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Raster Tools Extract Values to Points

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TomWaterat edited this page Sep 7, 2017 · 4 revisions

This tool Extracts the cell values of a raster based on a set of point features and records the values in the attribute table of an output feature class. For more detailed ESRI Help see 'Extract Values To Points'.

User Inputs

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 process with this tool. 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 query (optional): If you specify a text field in the input feature geodata that describes an SQL search term, then this query will be applied before exporting the geodata. See ESRI Help for format of the search query.

Point Features: Select the folder icon to select the feature point dataset that contains the points you want to use for reporting on the raster pixel values.

  • TIP: This tool will only work if all the raster and the feature point datasets are in the same projection.

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 ‘ExtractValuesToPointsRasterTool_date_time’, where ‘date’ and ‘time’ are the date and time that the tool was run.

Options

Interpolate Values (Optional): Specifies whether or not interpolation will be used.

  • NONE — No interpolation will be applied; the value of the cell centre will be used. This is the default.
  • INTERPOLATE — The value of the cell will be calculated from the adjacent cells with valid values using bilinear interpolation. NoData values will be ignored in the interpolation unless all adjacent cells are NoData.

Add Raster Attributes (Optional): Determines if the raster attributes are written to the output point feature dataset.

  • VALUE_ONLY — Only the value of the input raster is added to the point attributes. This is the default.
  • ALL — All the fields from the input raster (except Count) will be added to the point attributes.

Output File (Dataset) Workspace

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 Affixes

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.

Home

  1. Why use the Grid Garage Toobox?

  2. Using the Grid Garage Tools

    1. Adding Grid Garage to the ArcMap ArcToolbox
    2. How does Grid Garage work?
    3. Input and output tables
    4. Geodata outputs
    5. Setting up the Geoprocessing Environment
    6. Issues and undocumented features

  3. Using Grid Garage tools in ArcGIS ModelBuilder

  4. Tutorials

    1. Sample geodata
    2. Tutorial 1: Basic use of Grid Garage tools

  5. Summary of Grid Garage Tools

  6. Technical documentation for Grid Garage tools

    1. Feature Tools
      1. Clip
      2. Copy
      3. Feature to Raster
      4. Polygon to Raster
    2. Geodata Tools
      1. Compare Extents
      2. Copy
      3. Delete
      4. Describe
      5. Display
      6. Generate Names
      7. List Workspace Tables
      8. Rename
      9. Search
      10. Select
    3. Metadata Tools
      1. Create Tips Table
      2. Export Metadata
      3. Export tips
      4. Import Tip Files to Table
    4. Raster Tools
      1. Aggregate
      2. Band Properties
      3. Block Statistics
      4. Build Attribute Table
      5. Calculate Statistics
      6. Clip
      7. Copy
      8. Extract Values to Points
      9. Lookup by Table
      10. Reclass by Table
      11. Reproject
      12. Resample
      13. Set NoData Value
      14. Set Value to Null
      15. To ASCII
      16. Transform
      17. Tweak Values
      18. Values at Points

  7. Building 'means-to-end' diagrams with Compendium

  8. Other tips

  9. Glossary of terms

  10. Known issues

  11. Acknowledgements

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