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RasterCellvaluecalculator.

在一对栅格上执行算术运算。

第一个选择的光栅乐队一种与第一个选择的光栅B，第二选择的光栅频段组合一种is combined with the second selected band of raster B, and so on.

输入端口

输入功能具有以下限制：

  • 所有输入功能必须具有光栅几何。
  • Paired rasters must have the same number of rows and columns.
  • 成对的栅格必须具有相同数量的选择频段。
  • 配对频带必须具有相同的Nodata值，或者它们都必须没有Nodata值。
  • B.ands may not contain a palette.

输出端口

Closed输出

未选择的频带附加到输出栅格，不变。光栅的未选择的乐队一种首先被附加，然后是栅格B的未选择的频段。

参数

变压器

Closed通过...分组

对多个栅格进行计算，一组通过...分组attributes must be specified. Each group must contain one一种光栅和一个B.光栅。

通过...分组始终添加到输出功能中的属性。

Closed并行处理

Note:如何并行processing works with FME: see关于并行处理有关详细信息。

此参数确定变压器是否应跨行进程执行工作。如果启用了，将为每个组的组启动一个过程通过...分组范围。

并行处理水平

范围 过程数量
没有平行 1
最小 核心The processor, or CPU, is the physical part of the computer that performs mathematical calculations. It is the most important part of a computer system. Traditional processors have only one core on the processor, meaning that at any given time, only one set of calculations is being performed. If a processor is dual-core, this means the single chip contains hardware for two processors, now called cores to distinguish them from the single chip, running simultaneously, side by side. (Source: http://www.ehow.com/facts_5730257_computer-core-processors_.html)/ 2.
缓和 确切数量的核心
挑衅的 核心x 1.5
Extreme 核心x 2

例如，在四核机器上，最小的并行性将导致两个同时的FME进程。8核机上的极端并行性将导致16个同时流程。

You can experiment with this feature and view the information in the Windows Task Manager and the Workbench Log window.

Closed输入已订购

No: This is the default behavior. Processing will only occur in this transformer once all input is present.

按组: This transformer will process input groups in order. Changes on the value of the通过...分组输入流上的参数将触发当前累计组上的批处理。如果组很大/复杂，则会提高整体速度，但如果输入组未真正订购，则可能导致不期望的行为。

参数

Closed手术

This parameter sets the operation that will be performed:

+ 添加
- subtract
* 乘
/ 划分

最低限度

最大

平均数

 takes the minimum, maximum or average of一种and B

例如，如果选择加号（+），则两个输入栅格一种andB.will be added together (and therefore, the output raster will be A+B).

Closed保留解释

If Preserve Interpretation is set to Yes, each output band will have the same interpretation as its input bands when the input bands share the same interpretation. If the input bands have different interpretations, or Preserve Interpretation is set to No, the interpretation of each output band will be automatically determined.

Note that when converting between different data types, a Bounded Cast is used. As a result, when a calculated value does not fit in the destination interpretation, the corresponding destination value will either be set to the minimum or maximum value possible in the destination data type.

Closed累积属性

如果累积属性设置为yes，则从原始功能的属性将合并到输出功能上。按属性组始终添加到输出功能。

例子

相关变压器

Editing Transformer Parameters

Using a set of menu options, transformer parameters can be assigned by referencing other elements in the workspace. More advanced functions, such as an advanced editor and an arithmetic editor, are also available in some transformers. To access a menu of these options, clickbeside the applicable parameter. For more information, see变换器参数菜单选项。

变压器Categories

计算值

罗斯克斯

FME许可级别

FME专业版及以上

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标签关键词：光栅“有界演员”调色板