Practice Quiz Flashcards
Spacial data acquisition is achieved by means of:
- Sattelite & remote sensing
- Handheld & Vehicle GPS
- Unmanned Aerial Vehicles
Is Universal Transverse Mercator an example of geographic projection system
No
Selecting data based on the specific content stored in a field refers to what
Select by attribute
Key applications of GIS is used in:
-environmental Science
- Agriculture
- Demographic studies
Map, Insert, Analysis, View, Edit, Imagery and Share are tools located in:
The Ribbon
The ITM co-ordinate for the spire of Dublin is: 715830, 734697 which means,
The fist figure is the easting and means that the location is 715830 metres east from the false origin (along the X axis).
The second figure is the northing and puts the location 734697 metres north of the false origin (along the Y axis)
What does a projected coordinate system have?
Constant lengths, angles, and areas across the two dimensions
Spectral data from satellite imagery is made up by:
Pixels
Uniform cell size is a description of:
Raster data
What does clipping achieve
Use it when you want to cut out a piece of one feature class using one or more of the features in another feature class as a cookie cutter.
What do you intersect for
This takes both feature classes as inputs and outputs features from both layers, overlaying or not, and creates a new feature class sharing the same spatial extent.
When would you want to merge
To combine multiple datasets into a single new output dataset
How are land parcels represented in GIS
By Polygons
Polygons are used in GIS to measure the area and perimeter of a particular location.
Roads would be what kind of data
Line
96^0 30’ 00’’ is an example of what coordinate format?
Degrees, minutes and seconds
Another way to describe a shapefile
Shapefiles are a type of feature class.
So a polygon feature class
An example of a raster file
pH layer
Vector data is represented as:
Either points, lines, or polygons.
The two main types of files used in GIS are
Geospatial data is created, shared, and stored in many different formats. The two primary data types are raster and vector.
Examples of continuous data in raster GIS include
Elevation or temperature data.
An example of vector data in GIS
Point Data: Data that specifies a single location, such as important points, electric poles, and valves belonging to the water network. …
Line Data: Data that connects natural or artificial structures, such as roads, rivers, railways, telecommunications lines, and ship routes.
