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PointCloudOnRasterComponentSetter

Sets point cloud component values by overlaying a point cloud on a raster. The component values for each point will be set from band values at the point location.

例如，潜在用例是使用正轨云彩色点云。

Input Ports

ClosedPointCloud

Point cloud features are input through this port.

Closed栅格

栅格features are input through this port.

输出端口

ClosedPointCloud

Point cloud features with updated component values are output through this port.

参数

变压器

ClosedGroup By

如果Group Byattributes are selected, features with the same values in theGroup Byattributes are grouped together, and rasters are only used to set component values of point clouds in the same group.

Closed并行处理

Note:平行处理如何与FME一起使用：见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Group Byparameter.

并行处理水平

参数 过程数量
No Parallelism 1
Minimal 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.
Moderate 确切数量的核心
Aggressive 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.

By Group: This transformer will process input groups in order. Changes on the value of theGroup By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。

零件s

Closed零件s to Set

Specifies which point cloud components should be set from the corresponding raster(s).

  • 颜色specifies that thecolor_red那color_green.那andcolor_bluecomponents of a point cloud should be set. In this case, the input rasters should have three selected bands.
  • Customallows specification of an arbitrary list of components.

指定自定义列表时，必须为每个组件指定以下值：

  • Bandspecifies the band index from which values will be taken.
  • 零件specifies the component whose values will be set.
  • Default Value将指定值set for points that are disjoint from all rasters.

参数

Closed提取栅格Nodata.

This parameter specifies the behavior when a point lies on a raster nodata value. If set to Yes, the point component value will be set to the nodata value. If set to No, the raster will be skipped, and the next raster checked. If no rasters are found to cover the point, then the Default Values Overwrite Data parameter determines the behavior.

Closed默认值覆盖数据

This parameter specifies the behavior when no value can be found for a point from any raster, but the component already existed on the input point cloud. If set to Yes, the component value from the input point cloud will be preserved. If set to No, the component value will be set to the default value, either from the default value list or the FME default.

Closed插值类型

单元值插值以在点云分量值到达。

  • Nearest Neighbor is the fastest but produces the poorest quality.
  • Bilinear provides a reasonable intermediate option.
  • BICUBIC是最慢但产生最佳质量。
  • Average 4 and Average 16 have a performance similar to Bilinear and are useful for numeric rasters such as DEMs.

Usage Notes

This transformer accepts multiple input point clouds and rasters. One point cloud is output for each input point cloud.

The component value for each point is taken from the first raster that can supply one (for example, if a point does not overlap a raster, the next raster will be tried), so the order of input for rasters can impact the result.

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变压器参数Menu Options。

变压器Categories

点云

栅格s

FME许可级别

FME专业版及以上

Search FME Knowledge Center

Search for samples and information about this transformer on theFME知识中心。

标签关键词：点“点云”云Pointcloud胁迫激光器声纳暴露提取物orthophotos pointcloudonrastervalueextractor