Raster Data Analysis Flashcards
Which is a simpler form of data, raster or vector?
Raster
What is raster data and how is it organised
A matrix of cells
Organised into rows and columns
How are rasters stored
As an ordered list of cell values
What can the values seen in a raster grid be based on
Value can be based on center point or whole area of cell
What shape are raster cells
Square
What file format works best with raster data tools
Esri grid
What are raster zones
Two or more cells with the same value
Don’t have to be connected
What are regions
A group of connected cells with the same value
What are some common uses of raster data
Surface map, thematic maps, images
Which toolbox do you use for raster
Spatial analysis
What should you be careful of when converting raster to feature class
File size
Which is faster, raster or vector analysis
Raster
What makes raster projections smoother
Projecting into WGS1984 first then into the one you want
What does the reclassify vaster tool do
Change values in a raster, recode an existing value into a new value
What does the raster calculator do
Changes all the values in cells
