GridInQuestIIReprojector

Choose the source coordinate system

Choose the version of the source coordinate system. You have the choice of 2002 or 2015 versions, which only applies to Great Britain, Northern Ireland and the Republic of Ireland.

Choose the destination coordinate system.

Choose the version of the destination coordinate system. You have the choice of 2002 or 2015 versions, which only applies to Great Britain, Northern Ireland and the Republic of Ireland.

Choose an Irish vertical datum from the list. The parameter is for the regions between Northern Ireland and the Republic of Ireland.

The Interpolation Type affects only raster data. Cell values are interpolated in order to change the raster to the specified size.

• Nearest Neighbor is the fastest but produces the poorest image quality.
• Bilinear provides a reasonable balance of speed and quality.
• Bicubic is the slowest but produces the best image quality.
• Average 4 and Average 16 have a performance similar to Bilinear and are useful for numeric rasters such as DEMs.

The Cell Size applies only to raster features.

• Stretch Cells: The cell size of the raster will be adjusted to maintain the same number of rows and columns in the reprojected raster as there were in the input raster.
• Square Cells: The number of rows and columns as well as the spacing will be changed to maintain approximately the same cell ground area and form square cells where the horizontal and vertical cell sizes are equal.
• Preserve Cells: Like the Square Cells option, this option will change both the number of rows and columns and the spacing to maintain cell ground area, but will also try to preserve the original cell aspect ratio, taking into account any warping caused by the reprojection.

Sets the tolerance, in cells, for approximating cell locations for raster reprojection.

If a value of 0.0 is specified, every cell location in the raster will be reprojected. This is the default.

If a value > 0.0 is specified, rather than reprojecting every single cell location in the raster, some cell locations will be approximated. The difference between an approximated cell location and the true cell location should be at most the tolerance value. For example, if a value of 0.5 is specified, each approximated cell location should be at most half a pixel away from its true location. Specifying a value > 0.0 may improve performance.