Calculates the area of a polygonal object and stores the value in an attribute.The area is calculated in square map units, whatever they are.
被执行面积计算的类型是由参数类型选择的。
Input Ports
Input
This transformer accepts any feature. Features without an area geometry will have an area of 0.
Output Ports
Output
Features with the calculated area are output through this port.
Note: ">Note:Feature ordermay change in relation to other output ports. Feature order per port is maintained.
Parameters
Type
For the traditional projected area of features (excluding fully 3D geometries such as solids, meshes, or point clouds), usePlane Areaas the type.
For 2D geometries with additional elevation information, the option of calculating 3D sloped areas is available by selectingSloped Areaas the type. This option calculates the surface area of the feature, taking elevation into consideration.
For fully 3D geometries, the full surface area of the geometry will be calculated regardless of theType参数。
Area Attribute
The attribute that contains the area of the polygonal feature.
乘数
The multiplier parameter can be used to scale the area from being square ground units (the units of the feature's coordinates) to something else. This parameter may either be entered as a number, or can be taken from the value of a feature attribute by selecting the attribute name from the pull-down list.
For 3D geometries, the surface area is always returned.
Editing Transformer Parameters
使用一组菜单选项，变压器参数可以通过引用在工作区中的其它元件来分配。更先进的功能，如高级编辑，算术编辑，也是一些变压器可用。要访问这些选项的菜单，点击
适用的参数旁边。欲了解更多信息，请参阅变压器参数菜单选项.
定义值
There are several ways to define a value for use in a Transformer. The simplest is to simply type in a value or string, which can include functions of various types such as attribute references, math and string functions, and workspace parameters. There are a number of tools and shortcuts that can assist in constructing values, generally available from the drop-down context menu adjacent to the value field.
How to Set Parameter Values
Using the Text Editor
The Text Editor provides a convenient way to construct text strings (including regular expressions) from various data sources, such as attributes, parameters, and constants, where the result is used directly inside a parameter.
Using the Arithmetic Editor
The Arithmetic Editor provides a convenient way to construct math expressions from various data sources, such as attributes, parameters, and feature functions, where the result is used directly inside a parameter.
Conditional Values
Set values depending on one or more test conditions that either pass or fail.
Parameter Condition Definition Dialog
Content
Expressions and strings can include a number of functions, characters, parameters, and more.
当设定值 - 无论是直接在参数输入或使用的编辑之一构造 - 字符串和表达式包含字符串，数学，日期/时间或FME特征函数将具有评价这些功能。因此，这些功能的名称（在形式@ <FUNCTION_NAME>) should not be used as literal string values.
Content Types
| These functions manipulate and format strings. | |
Special Characters |
A set of control characters is available in the Text Editor. |
| Math functions are available in both editors. | |
| Date/Time Functions | Date and time functions are available in the Text Editor. |
| These operators are available in the Arithmetic Editor. | |
| These return primarily feature-specific values. | |
| FME和工作区特有的参数可被使用。 | |
| Creating and Modifying User Parameters | Create your own editable parameters. |
Dialog Options - Tables
与表样式参数变压器具有用于填充和操作价值的附加工具。
Table Tools
Row Reordering
|
Enabled once you have clicked on a row item. Choices include:
|
Cut, Copy, and Paste
|
Enabled once you have clicked on a row item. Choices include:
Cut, copy, and paste may be used within a transformer, or between transformers. |
过滤
|
Start typing a string, and the matrix will only display rows matching those characters. Searches all columns. This only affects the display of attributes within the transformer - it does not alter which attributes are output. |
进口
|
进口populates the table with a set of new attributes read from a dataset. Specific application varies between transformers. |
Reset/Refresh
|
Generally resets the table to its initial state, and may provide additional options to remove invalid entries. Behavior varies between transformers. |
Note:Not all tools are available in all transformers.
FME Community
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Search for samples and information about this transformer on theFME Community.
Keywords: Euclidean