GEOM1004-spatial_analysis-W22

Vector operations

Operations that manipulate vector data, such as point, line, and polygon manipulations.

Raster operations

Operations that manipulate raster data, typically involving pixel-based spatial analyses.

Buffering

The creation of a polygon that is a specified distance around a point, line, or area feature.

Spatial analysis

The process of analyzing spatial data to identify patterns, relationships, and trends.

Local operations

Operations that work on single cell locations in raster data.

Focal operations

Operations that involve cell locations within a neighborhood, using a moving window.

Zonal operations

Operations that work on cell locations within defined zones.

Point-in-Polygon

A vector operation used to determine if a point is inside a given polygon.

Line-in-Polygon

A vector operation that assesses whether a line intersects with a polygon.

Intersection (AND)

A vector operation that identifies the overlapping areas between two datasets.

Union (OR)

A vector operation that combines two datasets to create a new dataset containing all areas from both.

Erase (NOT)

A vector operation that removes areas of one dataset from another.

Symmetrical Difference (XOR)

A vector operation that finds areas in either of two datasets but not in their intersection.

Reclassification

The process of changing the values of a raster dataset based on specified criteria.

Aspect

The cardinal direction that a slope faces, measured in degrees.

Slope

The maximum rate of change between cell values in a raster dataset.

Clipping

A vector operation that cuts out a portion of a dataset based on a specified boundary.

Identity

A vector operation that returns features that overlap with the input geometries.

Splitting

The process of dividing a dataset into smaller, more manageable pieces.

Identity (Vector)

An operation where the features from the input layer are preserved along with the overlay features.

Clipping (Raster)

The process of cutting down raster data to a specified extent.

Raster Calculator

A tool used in GIS to perform calculations on raster datasets.

Majority Filter

A focal operation that assigns the value based on the majority of neighboring cell values in a moving window.