The measurements are taken from the main direction of the passage
mounds,
which means: take the points half of the width of the eastern and
western
ends of the chamber and determine the line between these two. Measure
from
both sides the azimuth and calculate the average of the two.
The error (one sigma) is in the order of 1o, and thus the
azimuth was rounded to the nearest 5'.
The difference between azimuth direction of the north and the south
wall is between 1.5o to -8o (Giffen [1927], page 145). It has been tried to
related this to successive moonrises, but this gives azimuth difference
of max. 15° at any lunar phase. So there seems to be no relation.
In the below table measurements taken by Reijs, V.M.M., Bom, F., Giffen, A.E. and González-García, A. Costa-Ferrer, L. are compared. The numbering scheme is by E.A. van Giffen.
Place | Municipal | Lat. | Long. | Azi o | Azi o |
|
|
|
---|---|---|---|---|---|---|---|---|
Mound # | and/or name | o | o | Reijs, V.M.M. | Bom, F. | Giffen, A.E. van | González-García Costa-Ferrer | |
D1 | Steenbergen | Roden | 53o6' | 6o25' | 262o30' | 269 | 262 | 259 |
D2 | Westervelde | Norg | 53o4' | 6o27' | 264 | 265 | 262o30' | 264 |
D3 | Midlaren | Zuidlaren | 53o7' | 6o40' | 278 | 272 | 273°30' | 279 |
D4 | Midlaren | Zuidlaren | 53o7' | 6o40' | 271 | 268 | 268°30' | 270 |
D5 | Zeijen | Vries | 54o3' | 6o32' | 288 | 289 | 289 | 286 |
D6 | Tynaarlo | Vries | 53o5' | 6o38' | 304 | 300 | 309°30' | 301 |
D7 | Schipborg | Anloo | 53o4' | 6o41' | 264o30' | 267 | 263o30' | 261 |
D8 | Kniphorst | Anloo | 53o4' | 6o42' | 253 | 252 | 251°30' | 253 |
D9 | Noordloo | Anloo | 53o4' | 6o43' | 272 | 272 | 272°30' | 265 |
D10 | Gasteren | Anloo | 53o2' | 6o39' | 284 | 280 | 281 | 284 |
D11 | Anloo | Anloo | 53o1' | 6o42' | 295o45' | 293 | 293 | 292 |
D12 | Eexteresch | Anloo | 53o1' | 6o43' | 325o15' | 335 | 335°30' | 326 |
D13 | Eext | Anloo | 53o1' | 6o44' | 250o45' | 245 | 244°30' | 249 |
D14 | Gieten | Anloo | 53o2' | 6o43' | 279o45' | 276 | 276°30' | 279 |
D15 | Loon | Assen | 53o1' | 6o37' | 293o45' | 291 | 290°30' | 292 |
D16 | Balloo | Rolde | 53o0' | 6o37' | 266o45' | 267 | 263°30' | 262 |
D17 | Rolde | Rolde | 52o59' | 6o39' | 265o45' | 266 | 262°30' | 267+ |
D18 | Rolde | Rolde | 52o59' | 6o39' | 287o45' | 285 | 285°30' | 288+ |
D19 | Drouwen | Borger | 52o57' | 6o47' | 299o15' | 297 | 296°30' | 299 |
D20 | Drouwen | Borger | 52o57' | 6o47' | 277o15' | 276 | 275°30' | 276 |
D21 | De tweeling van de Bronneger | Borger | 52o57' | 6o48' | 220o45' | 219 | 218°30' | 226 |
D22 | De tweeling van de Bronneger | Borger | 52o57' | 6o48' | * | 247 | 246°30' | 253°30' |
D23 | De drieling van de Bronneger | Borger | 52o57' | 6o48' | 252o45' | 257 | 256°30' | 275°30'+ |
D24 | De drieling van de Bronneger | Borger | 52o57' | 6o48' | * | 248 | 247°30' | 269°30'+ |
D25 | De drieling van de Bronneger | Borger | 52o57' | 6o48' | 274o45' | 270 | 271 | 252°30'+ |
D26 | Drouwenerveld | Borger | 52o57' | 6o46' | 247o45' | 246 | 246 | 246 |
D27 | Het grote van Borger | Borger | 52o56' | 6o48' | 288o15' | 284 | 284 | 289°30' |
D28 | Buinen | Borger | 52o56' | 6o49' | 282o15' | 283 | 279°30' | 279 |
D29 | Buinen | Borger | 52o56' | 6o49' | 255o15' | 256 | 253 | 251 |
D30 | Exloo-noord | Odoorn | 52o54' | 6o51' | 348o55' | 347 | 347 | 350°30' |
D31 | Exloo-zuid | Odoorn | 52o52' | 6o52' | ** | 288 | ~290°30' | 299 |
D32 | Odoorn | Odoorn | 52o52' | 6o50' | 251o25' | 250 | 249 | 248 |
D34 | Valtherveld | Odoorn | 52o50' | 6o52' | 320o25' | 318 | 317°30' | 318°30' |
D35 | Valtherbos | Odoorn | 52o50' | 6o52' | 273o25' | 270 | 271 | 269°30' |
D36 | Valthe | Odoorn | 52o50' | 6o54' | 288o55' | 283 | 282°30' | 284°30' |
D37 | Valthe | Odoorn | 52o50' | 6o54' | 285o25' | 280 | 280 | 279 |
D38 | Emmerveld | Emmen | 52o49' | 6o53' | 227o15' | 224 | 223°30' | 224 |
D39 | Emmerveld | Emmen | 52o49' | 6o53' | 204o45' | 205 | 205 | 205 |
D40 | Emmerveld | Emmen | 52o49' | 6o53' | 174o15' | 193*** | 340°30' | 343°30' |
D41 | Emmer-noord | Emmen | 52o48' | 6o53' | 258o15' | 252 | 252 | 252°30' |
D42 | Westenesch-noord | Emmen | 52o48' | 6o52' | 311o15' | 305 | 306°30' | 309°30' |
D43 | Schimmeresch | Emmen | 52o47' | 6o52' | 199o15' | 195 | 195 | 197°30' |
D44 | Westenesch | Emmen | 52o47' | 6o52' | * | 213 | * | * |
D45 | Emmerdennen | Emmen | 52o48' | 6o55' | 262o45' | 258 | 257°30' | 254°30' |
D46 | Angelsloo | Emmen | 52o47' | 6o56' | ** | 276 | 275°30' | 276 |
D47 | Angelsloo | Emmen | 52o47' | 6o56' | 342o15' | 359 | 338°30' | 339°30' |
D48 | Steen van Noord-Barge | Emmen | 52o46' | 6o52' | * | * | * | * |
D49 | Schoonoord/De papeloze kerk | Sleen | 52o49' | 6o45' | 302o15' | 299 | 298°30' | 297 |
D50 | Noord-Sleen | Sleen | 52o47' | 6o48' | 271o15' | 269 | 268 | 267°30' |
D51 | Noord-Sleen | Sleen | 52o47' | 6o48' | 246o45' | 254 | 254 | 252°30' |
D52 | Diever | Diever | 52o52' | 6o20' | 238o55' | 241 | 240°30' | 235 |
D53 | Havelte | Havelte | 52o48' | 6o13' | ** | 253 | 253 | 254 |
D54 | Havelte | Havelte | 52o48' | 6o13' | ** | 290 | 289°30' | 292 |
G1 | Noordlaren | Haren | 53o7' | 6o40' | 303 | 299 | 298°30' | 300 |