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- Graphometer abstract "The graphometer or semicircle is a surveying instrument used for angle measurements. It consists of a semicircular limb divided into 180 degrees and sometimes subdivided into minutes. The limb is subtended by the diameter with two sights at its ends. In the middle of the diameter a "box and needle" (a compass) is fixed. On the same middle the alidade with two other sights is fitted. The device is mounted on a staff via a ball and socket joint. In effect the device is a half-circumferentor. For convenience, sometimes another half-circle from 180 to 360 degrees may be graduated in another line on the limb. The form was introduced in Philippe Danfrie's, Déclaration de l’usage du graphomètre (Paris, 1597) and the term "graphometer" was popular with French geodesists. The preferable English-language terms were semicircle or semicircumferentors. Some 19th-century graphometers had telescopic rather than open sights.".
- Graphometer thumbnail Butterfield_graphometer_img_2601.jpg?width=300.
- Graphometer wikiPageID "14684531".
- Graphometer wikiPageRevisionID "599898257".
- Graphometer hasPhotoCollection Graphometer.
- Graphometer subject Category:Measuring_instruments.
- Graphometer subject Category:Surveying_instruments.
- Graphometer type Artifact100021939.
- Graphometer type Device103183080.
- Graphometer type Instrument103574816.
- Graphometer type Instrumentality103575240.
- Graphometer type MeasuringInstrument103733925.
- Graphometer type MeasuringInstruments.
- Graphometer type Object100002684.
- Graphometer type PhysicalEntity100001930.
- Graphometer type SurveyingInstrument104365484.
- Graphometer type SurveyingInstruments.
- Graphometer type Whole100003553.
- Graphometer comment "The graphometer or semicircle is a surveying instrument used for angle measurements. It consists of a semicircular limb divided into 180 degrees and sometimes subdivided into minutes. The limb is subtended by the diameter with two sights at its ends. In the middle of the diameter a "box and needle" (a compass) is fixed. On the same middle the alidade with two other sights is fitted. The device is mounted on a staff via a ball and socket joint. In effect the device is a half-circumferentor.".
- Graphometer label "Grafómetro".
- Graphometer label "Grafômetro".
- Graphometer label "Graphometer".
- Graphometer sameAs Grafómetro.
- Graphometer sameAs Grafômetro.
- Graphometer sameAs m.03gt0ys.
- Graphometer sameAs Q3321461.
- Graphometer sameAs Q3321461.
- Graphometer sameAs Graphometer.
- Graphometer wasDerivedFrom Graphometer?oldid=599898257.
- Graphometer depiction Butterfield_graphometer_img_2601.jpg.
- Graphometer isPrimaryTopicOf Graphometer.
