在这个例子中，我们将装配从哨兵2卫星数据，它是从云服务使用所检索的RGB光栅哨兵2 AWSReader. There are numerous layers of data available, of different wavelengths and resolutions. B2, B3, and B4 contain the data we want:

• B2： 蓝色
• B3: Green
• B4: Red

读取三个频带后，将各单波段栅格特征相结合，与一个RasterBandCombiner（一个），然后亮*（因为它们是非常暗）有RasterExpressionEvaluator（B）。

The bands are combined in the same order the features were received from the web service. Inspecting the output after combining and brightening（C），我们可以看到光栅功能的当前结构。

Note the band order and band numbers: 0 - Blue, 1 - Red, and 2 - Green.

所需的顺序是红，绿，蓝，所以栅格要素被路由到一个RasterBandOrderer。在参数的对话框，所期望的输出顺序由输入带索引号，用空格隔开表示。

The new order will be 1, 2, 0 - red, green, blue.

输出栅格功能包含在所要求的顺序乐队。需要注意的是带索引号已被重置。

尽管图像视觉上看起来一样的,竞争wed in the FME Data Inspector, the band order is important if we wish to write the data to most raster formats.

*简单的增亮已经做了这个例子，25单元格值乘以。

该实施例中包含修改哥白尼哨兵数据2019。

Working with Rasters

These transformers generally apply to whole rasters.

RasterCellOriginSetter	设置在光栅单元格内的细胞起源点。
对栅格	Applies a convolution filter (sometimes called a核心orlens) to raster features and outputs the results.
RasterExpressionEvaluator	Evaluates expressions on each cell in a raster or pair of rasters, including algebraic operations and conditional statements.
RasterExtentsCoercer	Replaces the geometry of input raster features with a polygon covering either the extents of a raster or the extent of data within a raster.
RasterGCPExtractor	提取物地面控制点(GCP) coordinate system and point values from a raster feature and exposes them as attributes.
RasterGCPSetter	集地面控制点s(GCPs) on a raster, pairing cell positions with known coordinates.
RasterGeoreferencer	Georeferences通过或是已知的角坐标或起源，细胞大小和旋转光栅。
RasterHillshader	Generates a grayscale shaded relief representation of terrain, based on elevation values.
RasterInterpretationCoercer	Alters the interpretation type of rasters, including all bands, and converts cell values if necessary.
RasterMosaicker	合并多个栅格功能到一个单一的栅格要素。
RasterPropertyExtractor	提取物the geometry properties of a raster feature and exposes them as attributes.
RasterPyramider	重新采样栅格以多种分辨率的基础上，无论是数水平或最小输出栅格的尺寸。
RasterRegisterer	转换的图像，以尽量减少其与另一个区别。
RasterResampler	Resamples rasters, based on specified output dimensions, cell size in ground units, or percentage of original, and interpolates new cell values.
RasterRotationApplier	旋转的栅格要素根据其旋转角特性，内插新的小区的值，更新所有其他受影响光栅的特性，并产生具有零的旋转角的输出光栅的功能。
RasterSharpener	Enhances the features of a raster image. The RasterSharpener enhances the borders, lines, and curves while reducing noise in the flat areas of the raster image.
RasterSubsetter	Clips raster features using pixel bounds instead of ground coordinates, and optionally adds cells around the perimeter.
RasterTiler	Splits each input raster into a series of tiles by specifying either a tile size in cells/pixels or the number of tiles.
RasterToPolygonCoercer	Creates polygons from input raster features. One polygon is output for each contiguous area of pixels with the same value in the input raster.
WebMapTiler	Creates a series of image tiles that can be utilized by web mapping applications such as Bing™ Maps, Google Maps™, or Web Map Tile Service. This is done by resampling rasters to various different resolutions and then splitting them into tiles.

Working with Bands

These transformers generally apply to bands.

RasterBandAdder	添加一个新的乐队为栅格功能。
RasterBandCombiner	Merges coincidental raster features into a single output raster feature, preserving and appending all bands.
RasterBandInterpretationCoercer	Alters the interpretation type of individual raster bands, converting cell values if necessary.
RasterBandKeeper	Removes all unselected bands from a raster feature.
RasterBandMinMaxExtractor	提取物the minimum and maximum band values, palette keys, and palette values from a raster feature, and adds them to a list attribute.
RasterBandNameSetter	集the band name of selected bands on a raster, making raster contents simpler to understand compared to band numbers.
RasterBandNodataRemover	Removes the existing nodata identifier from selected bands of a raster feature. Any values previously equal to the nodata value are considered valid data.
RasterBandNodataSetter	集a new nodata value on selected bands of a raster feature.
RasterBandOrderer	指定一个栅格波段的要求的顺序。频带根据输入频带索引重新排序。
RasterBandPropertyExtractor	提取物the band and palette properties of a raster feature and exposes them as attributes.
RasterBandRemover	Removes any selected bands from a raster feature.
RasterBandSeparator	Separates bands or unique band and palette combinations, and outputs either individual raster features or a single new raster feature containing all combinations.
RasterStatisticsCalculator	计算栅格波段的统计数据，并增加了结果的属性。

