Border poles and marke stones

Border poles Gelderland and North Rhine-Westphalia

• pole 630. On May 24, 2022 at 13:00
• pole 630-A.
• pole 630-B.
• pole 630-C. On May 24, 2022 at 12:58
• pole 630-D. On May 24, 2022 at 12:56
• pole 630-E. On May 24, 2022 at 12:55
• pole 631. On May 24, 2022 at 12:52
• pole 631-A.
• pole 631-B. On May 24, 2022 at 13:09
• pole 631-C. On May 24, 2022 at 13:13
• pole 632. On May 24, 2022 at 13:18
• pole 633.
• pole 633-A.
• pole 633-B. On May 24, 2022 at 13:27
• pole 634. On May 24, 2022 at 13:32
• pole 634-A. On May 24, 2022 at 13:35
• pole 635. On May 24, 2022 at 12:32
• pole 636. On May 24, 2022 at 12:34

• pole 659 (N). On May 15, 2022 at 11:08.
• pole 600 (N). On May 15, 2022 at 11:39.

• pole 660 (D). On May 17, 2022 at 13:35.

• pole 663. On May 15, 2022 at 15:15.
• pole 663-D. On May 15, 2022 at 15:01.
• pole 663-E. On May 15, 2022 at 15:03.

Border poles Overijssel and North Rhine-Westphalia

• pole 832 (stone 1). On February 27, 2021 at 8:52.
• pole 832-A (stone 2). On February 27, 2021 at 9:03.
• pole 832-B (stone 3). On February 27, 2021 at 9:15.
• pole 832-C. On February 27, 2021 at 9:25. (we presume, because it only the top of it was above the water).
• pole 832-D. On February 27, 2021 at 9:30.
• pole 832-E (stone 4). On February 27, 2021 at 9:35 from about 3 meters.
• pole 832-F. (In nature reserve)
• pole 832-G (stone 5). (In nature reserve).
• pole 834-H. (In nature reserve)
• pole 832-J (stone 6). (In nature reserve).
• pole 832-K. (In nature reserve)
• pole 833 (stone 7). On February 28, 2021 at 12:33 from about 10 meters.
• pole 833-A. On February 28, 2021 at 11:45.
• pole 833-B (stone 8). On February 28, 2021 at 11:55
• pole 833-C (stone 9). On February 28, 2021 at 13:57.
• pole 833-D. On February 28, 2021 at 13:48
• pole 833-E (stone 10). On February 28, 2021 at 13:40
• pole 834 (stone 11). On February 28, 2021 at 13:30
• pole 834-A. On March 2, 2021 at 16:00
• pole 834-B (stone 12). On March 2, 2021 at 16:03
• pole 834-C (stone 13). On March 2, 2021 at 16:17
• pole 834-D (stone 14). On March 2, 2021 at 16:33
• pole 834-E (stone 15). On March 2, 2021 at 16:41
• pole 834-F. On March 6, 2021 at 15:49
• pole 834-G. On March 6, 2021 at 15:53
• pole 835 (stone 16). On March 6, 2021 at 17:16
• pole 835-A (stone 17). On March 6, 2021 at 16:25
• pole 835-B (stone 18). On March 11, 2021 at 10:17.
• pole 835-C. On March 11, 2021 at 10:12.
• pole 836 (stone 19) has been removed.
• pole 836-A. On March 11, 2021 at 10:28
• pole 836-B. On March 11, 2021 at 10:29
• pole 836-C. not visited, might not be reachable.
• pole 837. On March 11, 2021 at 13:20
• pole 837-A (stone 20). On March 11, 2021 at 13:16
• pole 837-B. On March 11, 2021 at 13:13
• pole 837-C. On March 11, 2021 at 13:11
• pole 837-E (stone 21). On March 11, 2021 at 11:06,
• pole 837-F (stone 21A). On March 11, 2021 at 11:11.
• pole 837-G. On March 11, 2021 at 11:14
• pole 837-H. On March 11, 2021 at 11:20
• pole 837-J (stone 22). On March 11, 2021 at 11:28
• pole 838 (stone 23). On March 11, 2021 at 11:37
• pole 838-A. On March 11, 2021 at 11:50
• pole 838-B (stone 24). On March 11, 2021 at 12:00
• pole 838-C. is not reachable.
• pole 838-D. (Not visited yet)
• pole 839. (Not visited yet)
• pole 839-A. (Not visited yet)
• pole 839-B. On May 21, 2020 at 6:17
• pole 839-C. Removed??
• pole 840 On October 18, 2020 at 15:06.
• pole 840-A. On October 18, 2020 at 15:06
• pole 840-B, also known as "pfeal an der Mesemate". On May 21, 2020 at 6:23
• pole 840-D. (This pole is not mentioned on the map of the markegrenzen.nl website.) On May 21, 2020 at 6:28
• the Wertherpaal. On May 21, 2020 at 6:32
• 840-E. (Not visited yet, difficult to reach)
• 840-F. On November 1, 2020.
• 840-G. On May 21, 2020 at 6:48
• 840-H. On May 21, 2020 at 6:48
• pole 841. Not accessible
• pole 841-B. Not accessible
• pole 841-C. Not accessible
• pole 842. Not accessible
• pole 842-A. Not accessible
