Aliasing
Amplitude distortion
Attenuation distortion
Bias distortion
Crossover distortion
Degree of isochronous distortion
Degree of start-stop distortion
Delay distortion
Distortion-limited operation
Distortion (guitar) ...
While modern computers can eliminate this problem using anti-aliasing, earlier computer graphics did not support enough colors or possess enough CPU power to accomplish this.
Use anti-aliasing. Aliasing is the undesirable effect produced when graphics and type are displayed on a monitor at a low resolution.
Usually you solve this problem by re-aliasing one (or both) of the resulting fields.
In this case, the modulated signal is under-sampled to achieve frequency translation via intentional aliasing. Again, if the GPS L1 signal is taken as an example with assuming 1 quantization bit per sample, this leads to die following values: ...
This "proportional aliasing" provides a way of locating objects on river reaches which is somewhat independent of the scale of the map used to define the river reach spatially.
turn off your original image layer and any other layer that sticks out beyond the site extent, and export an image. The tutrorial dataset has an example -- groundcover.tif.
To avoid having halos around your shapes, be sure to uncheck anti-aliasing ...
 See also: Alias, Information, Object, Image, Origin
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