Exploring the Align Dialog Box - MapInfo_Pro_Advanced - 2023

Input

In this section, select the raster that you want to align from the drop-down list. If the raster file is not already open, browse to a file location to open your raster file.

When you click in the Primary Raster drop-down list, you will get the list of open raster files to choose from. Click the Primary Raster drop-down list to select the raster that you want to use as reference raster. Your input raster's origin, cell size and projection will be adjusted to align with the selected primary raster.

If the raster file you have selected has multiple fields and bands, the Select Fields, Bands drop-down list appears. You can select a field from the drop-down list. For more information see, Multi-field and Band Support in Align.

Align Options

The Align Options section consists of the following:

• Override Cell Size - Select Override Cell Size if you want to use a specific cell size instead of primary raster's cell size. You can then specify a cell size in the New Cell Size box to override the primary raster's cell size. This is useful when you want to specify your own cell size in the output raster instead of using the cell size of the primary raster.

• Resample Methods - This drop-down displays a list of options to determine how you want to resample the different input rasters. You have three options:

  1. Nearest - It is the most simple interpolation whereby the new image cell value is taken from the closest image cell in the input raster. The Nearest Neighbor method should be used for raster data sets with color maps such as land use or pseudo color images.
  2. Bilinear - Bilinear method should be used for data such as satellite imagery or aerial photography. The value of a grid cell in the output raster is assigned the weighted value of the four surrounding image cells in the input raster.
  3. Bicubic - Bicubic is similar to Bilinear interpolation method; however, it resamples the data using a larger matrix. It uses the weighted value of 16 surrounding image cell values in the input raster to interpolate the value of a grid cell in the output raster. This method requires more processing but is more accurate than bilinear interpolation. Bicubic interpolation also produces a smoother image.

• Interpolation Null Handling Mode - If the input raster field type is classified, imagery, or image palette, this drop-down provides options to determine how you want to handle the null values in the input raster during the raster to raster interpolation. This option does not appears for continuous field type. It has the following options:

  When calculating the new cell values, you can choose to ignore any cells with invalid data. There are three ways to handle the invalid cells.

  1. Any Invalid - If any of the cell values, participating in the interpolation for computing the new cell value, is null then output cell value will also be null.
  2. Fifty Percent Or More Invalid - If fifty percent of the input values participating in the interpolation for computing the new cell value are null, then output cell value will also be null.
  3. More Than Fifty Percent Invalid - If more than fifty percent of the input values participating in the interpolation for computing the new cell value are null, then output cell value will also be null.
  4. All Invalid- If hundred percent of the input values participating in the interpolation for computing the new cell value is null, then output cell value will also be null.

• Interpolate From Base - Select this option to generate overviews from the base level.

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.
  For more information, see Encoding Type.