• pole 842-D. Not accessible
• pole 842-E. Not accessible
• pole 842-H. Not accessible
• pole 842-J. Not accessible
• 842-K. On May 21, 2020 at 7:13. from a distance while standing on the road called Berenbroeksweg.
• 842-L. On May 21, 2020 at 7:13. from a distance while standing on the road called Berenbroeksweg.
• pole 842-M. Not accessible
• 843. On May 21, 2020 at 7:13. from a distance while standing on the road called Berenbroeksweg.
• pole 843-C. On May 21, 2020 at 7:16 (Not in my planning.)
• pole 843-D. On May 21, 2020 at 7:20 (Not in my planning.)
• pole 844. On May 31, 2020 at 13:34
• pole 844-A. On May 21, 2020 at 7:25 (We missed pole 844, while we walked past it.)
• pole 844-B. Not accessible
• pole 844-C. Not accessible
• pole 844-D. Not accessible
• pole 844-E. Not accessible
• pole 844-F. Not accessible
• pole 844-G. Not accessible
• pole 844-H. Not accessible
• pole 844-J. Not accessible
• pole 844-K. Not accessible
• pole 844-L. Not accessible
• pole 844-M. Not accessible
• pole 844-N. On May 31, 2020 at 13:05
• pole 844-O. Not accessible
• pole 844-P. Not accessible
• pole 845. No accessible
• pole 845-A. Not accessible
• pole 845-B. Not accessible
• pole 845-C. On May 21, 2020 at 8:17
• pole 845-D. (Not seen yet.)
• pole 845-E On May 21, 2020 at 8:32. from a distance because it being in a raised bog.
• pole 845-F. (Not seen yet.)
• pole 845-G. On May 21, 2020 at 8:34
• pole 845-H. On May 21, 2020 at 9:37
• pole 845-J. (We did not find it.)
• pole 845-K. On May 21, 2020 at 9:33
• pole 845-L. On May 31, 2020 at 12:23
• pole 845-M. On May 21, 2020 at 9:29
• pole 845-O. On May 31, 2020 at 12:31
• pole 845-P. (Not seen yet.)
• pole 845-R. (Not seen yet.)
• pole 845-S. On May 31, 2020 at 11:52
• pole 846-T. (We searched for it.)
• pole 845-U. On May 31, 2020 at 11:35
• pole 845-V. On May 31, 2020 at 11:38
• pole 845-W. On May 31, 2020 at 11:31
• pole 845-X. On May 31, 2020 at 11:07
• pole 845-Y. On November 1, 2020 at 11:20.
• pole 846. On May 31, 2020 at 11:14
• pole 846-D. Not accessible
• pole 846-E. Not accessible
• pole 846-F. Not accessible
• pole 846-J (N)On May 31, 2020 at 10:46
• pole 846-J (D). Missing or hidden from view
• pole 847. On May 21, 2020 at 10:12
• pole 848 (N). On May 21, 2020 at 10:22
• pole 848 (D). On May 21, 2020 at 10:22
• pole 849. Not accessible
• pole 849-A. Not accessible
• pole 849-D. Not accessible
• pole 849-E. Not accessible
• pole 849-H. Not accessible
• pole 849-J. Not accessible
• pole 849-K. Not accessible
• pole 849-L. Not accessible
• pole 849-M. On May 31, 2020 at 10:07
• pole 849-N. On May 31, 2020 at 10:05
• pole 850. Not accessible
• pole 850-A. Not accessible
• pole 850-B. Not accessible
• pole 851. On May 31, 2020 at 9:59 we saw it from the Glanergrensweg.
• pole 851-A. Not accessible
• pole 851-B. Not accessible
• pole 851-C. Not accessible
• pole 851-D. Not accessible
• pole 852. Not accessible
• pole 852-A. Not accessible
• pole 853. (We could not locate pole 852) On May 31, 2020 at 9:43
• pole 854. On May 31, 2020 at 9:32
• pole 855. Not accessible
• pole 855-A. Not accessible
• pole 856. Not accessible
• pole 856-A. Not accessible
• pole 856-B. Not accessible
• pole 856-C. On February 20, 2021 at 12:11 only seen from a distance.
• pole 856-D. Not accessible
• pole 856-E. On February 20, 2021 at 11:48
• pole 857. On May 31, 2020 at 7:18
• pole 857-A. On May 31, 2020 at 7:22
• pole 857-B. On February 20, 2021 at 11:56
• pole 857-C. On May 31, 2020 at 7:27
• pole 857-D. On May 31, 2020 at 7:32
• pole 858. On May 31, 2020 at 7:36
• pole 858-A. On May 31, 2020 at 7:40
• pole 859. On May 31, 2020 at 7:44
• pole 859-A. Not accessible
• pole 860. On May 31, 2020 at 7:51
• pole 860-A. On May 31, 2020 at 7:51
• pole 860-B. On May 31, 2020 at 8:09
• pole 861. Not found. Probably not accessible
• pole 861-A. On May 31, 2020 at 7:59
• pole 861-B. On May 31, 2020 at 8:02
• pole 862.1, the Drilandstein. On May 31, 2020 at 8:17

