Lecture 2 Flashcards
GIS is used for
spatial and statistical methods to analyze attribute and geographic information.
what is the end result of GIS
to analysis and derivative information, interpolated information or prioritized information
Buffer Analysis
How many trees are within 250 ft of your home
Line of sight Analysis
what area is the cellular service the strongest
Street Network Analysis
How walkable is the neighborhood
Hot Spot Analysis
Where are areas of high Crime
NDVI Satellite Imagery
Different types of vegetation in an area
We describe any element of our world in 2 ways
Location and Attribute
GIS data Input includes:
Existing maps, Field Observations and Sensors
Data Input Devices
Terminals, Digitizers, scanners, Hand Held Devices, Field Collection Units (Total Stations, Digital cameras)
Satellites Types
Spot, Landsat, Radarsat, ERS, NOAA, Sentinel-2
Binary machine Code
Value is categorized as 1 if odd or 0 if even then divide by 2 until base value
13 -1
(13-1)/2 =6 - 0
(6-0)/2 =3 - 1
(3-1)/2 =1 -1
1011
Meridians ( Longitudes )
is zero on the Greenwich Meridian and undefined at the poles, because all the longitudinal meridians intersect there
Parallels ( Latitude )
is zero on the Equator
Datum
Basis for reference systems by establishing origin of Lat and Long. Ellipsoid fixed through a physical network of precisely measured points
