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Geospatial single layer analysis: vector operation
Terms in this set (13)
is the process of creating an output polygon layer containing a zone (or zones) of a specified width around an input point, line, or polygon feature. Particularly suited for determining the area of influence around features of interest.
is a suite of tools provided by many geographic information system (GIS) software packages that allow the user to automate many of the mundane tasks associated with manipulating GIS data. Usually involves the input of one or more feature datasets, followed by a spatially explicit analysis, and resulting in an output feature dataset.
constant width buffers
require users to input a value by which features are buffered
variable width buffers
call on a premade buffer field within the attribute table to determine the buffer width for each specific feature in the dataset
multiple ring buffers
can be made such that a series of concentric buffer zones (much like an archery target) are created around the originating feature at user-specified distances
buffer that excludes the input polygon area.
similar to doughnut buffers but only buffer the area inside of the polygon boundary. linear features can be buffered on both sides, left side only, or right side only and can be buffered so that end points of the line are rounded.
combines adjacent polygon features in a single feature dataset based on a single predetermined attribute.
creates an output polygon layer by combining the spatial extent of two or more layers
creates an output layer based on a user-defined query that selects particular features from the input layer
combines features within a point, line, or polygon layer into a single feature with identical attribute information. Often, the original features will have different values for a given attribute.
Vector buffering options
constant or variable widths, multiple rings, doughnuts, setbacks, and dissolve.
Common single layer geoprocessing operations on vector layers
dissolve, merge, append, and select
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