Intro To GIS

Question 1

What is the concept behind GIS?

Answer 1

GIS integrates hardware and software tools used to capture data, store, manipulate and manage said data, visualize data captured and analyse data captured.

Question 2

What are the forms/techniques in which data is captured?

Answer 2

Remote sensing
GPS
Scanning
Data can be captured as vector/raster data
Digitizing
Imaging

Question 3

GIS data storlaget , manipulation and processindustrin.

Answer 3

Database: data can be stores in a database .
Filés: data can Alsobe stored as stand alone filés.
Raster data: grid base data
Vector data: point, line and polygon data .
Projections and coordinate systems: these define how spatial data is represented on a map . It ensures that GIS layers align with coordinate reference systems .
Correcting errors: involves detecting and fixing spatial inaccuracies such as misplaced points , topological errors or attribute data mistakes.
Conversion : transformation of GIS data form one form to another ( vector to raster or vice versa).
Georeferencing : involves aligning raster images to real world coordinates known as control points .

Question 6

True or false :
Data can normally be found in national databases but new data sources come up all the time

Answer 6

True

Question 8

What DOes GIS consist of ?

Answer 8

Hardware, software, GIS professionals and data

Question 9

What does geographical data always have ?

Answer 9

Place : coordinate
Attributes : the actual data to be realized ( is it a farm or a boat , or a bike lane)
Times: the specific time data was collected .

Question 10

True or false: GIS maps usually serve as a basis for decision making

Answer 10

True .

Question 11

Site analysis ?

Answer 11

This is finding the right site for a project depending on a number of listed /defined criteria.
NB : the broader or more generic your criteria are the sites you have to sift through .

Question 12

What should always be present on a GIS map?

Answer 12

Scale bar , legend, title , map body,

Question 13

Summary about GIS

Answer 13

This helps to solve geographical problems( what is where)
There are huge amounts of data.
It is a process ( data capture, storage ,analysis manipulation, representing/visualization) and requires both hardware and software.
Huge amounts of data available.

Question 15

What is attribute data?

Answer 15

Attribute data is the descriptive information attached to spatial features. While spatial data describes geographic information (location , shape)attribute data describes characteristics (the what )