Download Die Triangulation von Java Ausgeführt vom Personal des by Dr. J. A. C. Oudemans, E. Metzger, C. Woldringh (auth.) PDF

By Dr. J. A. C. Oudemans, E. Metzger, C. Woldringh (auth.)

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Extra resources for Die Triangulation von Java Ausgeführt vom Personal des Geographischen Dienstes in Niederländisch Ost-Indien: Zweite Abtheilung: Die Basismessung bei Simplak

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Betrachtet man das oben gegebene Schema der Berechnung eines Dekameters, so erkennt man leicht, dass jedesmal der Ausdehnung des Mikt·oskopträgers zwischen der Zeit, welche gegenüber (27) und jener, welche beim folgenden Dekameter gegenüber (9) steht, keine Rechnung getragen ist. Der Zeitraum zwischen diesen beiden Zeiten war, wenn keine Hindernisse eintraten, meistens zwischen 10 und 20 Minuten, während zwischen (9) und dem folgenden (27) durchgängig etwa 10 Minuten verliefen. Zählt man nun für jeden Tag, an welchem gemessen wurde, alle die erstgenannten Zeiträume zusammen, so hat man den ganzen Zeitraum, für welchen die Ausdehnung des Mikroskopträgers 111 noch beachtet werden muss; während die ganze Ausdehnung im Laufe jedes Tages durch Vergleichung der ersten Ablesungen (20) bis (25) und der letzten Ablesungen (14) bis (19) gefunden wird, so dass, wenn man die Ausdehnung der Zeit proportional annimmt, die gewünschte Correction leicht gefunden wird.

Auf gleiche Weise wurde gefunden : Für den zweiten Theil wegen III : ............ 0,291 mM. » IV : ............ 0,469 >> 0, 760 1020 Mikrons )) 219 )) Für den dritten Theil 0,519 mM. 0,554 )) 1,075 )) )) ZWEITE MESSUNG. Erster Theil B bis H, Wegen III: ........... 0,596 mM. IV:. . . .... 0,646 » ,, hierbei ~~ 1,242 0,266 )) 1,508 )) Zweiter Theil, 0,295 mM. 0,275 )) 0,568 Dritter Theil, 0,576 mM. 0,520 )) )) )) 1,096 » Die Correction für die drei Theile der Basis zusammen ist also für die erste Messung.

Wie aus dem Profil des Basisterrains, Fig. 51, Tafel V leicht abgeleitet wird,* können für die Höhe der drei Theile der Basis über die Oberfläche des Meeres respective angenommen werden: * Die in Fig. 51 untergeschriebenen Zahlen bedeuten die Höhen der entsprechenden Stellen der Basis über der Oberfläche des Meeres, indem für die Höhe der ersten Stufe der Treppe an der Nordseite des Palastes zu Buitenzorg nach einem früher von Herrn Metzger selbst ausgeführten Nivellement 266,78 Meter angenommen wurde.

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