17 - Raster analysis

Question 1

Why do floating cells not have a VAT

Answer 1

Because the cells in the grid can
assume any value within a given range of values

Question 2

Raster environment def

Answer 2

area of analysis (extent) and
output cell size (spatial
resolution/extent) of your raster

Question 3

The area of extent may correspond to? (3)

Answer 3

1) specific raster
2) area defined by minimum and maximum coordinates or
3) a combination of rasters.

Question 4

Analysis mask function

Answer 4

also be used to set the analysis environment.
The analysis mask limits analysis to all cells that do not have “no data” values

Question 5

GUI def

Answer 5

Graphical user interface - type of user interface through which users interact with electronic devices via visual indicator representations.

Question 6

Raster operations

Answer 6

1. Local
2. Focal
3. Zonal
4. Global

Question 7

Local operations

Answer 7

CELL BY CELL

Question 8

Types of local operations

Answer 8

1. Reclassification (recoding/ transforming)
2. Multiple raster analysis

Question 9

Reclassification methods

Answer 9

1. One-to-one change
2. Range-to-one change

Question 10

Focal operations

Answer 10

apply one calculation to all input raster cells within a “focus” / neighbourhood
- The focal cell is moved from one cell to the next to complete the operation.

Question 11

Mask def

Answer 11

Like clipping

Question 12

Mosaic def

Answer 12

Combining multiple rasters into a single raster