Field Definitions for Land Surveyors

field-1A column in a database table. Generally, each field contains a single, specific class of information. 2 In modeling, a method used to represent continuous (as opposed to discrete) data. Discrete data are modeled using the “object” method.

field, geomagnetic—The magnetic field of the Earth. The magnetic force is vertical at the northern and southern magnetic poles; elsewhere, its direction varies considerably.

field check—Verification of a map compilation on the ground.

field completion—A combination of field inspections or surveys, either before or after compilation, to classify and complete the map content, correct erroneous data, and add information such as names, civil boundaries, and similar classification data. Field completion confirms that portion of a map manuscript prepared by stereocompilation.

field correction—An adjustment made to field measurements, such as angles or distances, to correct for geometric or length discrepancies.

field elevation—See elevation, field.

field inspection [PHOTOGRAMMETRY]—The process of comparing aerial photographs with conditions as they exist on the ground and of obtaining information to supplement or clarify that which is not readily discernible on the photographs themselves.

field notes—A permanent detailed record made by surveyors while establishing a boundary. Actually, a kind of diary in which the surveyor records all of the details about a survey.

field of view—The width of the largest object that can be sighted in relation to the distance from the instrument. Usually expressed in angular units in surveying instruments.

field of view, angular—The angle of view of the outside world, as limited by the field-stop diameter of the sensor. Also called “true field of view,” “real field of view.”

field position—See position, field.

Source: NSPS “Definitions of Surveying and Related Terms“, used with permission.

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