If raw results are output, each of the category values assigned to cells falling along the transect are output. Median and average results output a single value per transect: average outputs the average category value of all cells along the transect; median outputs the median category value of these cells.
The azimuth is an angle, in degrees, measured to the east of north. The distance is in map units (meters for a metered database, like UTM).
Wider transects can be specified by setting the width to 3, 5, 7, etc. The transects are then formed as rectangles 3, 5, 7, etc., cells wide.
The following examples use the elevation.dem raster map layer in the spearfish sample data set distributed with GRASS 4.0. (To reproduce these examples, first set the geographic region as shown:
4 1540 1551 1557 1550
22 1556 1538 1525 1570 1555 1540 1528 1578 1565
1551 1536 1523 1569 1557 1546 1533 1559 1550 1542
1552 1543 1548
(Output appears as multiple lines here, but is really one line)
22 1548.363636
22 1549.000000