Working with Cells

这些变压器一般适用于单个细胞。

RasterAspectCalculator	Calculates the aspect (direction of slope) for each cell of a raster. Aspect is measured in degrees from 0 to 360, clockwise from north.
RasterCellCoercer	创建单独的点或面用于在光栅的每个小区，任选提取频带值作为Z坐标或属性。
RasterCellValueCalculator	Evaluates basic arithmetic , minimum, maximum or average operations on the cell values of a pair of rasters.
RasterCellValueReplacer	Replaces a range of band values in a raster with a new single value.
RasterCellValueRounder	Rounds off raster cell values.
RasterSegmenter	Partitions a raster image into arbitrarily sized groups of cells from the input image based on intensity differences in the input raster image cells.
RasterSingularCellValueCalculator	Performs basic arithmetic operations on the cell values of a raster against a numeric value.
RasterSlopeCalculator	计算栅格的每个小区的斜率（沿z最大变化率）。

Working with Palettes

These transformers generally apply to palettes.

RasterPaletteAdder	Creates a palette from an attribute, and adds this palette to all selected bands on a raster.
RasterPaletteExtractor	上创建一个光栅的现有的调色板的字符串表示，并将其保存到一个属性。
RasterPaletteGenerator	Generates a palette out of the selected band(s) of a raster. The output raster will have the selected band(s) replaced by a new band with a palette.
RasterPaletteInterpretationCoercer	改变了解释型光栅调色板。
RasterPaletteNodataSetter	标识相匹配的栅格波段的无数据值，并将它的值调色板关键。
RasterPaletteRemover	去除光栅特征选择调色板（一个或多个）。
RasterPaletteResolver	Resolves the palette(s) on a raster by replacing cell values with their corresponding palette values. Palette values with multiple components, such as RGB, are broken down and the individual values assigned to multiple, newly-added bands.

Workflow Control

These transformers generally control the flow of features in a workspace.

RasterCheckpointer	力量积累光栅操作过程ed, saving the state to disk and releasing resources to tune performance or assist with memory limitations.
RasterConsumer	Reads raster features for testing purposes, including any accumulated raster operations. No additional operations are performed, and nothing is done with the features.
RasterExtractor	Serializes the geometry of a raster feature into a Blob attribute, encoding the contents according to a choice of common binary raster formats.
RasterNumericCreator	Creates a numeric raster of specified size and resolution, with default cell values.
RasterReplacer	Decodes a binary attribute containing encoded rasters stored as Blobs, replacing the feature’s geometry with the decoded raster.
RasterRGBCreator	Creates a color raster feature of specified size, resolution, and interpretation type, with default cell values.
RasterSelector	Selects specific bands and palettes of a raster for subsequent transformer operations.

Vectors and Rasters

These transformers generally involve using rasters and vector data together.

ImageRasterizer	创建的矢量或点云输入特征的光栅表示，使用fme_color属性在固体背景填充为矢量要素。点云可使用它们的颜色或强度分量被呈现。
NumericRasterizer	创建的矢量或点云输入功能，其中，单元格值从输入要素的Z坐标取出并覆盖在均匀背景数字光栅表示。
MapnikRasterizer	Generates a raster from input vector and raster features, with fine control over symbolization and labeling, using the Mapnik toolkit.
PointOnRasterValueExtractor	提取物the band and palette values from a raster at the location of one or more input points and sets them as attributes on the feature.
RasterDEMGenerator	Produces a raster digital elevation model (DEM) by uniformly sampling a Delaunay triangulation generated from input points and breaklines.
VectorOnRasterOverlayer	光栅化矢量或点云特征到现有栅格。对于矢量要素的fme_color属性集的像素颜色，并且点云可使用它们的颜色或强度分量被呈现。

This transformer accepts only raster features.

Raster features with bands reordered as specified.

非光栅的特征将被路由到<拒绝>端口，以及无效栅格。

被拒绝的功能将有以下值之一的fme_rejection_code属性：

INVALID_GEOMETRY_TYPE
INVALID_RASTER_NO_BANDS

Rejected Feature Handling:can be set to either terminate the translation or continue running when it encounters a rejected feature. This setting is available both as a defaultFME选项and as aworkspace parameter。