Border poles Overijssel and Lower Saxony

• pole 1-I. (Not visited)
• pole 1-II. (Not visited)
• pole 2. On February 20, 2021 at 12:50
• pole 2-I. On February 20, 2021 at 12:59
• pole 3. On February 20, 2021 at 13:12
• pole 3-I. On February 20, 2021 at 13:21
• pole 3-II. On February 20, 2021 at 13:44
• Pole 4. On March 18, 2021 at 11:39.
• Pole 4-I.
• Pole 4-II.
• Pole 4-III.
• Pole 5.
• Pole 5-I. On March 18, 2021 at 14:31.
• Pole 5-II. On March 18, 2021 at 12:25.
• Pole 5-III. On March 18, 2021 at 12:29.
• Pole 6. On March 18, 2021 at 12:29.
• Pole 6-I. On March 18, 2021 at 14:25
• Pole 6-II.
• Pole 7.
• Pole 7-I.
• Pole 8.
• Pole 9.
• Pole 10.
• Pole 11.On March 18, 2021 at 13:22.
• Pole 11-I. (Not found)
• Pole 11-II. March 21, 2021 at 13:46.
• Pole 11-III. March 21, 2021 at 13:52.
• Pole 12. March 21, 2021 at 13:56.
• Pole 12-I.
• Pole 13.
• Pole 13-I.
• Pole 13-II.
• Pole 14.
• Pole 14-I.
• Pole 15.
• Pole 16.
• Pole 16-I.
• Pole 17. On April 1, 2021 at 14:04
• Pole 17-I. On April 1, 2021 at 14:07
• Pole 17-II. On April 1, 2021 at 14:59
• Pole 18. On April 1, 2021 at 15:04
• Pole 18-IV. (Not really a pole but a plate on the ground.) On June 6, 2021 at 13:43
• Pole 20. On April 1, 2021 at 15:20
• Pole 20-I. (Not found.)
• Pole 20-II. On April 1, 2021 at 15:41
• Pole 20-III. On April 1, 2021 at 15:46
• Pole 20-IV.
• Pole 20-V.
• Pole 21. On June 6, 2021 at 14:14
• Pole 21-I.
• Pole 21-II.
• Pole 21-III.
• Pole 21-IV.
• Pole 21-V.
• Pole 21-VI.
• Pole 21-VII.
• Pole 21-VIII.
• Pole 22.
• Pole 22-I. On June 6, 2021 at 14:46
• Pole 22-II.
• Pole 23.
• Pole 23-I.
• Pole 23-II.
• Pole 24. On June 8, 2021 at 12:02.
• Pole 24-I. On June 8, 2021 at 11:53.
• Pole 24-II. On January 16, 2022 at 14:21.
• Pole 25. On January 16, 2022 at 14:14.
• pole 26. On June 8, 2021 at 12:22.
• pole 26-I. On June 8, 2021 at 13:13.
• pole 26-II. On June 8, 2021 at 12:50.
• pole 26-III. On June 8, 2021 at 12:41.
• pole 26-IV. On September 2, 2021 at 14:32.
• pole 26-V. On January 16, 2022 at 14:48.
• pole 27. On September 2, 2021 at 14:41.
• pole 28. On January 16, 2022 at 14:58.
• pole 29. On September 2, 2021 at 14:50.
• pole 30. On January 16, 2022 at 15:08.
• pole 31. On September 2, 2021 at 15:03.
• pole 31-I. On September 2, 2021 at 15:06.
• pole 31-II. On January 16, 2022 at 15:21.
• pole 31-III. On January 16, 2022 at 15:25.
• pole 31-IV. On September 2, 2021 at 15:20.
• pole 31-V. On September 2, 2021 at 15:33.
• pole 31-VI. On September 2, 2021 at 15:38.
• pole 31-VII. On September 2, 2021 at 15:44.
• pole 32. On January 23, 2022 at 15:04.
• pole 32-I. On January 23, 2022 at 15:12.
• pole 32-II. On January 23, 2022 at 15:16.
• pole 32-III. On January 23, 2022 at 15:19.
• pole 33 (N).
• pole 33 (D).
• pole 33-II.
• pole 34.
• pole 35. (Has been removed)
• pole 36. (Has been removed)
• pole 37.
• pole 38.
• pole 39. On January 23, 2022 at 15:55.
• pole 40. On January 23, 2022 at 15:51.
• pole 41. On January 23, 2022 at 15:48.
• pole 41-I. On January 23, 2022 at 15:45.
• pole 41-II. On January 23, 2022 at 15:45.
• pole 41-III. On January 23, 2022 at 15:44.
• pole 42. On January 23, 2022 at 15:42.
• pole 43 (N). On January 23, 2022 at 15:39.
• pole 43 (D). On January 23, 2022 at 15:39.
• pole 44 (N). On January 23, 2022 at 16:15.
• pole 44 (D). On January 23, 2022 at 16:14.
• pole 45 (N).
• pole 45 (D).
• pole 46 (N). On January 30, 2022 at 14:46
• pole 46 (D). On January 30, 2022 at 14:48.
• pole 47. On January 30, 2022 at 14:37.
• pole 48 (N).
• pole 48 (D).
• pole 48-I.
• pole 49.
• pole 49-I.
• pole 49-II.
• pole 50.
• pole 51. On April 27, 2022 at 15:41
• pole 51-I. On April 27, 2022 at 15:51
• pole 51-II. On April 27, 2022 at 15:58
• pole 52. On April 27, 2022 at 16:05
• pole 52-I. On April 27, 2022 at 16.20 (probably)
• pole 53. On April 27, 2022 at 16:43
• pole 53-I.
• pole 54.
• pole 54-I.
• pole 55.
• pole 55-I.
• pole 55-II.
• pole 56.
• pole 56-I.
• pole 56-II.
• pole 57.
• pole 58.
• pole 59.
• pole 60. On January 2, 2021 at 10:22
• pole 61. On January 2, 2021 at 10:40
• pole 62. On January 2, 2021 at 10:26
• pole 62-I. On January 2, 2021 at 10:26
• pole 62-II. On January 2, 2021 at 10:26

• pole 83. On December 31, 2020 at 11:55
• pole 84. On December 31, 2020 at 12:35
• pole 84-I. On December 31, 2020 at 12:59
• pole 85. On December 31, 2020 at 12:52
• pole 85-I. On January 1, 2021 at 14:08
• pole 85-II. On January 1, 2021 at 14:12
• pole 86. On January 1, 2021 at 13:55
• pole 86-I. On January 1, 2021 at 14:39
• pole 86-III. On December 30, 2020 at 15:40
• pole 87. On December 30, 2020 at 16:08
• pole 87-I. On December 30, 2020 at 16:17
• pole 87-II. On December 30, 2020 at 16:25
• pole 88-I. On January 2, 2021 at 9:48

