contouring

Short definition from Wiktionary

Verb

1. 1
   present participle and gerund of contour

Noun

1. 1
   the construction of contour lines through a matrix of points each having a known value of some variable
2. 2
   a technique in makeup using blush and bronzing powder to define contours on the face
3. 3
   the building up of muscles with exercise
4. 4
   walking along contour lines, usually to save energy or simplify navigation