E-W first, N-S next) OR East and North positive, West and South negative (possibly).
Why is there different coordinate systems?
Due to the irregularities on the earth. Each recognises a different centre to the earth, and different parameters for the ellipsoid.
What is projection?
A transformation of reality (using location data). Geographical coordinate position into a two-dimensional plane “coordinate”.
