ArcMap

Generate Raster Collection

Summary

Performs batch analysis or processing on image collections contained in a mosaic dataset. The images in the input mosaic dataset can be processed individually or as groups.

The rules of processing can be defined through the Collection Builder parameter and raster function parameters. It generates a new mosaic dataset of processed images. You can optionally choose to save the processed images to disk as separate files. The default condition is to append the input raster function to the mosaic dataset's existing images' function chain, and add it to the output mosaic dataset.

Usage

  • The output of this tool is a mosaic dataset with the raster function template (RFT) applied to each raster item. Since the optional parameters affect the output, you need to properly define the parameters in order to obtain the correct output.

  • If you want to generate separate image files with an RFT applied, you must define an output workspace. An RFT can be created using the Raster Function Editor.

Syntax

arcpy.management.GenerateRasterCollection(out_raster_collection, collection_builder, collection_builder_arguments, {raster_function}, {raster_function_arguments}, {collection_properties}, {generate_rasters}, {out_workspace}, {format}, {out_base_name})
ParameterExplanationData Type
out_raster_collection

The full path of the mosaic dataset to be created. The mosaic dataset must be stored in a geodatabase.

Mosaic Dataset
collection_builder

The input image collection. It can be seen as a template that contains arguments such as the source mosaic dataset path, filters to extract a subset from the input data source, and so on.

Currently, this tool only supports SIMPLE_COLLECTION, which allows you to define a single data source and a query filter for the data source.

  • SIMPLE_COLLECTION —Allows you to define a data source and a query filter.
String
collection_builder_arguments
[[Name, Value],...]

The list of arguments to create a subset collection of the mosaic dataset.

This tool only supports the data source and filter to subset the mosaic dataset. The DataSource and WhereClause values must be completed, otherwise the tool cannot be executed.

  • DataSource —The path of the data source.
  • WhereClause —The filter used to subset the mosaic dataset.
Value Table
raster_function
(Optional)

The path to a raster function template file (.rft.xml or .rft.json). The raster function template will be applied to every item in the input mosaic dataset. The Function Editor can be used to create the template. If no RFT is defined, this tool will create the output mosaic based on the collection_builder_arguments parameter.

String; File
raster_function_arguments
[[Name, Value],...]
(Optional)

The parameters associated with the function chain.

For example, if the function chain applies the NDVI function, set the visible and infrared IDs. The raster variable name of the RFT should be the Tag field value in the input data source.

Value Table
collection_properties
[[Name, Value],...]
(Optional)

The output mosaic dataset key properties.

The key metadata properties that are available is based on the type of sensor that captured the imagery. Some examples of key metadata properties include the following:

  • SensorName
  • ProductName
  • AcquisitionDate
  • CloudCover
  • SunAzimuth
  • SunElevation
  • SensorAzimuth
  • SensorElevation
  • Off-nadirAngle
  • BandName
  • MinimumWavelength
  • MaximumWavelength
  • RadianceGain
  • RadianceBias
  • SolarIrradiance
  • ReflectanceGain
  • ReflectanceBias

Value Table
generate_rasters
(Optional)

Choose to generate raster dataset files of the mosaic dataset items, after the application of the RFT.

  • NO_GENERATE_RASTERS —The processing defined by the raster function template will be appended to the image items from the input data source to produce an image item in the output mosaic dataset. This is the default.
  • GENERATE_RASTERS —Create raster datasets on disk. You will also need to specify the out_workspace and format.
Boolean
out_workspace
(Optional)

Defines the output location for the persisted raster datasets, if the generate_rasters parameter is set to GENERATE_RASTERS.

The naming convention for the output raster files is oid_<oid#>_<Unique_GUID>.

Folder; String
format
(Optional)

The format type of the raster to be generated.

  • TIFF —Tagged Image File Format (TIFF)
  • IMAGINE Image —ERDAS IMAGINE file
  • CRF —Cloud Raster Format. This is the default.
  • MRF —Meta Raster Format
String
out_base_name
(Optional)

Defines the output base name for the persisted raster datasets, if the generate_rasters parameter is set to GENERATE_RASTERS.

String

Code sample

GenerateRasterCollection example (stand-alone script)

This is a Python script for the GenerateRasterCollection tool.

import arcpy
arcpy.GenerateRasterCollection_management(
    out_raster_collection="c:/temp/FGDB.gdb/testgencollection", 
    collection_builder="Simple Collection", 
    collection_builder_arguments="# DataSource c:\temp\FGDB.gdb\qb_portland;# 
WhereClause 'Tag = 'MS''", 
    raster_function="C:/temp/NDVI_test.rft.json", 
    raster_function_arguments="# MS #;# VisibleBandID_20171019_7337_958 1;# 
InfraredBandID_20171019_7337_958 4", 
    collection_properties="", 
    generate_rasters="GENERATE_RASTERS", 
    out_workspace="c:/temp/persistedoutput", 
    format="CRF"
)

Environments

Licensing information

  • Basic: Yes
  • Standard: Yes
  • Advanced: Yes

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