Hunebedden (Dutch dolmens) in proportion

About orientation patterns with hunebedden (in European context)

Measurement of ground plans

Choose a region.
Holland: Drenthe
Germany: Schleswig-Holstein, Niedersachsen, Mecklenburg
France: Ardèche and Gard
Ireland: County Cork
Bulgaria: Rodopi


Drenthe

NB. The phase indication behind a measurement refers to the phasing of the instruments used. See the page The instruments used. The correction of the magnetic declination was obtained from the website of the NOAA [14.1]. Unless specified differently, all phase IV ground plans are of scale 1:100.

D38, D39 and D40 mutual

September 2004, declination correction -½° included, measuring phase II
N 52°48.64’ / E 006°53.29’

Orientation line Measurment to Measurement from Inclination Distance
Van D38 naar D39 193¼° 13½° +1° 28½ mtr
Van D38 naar D40 139½° 320;° +½° 66¼ mtr
Van D39 naar D40 115¼° 295¾° -½° 55 mtr

Angle Measurement
In D38 between D39/D40 53¼°
In D39 between D38/D40 102°
In D40 between D38/D39 25°

D23, D24 and D25 mutual

September 2004, declination correction -½° included, measuring phase II
N 52°56.67’ / E 006°48.18’

Orientation line Measurement to Measurement from Inclination Distance
From D23 to D24 209° 29½° -2° 23 mtr
From D23 to D25 144¼° 324° -1¼° 46½ mtr
From D24 to D25 114° 294° +¼° 42 mtr

Angle Measurement
In D23 between D24/D25 64¾°
In D24 between D23/D25 84¾¾°
In D25 between D23/D24 30°

Bronneger D21

April 2007, declination correction 0° included, measuring phase III
N 52°56.65’ / E 006°48.01’

In the figure below the shapes of the stones are taken from the excavation plans of van Giffen.

Bronneger D22

April 2007, declination correction 0° included, measuring phase III
N 52°25.00’ / E 006°48.03’

The plan is taken from the atlas of van Giffen [14.2]. The red spots on it correspond to the measurement points in the photo series below. Along these points the alignment at D21 and the orientation were verified. Since hunebed D22 lies hidden in the ground partly, measurement point E could not be found via the side stones. By stretching a rope the position of this point has been derived from the excavation plan. In the figure below the rope is drawn as a blue line.

Schipborg D7

August 2010, declination correction ½° included, measuring phase IV
N 53°03.66’ / E 006°41.07’

Emmen D38

September 2010, declination correction ½° included, measuring phase IV
N 52°48.67’ / E 006°53.25’


Emmen D40

April 2011, declination correction ½° included, measuring phase IV
N 52°48.66’ / E 006°53.24’

Emmen D39

May 2011, declination correction ½° included, measuring phase IV
N 52°48.67’ / E 006°53.25’

Due to a bug in the program the data has perished partly. On the basis of existing ground plans an estimation is made, which is drawn in red.

Bronneger D25

June 2011, declination correction ½° included, measuring phase IV
N 52°56.67’ / E 006°48.18’

Hunebed D25 stands on slightly sloping ground towards south (the Hunze valley). Both middle trilithons give the impression of being subsided in that direction. Since the current situation differs rather much from the field plan by van Giffen [14.3], maybe this has happend after 1918. In general the field plans by van Giffen occur to be a little too neatly, but here the differences seem too big for this. Both outer trilithons evaded from subsiding, since the cap stones rest on the end stones also. The ground plan at left renders the measured situation, at right an estimation of the initial situation is made.

Drouwenerveld D26

August 2011, declination correction ½° included, measuring phase IV
N 52°56.56’ / E 006°46.42’

As a result of the findings with D25 (see the page Orientation grid), for D26 a ground plan is made of the eastern half of the hunebed only. Because of the conditions of the field (tall grasses that blocked the laser beam) another strategy was chosen partly: Pictures have been taken of some stones perpendicularly, after which the measurement points (stickers) were connected (red lines in the figure below) and combined with the measurements.