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Eng ID | Term | Definition |
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3661 | overfalls | Short, breaking WAVES occurring when a strong CURRENT passes over a SHOAL or other submarine OBSTRUCTION or meets a contrary CURRENT or WIN... more |
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3662 | overlap | In CARTOGRAPHY and SURVEYING, the amount by which one CHART or SURVEY SHEET extends also over an adjoining CHART or sheet. The amount by whi... more |
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3663 | overlapping pair | In PHOTOGRAMMETRY, two PHOTOGRAPHS taken at different exposure stations in such a manner that a portion of one PHOTOGRAPH shows the same te... more |
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3664 | overlay | In mapping, a record on a transparent medium to be superimposed on another record. |
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3665 | overlay tracing | A plotting on TRACING CLOTH at the SCALE of the smooth sheet used in conjunction with the smooth sheet. See FAIR CHART. |
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3666 | overprint | In CARTOGRAPHY, an additional PLATE, generally in a distinctive colour, printed down on a MAP or CHART which is already complete in itself... more |
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3667 | overtide | A shallow water harmonic tide constituent with a SPEED that is a multiple of the SPEED of one of the basic constituents of the TIDE-PRODUCIN... more |
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3668 | ozalid print | See PRINT: OZALID. |
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3669 | pack ice | Term used in a wide sense to include any area of SEA ICE, other than FAST ICE, no matter what form it takes or how it is disposed. Pack ice ... more |
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3670 | pair of compasses | See COMPASS. |
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3671 | paleomagnetism | Remanent MAGNETISM produced by the EARTH's field when a material was initially formed. |
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3672 | Pan American Institute of Geography and History (PAIGH) | Develops, coordinates, and disseminates geographical, cartographic, historical, geophysical and related scientific studies. |
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3673 | pancake ice | Pieces of NEW ICE, usually approximately circular, about 30 cm to 3 m across, and with raised rims, due to the pieces striking against each ... more |
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3674 | panchromatic | (adj.). Sensitive to light of all colours, as a film or plate emulsion. |
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3675 | panel | In cartography, the completed assembly of pieces of film positives onto a grid or projection which is used as a base for compilation. In pho... more |
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3676 | pantograph | An instrument for copying a CHART, drawing, etc., to any desired SCALE within the limits of the instrument. |
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3677 | paper | For printing hydrographic charts, heavyweight, single layer paper is used. Such paper is generally made wholly or partly from rags and simul... more |
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3678 | parabola | An open curve all points of which are equidistant from a fixed point, called the focus, and a straight line. |
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3679 | parachute drogue | See DROGUE. |
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3680 | parallactic angle | That angle of the ASTRONOMICAL TRIANGLE at the CELESTIAL BODY; the angle between a body's HOUR CIRCLE and its VERTICAL CIRCLE. Also called p... more |