Raster Calculator

what does raster calculator combine

1. map query

2. map calculator

how is raster calculator different from interpolation

interpolation is trying to predict points based on some rule or criteria while the calculator takes the spatial context out

what is map algebra

cell by cell combination of raster layers using mathematical operations 

map algebra has strong ______ functions 

analytical 

what are the three steps of raster calculator

1. enter algebra expression

2. creates new raster layer

3. preform complex analysis

what value represents true? false?

true - 1

false - 0

what kind of statement is used in raster calculator

condition statement (output whether condition is true or false)

what are some of the main operators 

== (equal to)

& (and) 

| (or)

!=(not)

what does a nodata value mean

1. division by 0

2. there is originally no data in that cell so output will also be no data

what is important when combining commands

following bedmas

relational operators are statements that

evaluate specific relational conditions (true/false statements)

relational operators

==, <, >, <>, >=, <=

Boolean output

answer can only have 1 or 2 possible answers (true or false)

what is the syntax of condition statement

condition (ex. if) (condition, true, false)