• pole 92-I. On January 2, 2021 at 9:30

• pole 132-I (N). On September 26, 2020 at 11:36
• pole 132-I (D). On September 26, 2020 at 11:36

Border poles Drenthe and Lower Saxony

• pole 133. On September 12, 2020 at 11:29 (52°37'40.303"N 6°42'36.152"E)
• pole 133-I. On September 12, 2020 at 11:32 (52°37'41.347"N 6°42'39.742"E)
• pole 133-II. On March 28, 2021 at 13:10 (52°37'44.869"N 6°42'47.757"E) Almost submerged.
• pole 133-III. (Not found yet) (52°37'47.23"N 6°42'50.778"E)
• pole 134. On March 28, 2021 at 13:19 (52°37'48.499"N 6°42'53.628"E)
• pole 134-I. On September 12, 2020 at 12:00 (52°37'49.348"N 6°42'56.35"E)
• pole 134-II. On September 12, 2020 at 13:10 (52°37'52.828"N 6°43'5.821"E)
• pole 135. On September 12, 2020 at 12:23 (52°37'53.207"N 6°43'14.934"E)
• pole 135-I. On March 28, 2021 at 13:36 (52°37'53.814"N 6°43'16.061"E) Plate says 135 with carved I
• pole 135-II. On March 28, 2021 at 13:39 (52°37'56.255"N 6°43'23.937"E)
• pole 135-III. On March 28, 2021 at 13:44 (52°37'59.475"N 6°43'34.767"E)
• pole 136. On March 28, 2021 at 13:45 (52°38'1.035"N 6°43'36.467"E)
• pole 137. On September 12, 2020 at 12:49
• pole 137-I. On September 12, 2020 at 12:52
• pole 138. On September 26, 2020 at 12:17
• pole 138-I. On September 26, 2020 at 12:06
• pole 139. Not accessible (52°38'27.049"N 6°44'10.481"E)
• pole 139-I. Not accessible (52°38'27.446"N 6°44'11.438"E)
• pole 139-II. Not accessible (52°38'36.047"N 6°44'22.389"E)
• pole 139-III. Not accessible (52°38'40.283" 6°44'27.65")
• pole 140. On September 12, 2020 at 14:17 (52°38'43.2"N 6°44'31.149"E)
• pole 141. On September 12, 2020 at 14:03 (52°38'46.406"N 6°44'45.89"E)
• pole 142 (N). On September 12, 2020 at 13:58.
• pole 142 (D). On September 12, 2020 at 14:28
• pole 143. Gone.
• pole 144. On September 12, 2020 at 14:31 (and metal circle on the bike path with the text: "grenz punkt" (German for border point)
• pole 145 (N). (Not found yet) (52°38'44.997"N 6°45'12.464"E). On March 28, 2021: It seems it has been removed.
• pole 145 (D). (Not found yet). On March 28, 2021: It seems it has been removed.
• pole 145-I. (Not found yet) (52°38'45.417"N 6°45'13.871"E). On March 28, 2021: It seems it has been removed.
• pole 145-II. On September 12, 2020 at 14:46 (52°38'46.833"N 6°45'16.364"E). On March 28, 2021: It seems it has been removed.
• pole 145-III. On September 12, 2020 at 14:49 (52°38'48.444"N 6°45'17.575"E). On March 28, 2021: It seems it has been removed.
• pole 146. On September 12, 2020 at 14:50 (52°38'49.402"N 6°45'19.98"E)
