Given the above three raster layers and using map algebra concepts and functions, what should be the output layers (OutLayer) of the following operations? Provide your answers by cells from left to right, and then top to bottom. OutLayer = Overlay (LayerA + LayerB). Ignore Layer C in this question.

“As we treat map layers as numbers using Map Algebra, the sequence of operations of Layer1 + Layer2 * Layer3 should be executed according to the algebraic rules in the sequence of Layer2 * Layer3 + Layer1. “

“Defining a watershed involves six major steeps, and some of them are included here. Arrange them in the best sequential order of a, b, and c, ignoring the missing step(s). “

“During a neighborhood operation, all moving windows have the same dimension and the same set of weights within the study area”

“Viewshed can be computed for a view point location, a line or an area. “

There are two general types of buffer in respect to direction. What are they? Explain their differences.

MA: When vector overlay operation of intersect is applied, what is/are the possible feature type(s) of the outputs conceptually, given the following input feature types? Overlaying line features with polygon features. 

MA: When vector overlay operation of intersect is applied, what is/are the possible feature type(s) of the outputs conceptually, given the following input feature types? Overlaying polygons features with polygon features. 

“Spatial analysis functions or operations may be categorized according to their spatial scope (i.e., the spatial extent of input area that is used to determine the values in the output locations). What are the three spatial scopes? , , “

“If DEM data are highly accurate in reflecting elevation on the ground surface, viewshed analysis should be 100% certain in determining the intervisibility between any two locations on the ground.”