Week 6+7+8 Flashcards
(23 cards)
Binary classification
A classification of spatial objects into two classes, typically denoted by a 0 class and a 1 class
Boolean algebra
Conditions used to select features with set algebraic conditions, including and, or, and not conditions
Classification
A categorization of spatial objects based on their properties
Dissolve
An operation that removes lines separating adjacent polygons that are considered equal, based on some characteristic or measure
Equal-area classification
A classification method that assigns classes such that each class corresponds to an equal area
Equal-interval classification
A classification method that assigns an equally spaced set of classes across the range of a variable
Modifiable Areal Unit Problem (MAUP)
The dependence of aggregate area statistics on the size and shape of the aggregation units
Set algebra
A method for specifying selection criteria based on comparison operators less than, equal to, greater than, and perhaps others
Dissolve
- Combine like features in a dataset.
- Used to simplify the data.
Buffer
A buffer area is a polygon or collection of cells that are within specified proximities of a set of features. A buffer operation is one that creates buffer areas
Clip (overlay)
The vertical combination of two data layers, with a clip layer typically designated that defines the extent and location of output areas, and that preserves only the data from the non-clip layer for the clip area
Geocoding
The process of assigning a geographic or projection coordinate to a data item that is based on a street address, town, and state or country
Intersection (overlay)
The vertical combination of two data layers, typically restricted to the extent of one data layer but preserving the data contained in both data layers for that extent
Network
A connected set of line features, often used to model resource flow or demand through real-world networks such as road or river systems
Overlay
The “vertical” combination of two or more spatial data layers
Union
The vertical combination of two spatial data layers, typically over the combined extents of the data layers, and preserving data from both layers
Map Algebra
The combination of spatial data layers using simple to complex spatial operations
Reclassification
Transform the attribute data associated with a single map layer; they involve the grouping of objects into classes according to the new values assigned to the objects
Neighborhood Operation
A spatial operation where the output location, area, or extent comes from operations on an area larger than, and usually adjacent to the input extent
Fuzzy
A collection of elements or objects without a well-defined boundary
Zonal functions
Calculates statistics on values of a raster within the zones of another dataset
Cost surface
A spatial depiction of the cost of traveling among locations in an area
