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 30 Km.
Buffer around selected points
at 20 Km with dissolved
boundaries
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
Point in Polygon
Line 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.