3D Analyst Tools ArcToolbox

Symmetrical Difference, Union and Update Tools

Symmetrical Difference

How to use Symmetrical Difference Tool in ArcToolbox ArcMap ArcGIS??

Symmetrical Difference Tool

Symmetrical Difference Tool, Overlay Toolset, Analysis Toolbox

Symmetrical Difference

Features or portions of features in the input and update features that do not overlap will be written to the output feature class.

1.  Input Features

The input feature class or layer.

2.  Update Features

The update feature class or layer. Geometry type must be the same geometry type as the input feature class or layer.

3.  Output Feature Class

The feature class to which the results will be written.

4.  JoinAttributes (optional)

Determines which attributes will be transferred to the output feature class.

1. ALL—All the attributes from the input features will be transferred to the output feature class. This is the default.
2. NO_FID—All the attributes except the FID from the input features will be transferred to the output feature class.
3. ONLY_FID—Only the FID field from the input features will be transferred to the output feature class.

5.  XY Tolerance (optional)

The minimum distance separating all feature coordinates (nodes and vertices) as well as the distance a coordinate can move in x or y (or both). 

Union

How to use Union Tool in ArcToolbox ArcMap ArcGIS??

Union Tool

Union Tool, Overlay Toolset, Analysis Toolbox

Union

Computes a geometric union of the input features. All features and their attributes will be written to the output feature class.

1.  Input Features

A list of the input feature classes or layers. When the distance between features is less than the cluster tolerance, the features with the lower rank will snap to the feature with the higher rank. The highest rank is one. All of the input features must be polygons.

2.  Output Feature Class

The feature class that will contain the results.

3.  JoinAttributes (optional)

Determines which attributes from the input features will be transferred to the output feature class.

1. ALL—All the attributes from the input features will be transferred to the output feature class. This is the default.
2. NO_FID—All the attributes except the FID from the input features will be transferred to the output feature class.
3. ONLY_FID—Only the FID field from the input features will be transferred to the output feature class.

4.  XY Tolerance (optional)

The minimum distance separating all feature coordinates (nodes and vertices) as well as the distance a coordinate can move in X or Y (or both).

5.  Gaps Allowed (optional)

Gaps are areas in the output feature class that are completely enclosed by other polygons. This is not invalid, but it may be desirable to identify these for analysis. To find the gaps in the output, uncheck this parameter—a feature will be created in these areas. To select these features, query the output feature class based on all the input feature's FID values being equal to -1.

1. Checked—No feature will be created for areas in the output that are completely enclosed by polygons. This is the default.
2. Unchecked—A feature will be created for the areas in the output that are completely enclosed by polygons. This feature will have blank attributes and its FID values will be -1.

Update 

How to use Update Tool in ArcToolbox ArcMap ArcGIS??

Update Tool

Update Tool, Overlay Toolset, Analysis Toolbox

Update

Computes a geometric intersection of the Input Features and Update Features. The attributes and geometry of the input features are updated by the update features in the output feature class.

1.  Input Features

The input feature class or layer. Geometry type must be polygon.

2.  Update Features

The features that will be used to update the Input Features. Geometry type must be polygon.

3.  Output Feature Class

The feature class to contain the results. Do not set this to be the same as the Input Features.

4.  Borders (optional)

Specifies whether the boundary of the update polygon features will be kept.

1. Checked—The outside border of the Update Features will be kept in the Output Feature Class. This is the default option.
2. Unchecked—The outside border of the Update Features are dropped after they are inserted into the Input Features. Item values of the Update Features take precedence over Input Features attributes.

5.  XY Tolerance (optional)

The minimum distance separating all feature coordinates (nodes and vertices) as well as the distance a coordinate can move in X or Y (or both).