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Eng ID Term Definition
4101
projection: stereographic polar
See PROJECTION: STE­REOGRAPHIC.
4102
projection: transverse cylindrical orthomorphic
See PROJECTION: TRANSVERSE MERCATOR.
4103
projection: transverse Mercator
A PROJECTION of the cylindrical type, being in principle equivalent to the regular MERCATOR PROJEC­TION turned (transversed) 90° in AZIMUTH.... more
A PROJECTION of the cylindrical type, being in principle equivalent to the regular MERCATOR PROJEC­TION turned (transversed) 90° in AZIMUTH. In this PROJEC­TION, the CENTRAL MERIDIAN is represented by a straight line, corresponding to the line which represents the EQUATOR on the regular MERCA­TOR PROJECTION. Neither the GEOGRAPHICAL MERIDI­ANS, except the CENTRAL MERIDIAN, nor the GEODETIC PARAL­LELS, except the EQUATOR (if shown), are repre­sented by straight lines. It is a CONFORMAL PROJEC­TION. Also called transverse cylindrical orthomorphic projection.
4104
projection: Universal Transverse Mercator
See GRID: UNIVERSAL TRANSVERSE MERCATOR (UTM).
4105
projection: zenithal
See PROJECTION: AZIMUTHAL.
4106
projector
An optical instrument which throws the IMAGE of a NEGATIVE or PRINT upon a SCREEN or other viewing surface, usually at a larger scale. An un... more
An optical instrument which throws the IMAGE of a NEGATIVE or PRINT upon a SCREEN or other viewing surface, usually at a larger scale. An underwater acoustic TRANSMITTER. See UNDERWATER SOUND PROJECTOR.
4107
projector: reflecting
In PHOTOGRAMMETRY, an instrument by means of which the IMAGE of an AERIAL PHOTOGRAPH can be projected onto a MAP. By varying the position of... more
In PHOTOGRAMMETRY, an instrument by means of which the IMAGE of an AERIAL PHOTOGRAPH can be projected onto a MAP. By varying the position of the projector lens, the scale of the projected IMAGE can be varied, and, by tilting the table top, compensation can be made for any tilt in the PHOTO­GRAPH.
4108
prolate spheroid
See SPHEROID.
4109
prominent object
Objects which are easily identifia­ble, but do not justify being classed as conspicuous.
4110
promontory
A high point of LAND extending into a body of water. A CAPE.
4111
proof
In CARTOGRAPHY, an advanced copy of a MAP produ­ced to check the design, register and/or to enable ERRORS to be detected and corrected befor... more
In CARTOGRAPHY, an advanced copy of a MAP produ­ced to check the design, register and/or to enable ERRORS to be detected and corrected before final prin­ting.
4112
proof plotting
An advanced copy of a map or chart produced by a PLOTTER to check the design and registration, and to detect and correct errors before final... more
An advanced copy of a map or chart produced by a PLOTTER to check the design and registration, and to detect and correct errors before final printing.
4113
propagated error
An error which occurs in one operati­on and contaminates subsequent operations.
4114
properties of sea water
See SEA WATER, SALINITY.
4115
proportional dividers
An instrument consisting in its simple form of two legs pointed at both ends and provi­ded with an adjustable PIVOT, so that for any given p... more
An instrument consisting in its simple form of two legs pointed at both ends and provi­ded with an adjustable PIVOT, so that for any given pivot setting, the distance between one set of pointed ends always bears the same ratio to the di­stance bet­ween the other set. A change in the PIVOT changes the ratio. The dividers are used in transfer­ring measure­ments between CHARTS or other drawings which are not at the same SCALE.
4116
protected reversing thermometer
See THER­MOMETER.
4117
proton precession magnetometer
See MAGNETOMETER: NUCLEAR PRECESSION.
4118
protractor
An instrument for measuring angles on a surface; an angular SCALE. In its most usual form it consists of a circle or part of one (usually a ... more
An instrument for measuring angles on a surface; an angular SCALE. In its most usual form it consists of a circle or part of one (usually a semi­circle) graduated in DEGREES. See PROTRACTOR: THREE ARM and COMPASS ROSE.
4119
protractor: Cust
Square or rectangular sheet of trans­parent xylonite engraved with a circle graduated in DEGREES and half DEGREES. Observed angles are drawn... more
Square or rectangular sheet of trans­parent xylonite engraved with a circle graduated in DEGREES and half DEGREES. Observed angles are drawn, in general, on the under side. See PROTRACTOR: THREE ARM.
4120
protractor: parallel motion
An instrument consisting essentially of a PROTRACTOR and one or more arms attached to a parallel motion device, so that the movement of the ... more
An instrument consisting essentially of a PROTRACTOR and one or more arms attached to a parallel motion device, so that the movement of the arms is everywhere parallel. The protractor can be rotated and set at any position so that it can be oriented to a CHART. Also called univer­sal drafting machine.