Extracts the band and palette values from a raster at the location of one or more input points and sets them as attributes on the point feature.

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Typical Uses

  • Extracting elevations from a DEM and assigning them to point features
  • Extracting values from a numeric raster and assigning them to point features
  • Extracting color information from a raster and assigning it to point features

How does it work?

The PointOnRasterValueExtractor receives two sets of input features, Raster and Point, which must be in the same coordinate system. Only one raster may be used per group.

At each point’s position, values are interpolated for the corresponding point on the raster for each band and/or palette. A variety of interpolation methods are available. The interpolated values are added to a new list attribute, named _band{}.value and _band{}.palette{}.value, respectively.

Point features are output with the new list attribute, and rasters are discarded.

No attributes will be set for points outside the raster extents.

This transformer supports raster band selection. The RasterSelector can be used to modify this selection.


Choosing a Raster Transformer

FME has an extensive selection of transformers for working with raster data. They can be generally categorized as working with whole rasters, bands, cells or palettes, and those designed for workflow control or combining raster with vector data.

For information on raster geometry and properties, see Rasters (IFMERaster).


Input Ports

Output Ports


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, click beside the applicable parameter. For more information, see Transformer Parameter Menu Options.

Defining Values

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.

Dialog Options - Tables

Transformers with table-style parameters have additional tools for populating and manipulating values.


Processing Behavior


Feature Holding


Dependencies None
Aliases PointOnRasterOverlayer
History This transformer was previously named PointOnRasterOverlayer.

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Examples may contain information licensed under the Open Government Licence – Vancouver and/or the Open Government Licence – Canada.