reference mark

Except for reference marks on the paper, it was almost entirely blank.

A triangulation station often had two or three reference marks.

He was in the midst of an ocean, turning a wheel, with no reference marks at all.

It required six attempts to get it right, and Russell next used the knife to make reference marks on the van.

Reference marks were set to enable the primary station to be re-established (or re-set) if needed.

Normally, DNA testing is done on the basis of 8 genetic reference marks.

"I assumed they were reference marks," I said.

The graticule is a grid of squares that serve as reference marks for measuring the displayed trace.

The purpose of the microscope is to aim at reference marks with much higher accuracy than is possible using the naked eye.

Reference marks also made it possible to replace (or reset) a station mark that had been disturbed or destroyed.

These reference marks made it easier for later visitors to "recover" (or re-find) the primary ("station") mark.

The machine has reference marks on the center line of the blade for easy alignment to the marks on the materials being joined.

I've been keeping track of our levels of descent and the reference marks on the inside of the shaft, probably put there for the maintenance crews.

Within and below the visible trig point, there are concealed reference marks whose National Grid References are precisely known.

A number of puzzling protuberances on the towers of this gate have been interpreted as everything from builders' reference marks to phallic symbols.

Disks marked with an arrow are called reference marks (RMs), since they point (or "refer") to the principal station that may be located many feet away.

Distance coded reference marks (DCRM)

Cameras outfitted with reseau plates produce these reference marks (also called reseau crosses) and are commonly used by NASA.

A triangulation station was often surrounded by several (usually three) reference marks(see second photo at left), each of which bore an arrow that pointed back towards the main station.

For example, some schooling species have "schooling marks" on their sides, such as visually prominent stripes which provide reference marks and help adjacent fish judge their relative positions.

Technically, the term "bench mark" is only used to refer to survey markers that designate a certain elevation, but hobbyists often use the term benchmarks to include triangulation stations or reference marks.

Indeed, the absence of common reference marks is part of the point: part of Mr. Babbitt's essentially American sense of himself as an artist who must find a new alternative to the techniques of Europe.

In order for the CG wolves to be in sync with the live action cameras and actors' movements, the team used match movers, a land surveying tool that recorded the shooting location's topography with reference marks.

Distance coded reference marks (DCRM) are placed onto the scale in a unique pattern allowing a minimal movement (typically moving past two reference marks) to define the readhead's position.

Also, schooling species often have "schooling marks" on their shoulders or the base of their tails, or visually prominent stripes, which provide reference marks when schooling, similar in function to passive markers in artificial motion capture.