Export a grid

Export a grid in Eduard

To export a grid to a file do one of the following:

Choose File > Export Grid (at the top of your screen).
Right-click on a shading and choose Export Grid.

Then:

Select the file format from Format.
Click Export to create a new file.

32-bit export

32-bit formats store grid values with high-precision floating-point values.

Esri ASCII Grid : Large human-readable text documents with millimeter precision. The coordinate reference system is exported to a PRJ file.

Esri BIL + HDR : Medium-size documents. The coordinate reference system is exported to a PRJ file.

Esri FLT + HDR : Medium-size documents. The coordinate reference system is exported to a PRJ file.

GeoTIFF – Lossless LZW Compression : Small documents. The coordinate reference system is embedded in the .tif file.

GeoTIFF – No Compression : Medium-size documents. The coordinate reference system is embedded in the TIF file.

Golden Software Surfer 6 : Medium-size documents (encoding with 32-bit values). The coordinate reference system is not exported.

Golden Software Surfer 7 : Medium to large documents (encoding with 64-bit values). The coordinate reference system is not exported.

HFA Erdas : The coordinate reference system is embedded in the HFA file.

XYZ ASCII : Very large text documents with millimeter precision. The X, Y and Z coordinates of each grid cell are exported to an ASCII text file. Void values are indicated with -9999.

The recommended format is GeoTIFF – Lossless LZW Compression if supported by your other software, because it produces small documents and embeds all coordinate reference information.

16-bit export

GeoTIFF – 16-Bit Decimeter Precision : Very small GeoTIFF documents with embedded coordinate reference system. Values are rounded to decimeter precision, which is sufficiently precise for terrain rendering. 16-bit export is available when the difference between the highest elevation and the lowest elevation is less than 6550 meter.

8-bit export to an image file

GeoTIFF 8-Bit Image : A grayscale GeoTIFF image with pixel values between 0 and 255.

GeoTIFF No-Data Mask : A 8-bit GeoTIFF image with a pixel mask encoding void (or no-data) values. This option is only available if the grid contains void values. A no-data mask image can be useful to manipulate void values in a shading with your GIS or raster editing software.

World and PRJ Files

Optional PRJ and world files can be exported with File > Export Coordinate System and File > Export World File .

When an export creates more than one file, all exported files must be kept in the same directory. Names of exported files should not be changed.