Introduction to Geomatics Flashcards
What is the first law of geography?
Everything is related to everything but near things are more related
Shape of earth?
Ellipsoid or sphere or “earth shape”
How do you collect spatial (geographic) data?
- ) Global positioning system
- ) Remote sensing
- ) Field observation, data collection
- ) Census and other remote field methods
What are some examples of geomatics?
1Geographic information systems
2Cartography
and
3remote sensing and aerial photography
GIS
Consists of a digital database system specially designed for entering, storing and manipulating spatially referenced data. It also includes the ability to analyze, represent and manipulate spatial information.
Cartography
science of map making
Remote sensing and Aerial photography
Making physical observations without direct contact or touch.
Define Geographic information
Phenomenom on or near surface
Define Digital Geographic Information
Allows us to bring it to a GIS software
what is the area of study?
The place we are interested in studying ex.) City of Saskatoon
What is the Unit of analysis?
Has to be smaller than area of study. More detailed and zoomed in. ex.) Neighborhoods or blocks.
Global Positioning system
There are 24 satellites orbiting in 6 different planes, 4 satellites in each plane. In order to calculate a location you need 3 satellites.
- Satelites submit a time not a location signal, and they all submit the same time. But the signals reach you at different times. Trilatersation is the formula that is used.
What is GIS
Geographic Information system ( special kind of information system)
How can GIS be applied?
- ) Human Geography
- ) Physical Geography
- ) Geographic techniques
Types of GIS operations
Input, storage, manipulation, communication and retrievl
