Buffer Task Activity

Description:

Uses the ArcGIS Geometry Service to buffer a geometry.

Inheritance Hierarchy:

System.Object
  System.Activities.Activity
    System.Activities.AsyncCodeActivity
      Geocortex.Workflow.Activities.BufferTask

Function:

This activity applies a buffer around a given geometry surrounding it with a new geometry that should be larger than the initial geometry by a specified distance.

In a Workflow:

A workflow could consist of an activity that captures a point on the map from the user. The Buffer Task activity would then add a buffer to the point to create a polygon. The polygon could then be used in subsequent activities.

Properties:

Name Description

In Arguments

Buffer Spatial Reference

The spatial reference in which the geometries are buffered.

Credentials

The network credentials that are sent to the host and used to authenticate the request.

Custom Parameters

Additional parameters to include in the request.

Disable Client Caching

If true, adds a timestamp parameter (_ts) to the request to prevent it from being loaded from the application's cache.

Distance

The distance value that the input features are buffered.

Distances

The distance values that the input features are buffered. If both Distance and Distances arguments are supplied Distances is preferred.

FeatureSet

A collection of points, multipoints, polylines or polygons. The input types cannot be mixed. The FeatureSet for which all features will be buffered.

Geodesic

If true generate a buffer polygon using a geodesic distance. The default is false. If the input geometries are in a geographic coordinate system, then Geodesic needs to be set to true in order to generate a buffer polygon using a geodesic distance. The Buffer Spatial Reference will be ignored when Geodesic is set to true.

Geometry

The geometry to buffer.

Geometry Service Url

The URL of the ArcGIS Server Geometry service. For example: http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Geometry/GeometryServer.

Out Spatial Reference

The spatial reference for the returned geometries.

Proxy Url

The URL to proxy the request through.

Token

The token for accessing a secure ArcGIS task.

Union Results

If true, all geometries buffered at a given distance are unioned into a single (possibly multipart) polygon, and the unioned geometry is returned. The default is false.

Unit

The units for calculating each buffer distance. The units are derived from the input features.

Misc

Display Name

BufferTask

You can change the name of an activity to one that describes what it does. A descriptive name can make a workflow easier to interpret and maintain.

Out Arguments

Result

The resulting buffered geometries.

Unioned Result

The resulting buffered geometry as a single unioned result. This will only be set if Union Results is true.

Version Information:

Supported from: Geocortex Essentials 3.4.

© 2019 Latitude Geographics Group Ltd. All Rights Reserved.

Documentation Version 4.11