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| ESRI.ArcGIS.ADF.IMS | |
| ImageGeneralization Property | |
| See Also Send Feedback | |
| ESRI.ArcGIS.ADF.IMS.Carto Namespace > ImageDescriptor Class : ImageGeneralization Property |
Syntax
| Visual Basic (Declaration) | |
|---|---|
Public ReadOnly Property ImageGeneralization As String | |
| Visual Basic (Usage) |  Copy Code |
|---|---|
Dim instance As ImageDescriptor Dim value As String value = instance.ImageGeneralization | |
| C# | |
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public string ImageGeneralization {get;} | |
Remarks
This property determines whether the server generalizes features. The default is "true". Note that this is a string value. Valid string values are "true", "false", and string values for non-negative integers.
This property is only used with standard image services. It is ignored for ArcMap Server image services.
Generalization is used by the Image Server to speed up the processing of features, and by default, features are generalized. However, in certain cases, generalization causes some features or parts of features to drop out. This can happen with very small or narrow features. The features display when zoomed in, but as the user zooms out, part or all of an affected feature drops out. The tradeoff for not generalizing features is that the ArcIMS Spatial Server takes longer to process a request.
The accuracy is calculated based on the following formula:
(map extent width / image width ) / f
where f is the value assigned to mode. Features within this tolerance are generalized.
The attribute values for mode are interpreted as follows:
- If "true", the f value is set to "64". This is the default.
- If "false", the f value is set to "0". This means no generalization takes place.
- If a numeric value is used, the f value is assigned that numeric value. Therefore, if you use "100", the f value is set to "100". If a value less than "0" is used, the value will be reset to "64".
The smaller the accuracy, the longer the Spatial Server takes to process a request. A value of "0" will take the longest to process because no generalization is taking place. Setting mode to a value smaller than "64" may speed up the processing time, but more features will be generalized. You must remember that other factors such as the complexity of the data, complexity of the request, network traffic, and other factors can also cause a request to be slow.
Requirements
Target Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, Windows Vista, Windows Server 2008 family