The Reproject tool changes the projection of a raster dataset from one projection system to another. To reproject a raster you need to specify the following.
- New projection system
- Select one of the three interpolation methods
- New cell size
When you reproject an input raster to another projection system, a .TAB file, a new raster file, and a new .ghx file is created. The new files contain information about the new coordinate system and cell size. When reprojecting, you can choose any one of the following interpolation methods.
You can also use this operation in batch processing mode.
Supported Resampling Methods.
- Nearest Neighbor - In this method, the cell value of the resampled raster dataset is determined by taking the value of nearest input cell. This method is useful when you reproject a raster dataset and you want to retain the original cell values. You can use Nearest Neighbor resampling for raster maps, grids, and scanned maps to get faster results. Nearest Neighbor is used for discrete data, such as a land-use classification.
- Bilinear - In this method, the cell value of the resampled raster dataset is calculated based on the value of the linear distance-weighted average of 4 surrounding cells of the input raster.
- Bi-cubic - In this method, the cell value of the resampled raster dataset is calculated based on the weighted value 16 surrounding cells of the input raster. This method requires more processing time but gives more accurate result than bilinear interpolation. This method is useful when you want to reduce aliasing and blurring of raster images.
In MapInfo Pro Advanced, you can resample classified and numeric rasters. If the source raster is of classified type, you can produce a resampled output in MRR or classified formats. For example, if source raster is of type Vertical Mapper GRC, then the available output types are MRR and GRC. Imagery type rasters are also supported.
You can also use this operation in batch processing mode.
Support for MapInfo Virtual Raster
A MapInfo virtual raster is a raster that can be loaded, displayed, and operated upon in MapInfo Pro just like any other raster format. The raster data is acquired or generated on-demand, at run time. The MapInfo Virtual Raster (MVR) is a simple XML file using the .MVR file extension that you can load in MapInfo Pro. As a result, this operation is fast, and you get a preview without generating an actual output Raster file. You see the results instantaneously on a mapper. This option is also available in the Batch mode.
- Output - Compression Settings - This option is not applicable and hence hidden in case of an MVR output.