Spatial Analysis and Functions

There are a couple of ways to get to spatial analysis: Select by Location Geoprocessing Wizard

Proximity Analysis and Overlay Analysis

Proximity Analysis Locating features based on their distance from other features Buffering features Spatial Join – closest features

Buffering Buffer around selected points at 20 Km with dissolved boundaries Buffer around selected points at 30 Km.

Buffering with multiple rings Buffer with 3 rings at 5 Km distance, overlapping boundaries.

Buffer the boundary of a polygon Inside and outside the polygon boundary with a 5 Km buffer.

Polygon buffer including the polygon

Buffer using attribute values.

Buffer using a graphics

Spatial Join – Distance Calculation

Overlay Analysis Line in Polygon Point in Polygon

Overlay Analysis Polygon on Polygon

Union - OR Combines all attributes and features

Intersect - AND Only features and attributes in common, overlapping area.

Union All input features must be polygons A new shapefile is created with the combined information The new shapefile inherits attributes from the two input files You must recalculate area for the new features

Intersect Input points, lines or polygons on polygons For example – if you input lines with a polygon, you will get a line shapefile with the lines within the polygon. The output line shapefile will inherit the attributes of the polygon. The is an excellent analysis for determining area within a buffer.