The ASC Arc/Info ASCII filter imports and exports ASC Arc/Info ASCII grid files.
An Esri grid is a raster GIS file format developed by Esri. The ASCII format is also known as Arc/Info ASCII grid. The ASCII format is used as an elevation grid exchange, or export format, with a simple ASCII file structure.
The first six lines of the file indicate the reference of the grid, followed by the values listed in the order they would appear (left to right and top to bottom).
-9999 -9999 5 2
-9999 20 100 36
3 8 35 10
32 42 50 6
88 75 27 9
13 5 1 -9999
ncols are the numbers of rows (represented as integers);
nrows are the numbers of rows (represented as integers);
yllcorner are the western (left) X coordinate and southern (bottom) Y coordinates, such as easting and northing (represented as real numbers with an optional decimal point)
cellsize is the length of one side of a square cell (a real number)
nodata_value is the value that is regarded as "missing" or "not applicable"; this line is optional, but highly recommended as some programs expect this line to be declared (a real number).
The remainder of the file lists the raster values for each cell, starting at the upper-left corner. These real numbers (with optional decimal point, if needed) and are delimited using a single space character.
File Name Extensions
.ASC, .AIG, .AGR, .GRD
Choose the File | Import command.
Select a lattice or image module and choose the File | Save Data command.
ESRII ASCII Grid Format Warning Dialog
When exporting, the ESRII ASCII Grid Format Warning dialog may appear.
The ESRII ASCII Grid Format Warning dialog
Click the Yes button to continue export. Click the No button to abort the export.
File Format Chart
File | Import
File | Save Data