• pole 147. On September 12, 2020 at 14:51, which no longer stands at the original point, which lies on the road. (On the map now named 147-I at 52°38'50.232"N 6°45'20.091"E)
• pole 147-II (N). On September 26, 2020 at 12:50
• pole 147-II (D). On September 26, 2020 at 12:50
• pole 148 (N). On September 26, 2020 at 13:09
• pole 148 (D). On March 28, 2021 at 15:22 laying in a ditch.
• pole 148-I. On September 26, 2020 at 13:23
• pole 149 (N). On September 26, 2020 at 13:34
• pole 149 (D). On September 26, 2020 at 13:34
• pole 150-I. On September 26, 2020 at 13:40
• pole 151. On September 26, 2020 at 13:54
• pole 151-I. On September 26, 2020 at 13:56
• pole 151-II. On September 26, 2020 at 13:57
• pole 151-III. On September 26, 2020 at 14:10
• pole 151-V (N), which had fell sideways. On January 23, 2021 at 13:27
• pole 151-V (D). On January 23, 2021 at 13:31
• pole 151-VI (N), which had fell sideways. On January 23, 2021 at 14:07 (52°39'2.98"N 6°47'37.7"E)
• pole 151-VI (D). Not found (52°39'2.33"N 6°47'37.15"E)
• pole 152 (N). On January 23, 2021 at 14:30 (52°39'3.371"N 6°49'49.657"E)
• pole 152 (D). On February 21, 2021 at 12:41 (52°39'2.961"N 6°49'50.348"E)
• pole 152-I (N). Not found (52°39'0.62"N 6°50'42.969"E)
• pole 152-I (D). On March 28, 2021 at 16:25. (52°39'0.123"N 6°50'42.596"E) Almost submerged.
• shield 152-II on the bridge. On January 23, 2021 at 14:55
• shield 152-III on the bridge. On January 23, 2021 at 14:57
• pole 153 (D). On January 23, 2021 at 14:59 (52°39'12.11"N 6°52'23.462"E)
• pole 153 (N), which had fell backwards. On January 23, 2021 at 15:02 (52°39'11.336"N 6°52'23.245"E)
• pole 153-I (N). On January 23, 2021 at 15:18 (52°39'4.013"N 6°53'9.875"E)
• pole 153-I (D). On January 23, 2021 at 15:19 (52°39'3.353"N 6°53'10.038"E)
• pole 154 (N). On January 23, 2021 at 15:25
• pole 154 (D). On January 23, 2021 at 15:27
• pole 155 (N). On January 23, 2021 at 15:59
• pole 155 (D). On January 23, 2021 at 16:03
• pole 156 (N). On February 21, 2021 at 14:14 (52°37'58.09"N 7°2'30.63"E)
• pole 156 (D). looks like has disappeared.
• pole 156-II (N), On February 21, 2021 at 14:09 the remains of .
• pole 156-II (D). On February 21, 2021 at 14:23
• pole 156-III (D). On February 21, 2021 at 14:37,
• pole 157 (N). On February 21, 2021 at 13:28,
• pole 157 (D). On February 21, 2021 at 14:51,
• pole 159. On February 21, 2021 at 13:11,
• pole 160. On February 21, 2021 at 13:17 we saw it from a large distance.
• pole 160-I. On February 21, 2021 at 15:38. It looks like the foundation, a stone platform supported by wooden piles, has been rebuilded completed.
• pole 160-II. On February 21, 2021 at 15:56. (A yellow PVC pole.)

