Remote Sensing Basics Flashcards
What does a Geographic Information System integrate and for what?
It integrates hardware, software and data for capturing, managing, analyzing, and displaying all forms of geographically referenced information.
What is an ESRI?
A form of displaying all forms of geographically referenced information.
What are the 3 data elements of GIS?
Vector, Raster, and Attribute
What is a vector data element?
A point, line, or polygon
What is raster data?
A grid
What is an attribute data elect?
A non spatial data attributable and assigned to spatial locations.
What is known as Vector data?
Objects presented as points and lines (arcs) that connect.
What is known as Raster Data?
A matrix of cells, organized into rows and columns, where each cell contains a value
What is surface mapping?
A representation of data that change continuously across a surface
What is remote sensing?
Techniques to acquire info about objects by detecting energy reflected or emitted by that object.
What is remote sensing best used for?
To derive quantitative information about an object or the geographical extent of a phenomenon.
How does one make electromagnetic energy measurements effective?
By processing it using visual/digital images] processing tools.
Why is RS a strong tool in relation to GIS?
Traditional data collection may not provide spatial info for a large area, and it is a means to collect data in an objective way over large areas.
What are some advantages to remote sensing?
It is unobtrusive as it does not affect the subject or area of interest, it is programmed to collect data systematically, provides fundamental information
What kind of observations will remote sensing include?
Aerial, satellite, and ground.
In terms of spatial resolution which is best for closer viewing? 1m resolution or 30m resolution?
1 meter resolution
What is known as multispectral resolution?
Multispectral imagery that can be provided at different resolutions and different band or types of light.
What is known as hyper spectral resolution?
Recorded spectra that have fine wavelength resolution and cover a wide range of wavelengths
What is known as temporal resolution?
Imaging that reflects passing of time at one specific location.
