GISP 6: Analytical Methods questions with correct answers|100% verified

GISP 6: Analytical Methods questions with correct answers What are the ways you can SELECT features based on ATTRIBUTE? -New Selection -Add to Selection -Remove from Selection -Subset Selection -Switch Selection -Clear Selection Semivariogram a model of the variance between points and their distance apart What is map algebra? set of primitive operations that allows two or more raster layers of similar dimensions to produce a new raster layer using algebraic operations such as addition, subtraction etc. What is Classification? process of representing members of a group by the same symbol, usually defined in a legend What is the one of the most basic questions asked of a GIS? "what's on top of what?" e.g. What landuse is on top of what soil type? e.g. What parcels are within the 100-year floodplain? e.g. What roads are within what counties? What are the methods of spatial selection involving CONTAIN? -Contains - features contain an input polygon -Completely contains - features must be completely in an input polygon -Contains Clementini - features must be completely in the input polygon but if it's on the boundary, it will not be selected -Contained by - Same as within What are the four classes of map algebra transformations? -local -focal -global -zonal What are the two methods for performing overlay analysis? —feature overlay (overlaying points, lines, or polygons) -raster overlay What is the most basic use of classification in GIS, cartography and remote sensing? Generalize complexity in and extract meaning from geospatial data. Range The distance on a semivariogram where the model first flattens out What are the three basic methods of spatial selection? -Intersect -Within a distance -Are Identical To - features are identical to input layer How do LOCAL OPERATIONS work in the context of map algebra transformations? -work on individual pixels -combine rasters that overlay each other -e.g. add/subtract/etc. cells that are in same location What are the basic steps to overlay analysis methodology (based on Boolean logic)? a. Define problem b. Break problem into submodels c. Determine significant layers (and if some of these layers need to be created) d. Reclassify or transform data within a layer (e.g. union) What is a classification schema (or key)? Set of criteria based on feature's attributes used to decide which individuals go into each class Sill The value that the semivariogram model attains at the range (on the y-axis) What is Spatial Overlay?