Refer to the figure.
A graduate student interested in using a habitat map of North America finds that it is too large of a file for his school's Geographic Information System (GIS) computers to handle.
-To reduce the file size, the graduate student changes the pixel size of the file from 30 x 30 m (Panel 1) to 1000 x 1000 m (Panel 3). This student has successfully altered the _______ but in the process has lost _______.
A) extent; detail
B) grain; detail
C) scale; accuracy
D) range; precision

Question

Refer to the figure.
 A graduate student interested in using a habitat map of North America finds that it is too large of a file for his school's Geographic Information System (GIS) computers to handle. 
-To reduce the file size, the graduate student changes the pixel size of the file from 30 x 30 m (Panel 1) to 1000 x 1000 m (Panel 3). This student has successfully altered the _______ but in the process has lost _______.
A) extent; detail 
B) grain; detail 
C) scale; accuracy 
D) range; precision

Quizplus · Accepted Answer

The student changed the "grain" (resolution) of the file, which refers to the size of the smallest unit of measurement (pixel size), and in doing so, lost "detail" because larger pixels capture less detailed information.

Refer to the Figure