• pole 160-III. (52.668385 7.057564")
• pole 160-IV. (52.677349 7.05869")
• pole 160-V. (52.685274 7.05963")
• pole 160-VI. (52.703105 7.061752")
• pole 160-VII. (52.7210326 7.0638951")
• pole 160-VIII. (52.7215748 7.0639584")
• pole 160-IX. (52.7218455 7.0639923")
• pole 160-X. (52.7222996 7.0640463")
• pole 160-XI. (52.7246047 7.064318")
• pole 161. (52.726773 7.06458")
• pole 162. (52.729367 7.064888")
• pole 162-I. (52.736199 7.065443")
• pole 163. (52.739285 7.065696")
• pole 163-I. (52.742563 7.065975")
• pole 163-II. (52.75486 7.06698")
• pole 163-III. (52.760083 7.067416")
• pole 163-IV. (52.765788 7.067876")
• pole 163-V. (52.776342 7.068751")
• pole 163-VI. (52.786187 7.069564")
• pole 163-VIII. (52.795757 7.070356")
• pole 164. (52.805306 7.071141")

Trigonometric points

• 259308. On April 27, 2022 at 14:54
• 340331. On May 9, 2021 at 12:52
• 359306. On April 24, 2021 at 9:01
• 359308. On January 30, 2022 at 13:26
• 299308. On January 23, 2022 at 14:27

Links

• Het Duits-Nederlandse Grenspalen-archief
• Grenspalen Duitsland-Nederland
• Op de Grens
• Erfgoed monitor
• Langs de grenzen
• RD-coördinaatpunten als open data
• Grenspalenrevue