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Raster Tools Lookup by Table
This tool creates multiple rasters by looking up values found in another field in the table of the input raster. For more detailed help see ESRI Help for the ‘Lookup (Raster)’ tool.
- TIP: Note that you will need to use the Raster > Build Attribute Table tool to generate Raster Attribute Tables for the output (integer) raster datasets.
Table for Rasters: This is the input table, usually the results table generated by the Geodata > Search tool, but it can be any table with a field containing the full path to the rasters you want to clip. If the Input Table is a DBF, or a table in an ESRI File Geodatabase, then you can select a subset of rows in ArcMap and only those rows will be processed by the tool.
Field for Raster: Select the field from the 'Table for Rasters' that contains the full path to the raster items you want to process.
Field for lookup fields: For each raster dataset this is the field in the ‘Table for Rasters’ input table that contains a list of fields you want to use to convert into new raster datasets. This list can be created by running the ‘Geodata > Describe’ tool. The result table from the ‘Describe’ tool generates list of all fields in the ‘table_fields’ column. You can create the desired list by editing the ‘table_fields’ column in the describe results table. Fields used in this way, to create new raster datasets, can be a numeric or string type.
Format for output rasters: Raster format for output geodata. You can choose from: Esri Grid, img (ERDAS IMAGINE) or tif (GeoTIFF). If you select a file geodatabase for the Result Workspace then the output format will default to ‘Esri Grid’. When storing your raster geodata to a JPEG file, a JPEG 2000 file, a TIFF file, or a geodatabase, you can specify a compression type and compression quality within the ‘Environment Settings’.
Output Workspace: This is the location for the Grid Garage results table containing the list of geodata processed by the tool as well as any data outputs. If the tool encounters any errors when processing the input geodata then a second results table will be generated, with a ‘_FAIL’ suffix, listing the input geodata that failed and any ESRI error messages.
If you have set the ArcGIS ‘Workspace' parameter in the Geoprocessing > Environment Settings then this path will be used as the default. You can use this default path or click the folder button to select a new output location which can be a folder or File Geodatabase. If you specify a folder then the Results Table will be written to a comma-delimited (CSV) text file, if you specify a File Geodatabase it will be written as a Geodatabase Table.
Result Table Name: You can choose to use the default table name or specify a different name for the Grid Garage results table. The Grid Garage results table reports on a range of different properties for each of the geodata items in the 'Table for Geodata' input table. See the Grid Garage User Manual for a description of all the properties reported on.
If the tool encounters any errors when processing any of the geodata then a second results table will be generated, with a ‘_FAIL’ suffix, listing the input geodata that failed and any ESRI error messages. If you choose a folder for the Output Workspace then the result table will be written to a comma-delimited (CSV) text file which will not allow you to select rows for processing when using the table as input for other Grid Garage Tools.
Result Table file name: The default name will always take the form of ‘LookupByTableRasterTool_date_time’, where ‘date’ and ‘time’ are the date and time that the tool was run.
Output File Workspace (optional): If you want the output geodata files to be saved in a different location to the ‘Output Workspace’ you can select a new location (folder or File Geodatabase, depending on the output file type). The result tables will still be written to the ‘Output Workspace’ specified above.
Output Filename Prefix (optional): Any text you enter in this input box will be added as a prefix (at the beginning) for all output file names.
Output Filename Suffix (optional): Any text you enter in this input box will be added as a suffix (at the end) for all output file names.