Input File
Select an input vector file (MapInfo TAB) for conversion into a grid file. You must select a 2D vector file containing region objects.
Rasterize Options
The Rasterize Options section contains the following:
- Assign Value - Determines the cell values for the input region object
in the output raster. It depends on the following parameters. Select one of the
following:
- Null
- Fixed Value
- From Column - When you select From Column, you need to specify the TAB column name in the Select Column field.
- Overlay Field - Select the field of the TAB file that will be used to create overlay field. The attribute values from this column will be assigned to the output raster.
-
Select Columns - Select additional attribute columns from input TAB file.
If you want to create continuous (Numeric) output raster and you select more than one numeric attribute columns from the Input TAB file, the output file will contain a single field and multiple bands corresponding to each selected attribute data.
If you want to create classified output raster and you select more than one attribute columns from the Input TAB file, the output file’s classification table will contain table fields corresponding to each selected attribute data.
- Cell Value Assignment - If there are overlapping objects in the TAB file, the value from the selected field can be handled according to the various overlay operators. The operators are explained here.
- Cell Size - Denotes the cell size of the output grid. You can change the cell size according to your requirements.
Click More Option, to control the following.
- Output Raster Type - Denotes whether the output raster is to be saved as a Classified or Continuous.
- Background Value - Denotes the background cell values of the output raster, if you have selected Numeric as the output raster type.
- Data Units - Select the MapInfo units for the output raster.
- Output Geometry - Specify the raster bounds for the output raster. You can limit the output data points according to specified region (bounds) and ignore all points that lie outside of the specified region. The output file will contain data for the specified region only.
Output File
Specify a name, location and format for the output raster that you are creating. In the
Output File box enter the name you want to specify for
your output file. Click 
to browse to the location in
your computer to save the output file. You can also select the required output file
format.
Click Output Settings to specify the following. The values in Output Settings are controlled by the Raster Preferences dialog; however, you can override those settings here.
Display Output File - Select the check-box, if you want to open the output file in the Map window on completion of the operation. You can configure to make this the default behavior from the Raster Preferences dialog.
If the output file format is an MRR or a TIFF, additional options appear. The available options are listed below.
- Compression Settings
- Data Balanced
- Data Speed
- Data Space
- Advanced
The Data Balanced option allows you to achieve a balance between speed of operation and file size. The system selects the best combination of speed and space for you. With the other two options Data Speed and Data Space, you can choose between speed of operation and storage space. Choose Advanced option to set the advanced compression settings such as compression method, level, and encoding type. For details on the Advanced option, see Compression Settings.
- Compression- Select a suitable compression method and level for the data. For more information on compression, see Compression methods.
- Encoding Type - Select a suitable Encoding Type for the data from the list. It enables you to compress the data when saving a raster to MRR format. Encoding Type is enabled only when the raster field type is Continuous and the compression method is lossless such as ZIP, LZMA or LZ4. The drop-down list contains the following:
- None - No encoding.
- Previous Column Linear - Performs linear estimation of the value from previous two columns.
- Previous Column Value - Predicts the value from previous column.