The reproject function changes the projection of a raster dataset from one projection system to another.
To reproject a raster:
- On the RASTER tab, in the Operations group, click Raster Operations and then click the Reproject button to open the Reproject dialog box.
- Select the Create MVR check-box to create the output in the Virtual Raster format. It is generated quickly and occupies negligible space.
- Select the Batch Mode check-box to process multiple inputs with the same set of input parameters in a single go.
- Select the file to be reprojected from the Input File drop-down list or click to browse the raster file(s).
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Select a specific field from the Select Fields, Bands drop-down list, you can then choose the desired bands from that field.
You can select multiple bands from any field, however, you can not select bands from different fields, because only one field can be selected at a time. Click the radio button against the field or check-box against the band that you want to select. By default All Fields All Bands option is selected for you.
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In the Reproject Options section, you will see the projection of the opened raster grid in the Current Projection field. Select the destination projection system from the Category and the Sub Category drop-down lists.
The Category drop-down list consists of all projection systems supported by MapInfo Professional. For example, Longitude/Latitude, Universal Transverse Mercator (ED 50), Universal Transverse Mercator (NAD 27 for Canada), etc.
The Sub Category drop-down list consists of the type of projection based on the selected projection system.
- Select the desired interpolation method from the Interpolation drop-down list.
- Type the new cell value of the reprojected raster in the New Cell Size field. A cell value range will appear in the Suggested Range field.
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In the Output File box, enter a name for your output file. Click to browse and select the location in your computer to save the output file.
- Click Output Settings to specify the following. The output settings can be controlled by the values set in the Raster Preferences, however, you can overwrite those settings before executing the operation.
- 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.
- Compression Settings - If the file format to be saved is an MRR or TIFF, the compression settings options will appear. You can choose one from Data Balanced, Data Speed, Data Space or Advanced options as required.
- Compression - Select a compression method and level. For more information, see Compression methods.
- Encoding Type - Select a suitable Encoding Type for the data from the list. This drop-down list lets you select the default Encoding Type when saving a raster to MRR format. 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 - Linear estimation of the value from previous two columns.
- Previous Column Value - Predicts the value from previous column.
- Click Output Settings to specify the following. The output settings can be controlled by the values set in the Raster Preferences, however, you can overwrite those settings before executing the operation.
- Click Process to start reprojecting the raster grid based on the projection system.