Grid

On the File tab, in the Export group: Select Export | Grid to export a Micromine (.GRD) Grid file to a third-party grid file format.

Input

Double-click in the File box (or click on the Select icon) to select the Micromine (.GRD) Grid file you want to export.

Output

Select a file Type and then enter (double-click in the File box or click on the ellipsis to select) the name of the File that will be generated by the process. You can export to any of the following grid and raster file formats:

File Format

Extension

GXF – Grid eXchange File

gxf

Surpac Minex grid

grid

Arc/Info ASCII Grid

asc

ESRI .hdr Labelled

hdr

ER MAPPER (ERS)

ers

Erdas Imagine Images

-

ASCII Gridded XYZ

-

Intergraph Raster

-

SAGA GIS Binary Grid

sdat

Virtual Raster

vrt

Idrisi Raster A. 1

rst

Golden Software ASCII

grd

Golden Software Binary

grd

Golden Software Surfer 7 Binary Grid

grd

Tagged Image File Format

tif

Convert Coordinates

Select the Convert Coordinates check box to convert between projected or local coordinates and geographic coordinates (latitudes and longitudes) as part of the export process.

Conversion

Select, or create a new, coordinate conversion form set. See: Coordinate System Conversion

Sampling method

Select a sampling method:

Method Input Cells Calculation Properties

Nearest Neighbour

1 (1 × 1)

Returns the nearest cell value
  • Fast but poor-quality interpolation.
  • Preserves the exact values of the input data, for example a geological grid where cell values represent geological units, or the exact value of the nearest sample.

Bilinear

4 (2 × 2)

Combined linear interpolations along the X and Y axes
  • For general purpose interpolation.
  • Very efficient.

Cubic

16 (4 × 4)

Cubic convolution
  • For interpolating continuous surfaces.
  • Produces a smoother result than bilinear interpolation.
  • Large input changes may cause over- or -undershoots.

Cubic Spline

 

Piecewise cubic polynomial
  • Honours the input cell values and avoids over/under shoots.

Lanczos

 

Windowed sine cardinal (Sinc) function
  • Very accurate with smooth data.
  • Better at preserving sharp edges than other methods.
  • May cause dark/light haloes along strong edges.

Null data value

Specify the value that will be stored when null values are returned during the conversion.

Grids to XPAC