Viestikallio Cartography - Reference bolts, surveying
 

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OH2Z-MAP
viestikallio-kartta.pdf

2002-April-20: Theodolite measurements

(transit-clock, UTC+2h!), (transit-Hz/V )

Nr   Delta-Z   ZN60   ZPultti1  
4   +14941 mm   74.6 m   89.5 m  
5   +11346 mm   78.5 m   89.8 m  
6   + 3176 mm   86.7 m   89.9 m  

  • Tutkamaston jalka: 89.5 + 1.24 = 90.74 metriä (joku aiempi tieto oli 90.94+-0.15 metriä)
  • Monumentin betonijalka: 89.5 + 2.3 = 91.8 metriä
  • Monumentin ylätasanne: 89.5 + 10.6 = 100.1 metriä

Measured point coordinates

The coordinate system has been rotated so that Pernaja broadcast tower is visible at the azimuth of 246.3300 ± 0.0040 gon. Coordinate center is Bolt1, and both lateral coordinates have bias of 500.000 meters. Relative elevation has bias of 50.000 meters.

The number of decimals tries to convey some idea about precission, or presumed confidence..

Piste   Y (N)   X (E)   ZPultti1
+50.000 		  Korkeus   Note
Pultti1   500.000   500.000   50.000   0.000  
Pultti2   507.877   540.167   51.941   0.000  
Log1-Log3
väliharus 		  530.622   455.106   46.342   0.000   Epäillyttävä
Log1-Log3
väliharus 		  532.004   456.111   46.342   0.000   Uusia mittauksia
N4 apupiste   494.794   422.895   z   z  
N4 apupiste   497.244   422.768   z   z   Uusintalasku L1L3 datan perusteella
N4   493.45   398.23   35.06   0.000  
N4   496.687   398.073   35.06   0.000   Uusintalasku L1L3 datan suhteen
N5 apupiste   560.7   438.8   z   z   Huuhaatulos! Teodoliitti liikkui!
N5   593.7   425.4   38.7   0.0   Huuhaatulos edellisestä...
N5huu2   594.2   426.4   38.7   0.0   Huuhaatulos vasenpaan...
N5huu3   593.3   424.4   38.7   0.0   Huuhaatulos oikeaan...
N6 apupiste   525.02   517.79   z   z  
N6   533.63   517.44   46.82   0.00  
HF-vasen   527.93   526.80   49.25   15 ?  
HF-oikea   527.52   526.91   49.25   15 ?  
VHF-masto   520.3   515.6   49.75   8.2  
Tutkamasto   510.8   518.3   50.85   13.0  
Log1-Log3
tarkastus 		  532.031   456.101   z   z  
Pultti-2   507.875   540.167   z   z  
Sähkötolppa   495.4   529.8   z   z  
ObsReunaa1   506.730   500.132   z   z  
ObsReunaa2
GPS reference 		  506.480   502.024   z   z  
ObsReunaa4   505.908   506.309   z   z  
SETI   494.1   482.3   z   z  
Sat2.3m   496.0   490.7   z   z  
Sat1.3m   494.6   494.6   z   z  
Meteosat   492.4   501.1   z   z  
Log1-Log3
tarkistus 		  532.016   456.093   z   z  
Monumentti
NW tolppa 		  493.0   547.6   52.27   8.3  
Monumentti
NE tolppa 		  494.8   553.0   52.31   8.3  
Monumentti
Ylärunko 		  -   -   60.60   z  
Pultti2
tarkistus 		  507.875   540.169   z   z  

On Sunday, 21.4.2002 a separate tree of measurements was done at the adjacent URSA real-estate, and there side N2-N3 got radically different distance from NLS register data. There were no known common measurements in between western area coordinates, and the URSA real-estate, thus they are not combinable (yet)

2002-05-11: That 21.4.2002 measured dataset is seriously in error :-(

Comparing with NLS registered points:

Gap name  Measured  NLS data  Difference %
N4-N5:  100.79 m  100.0 m  + 0.79 %
N5-N6:  111.10 m  109.7 m  + 1.28 %
N4-N6:  125.75 m  124.4 m  + 1.09 %
N2-N3:
N2'-N3:		  117.79 m  103.0 m
116.7 m		  + 14.4 %
+ 0.93 %

The first attempt at plotting measured altitudes into contour map. It goes radically wrong..

In the 2D picture the real-estate boundary lines with corners 1/2/3 are approximative. They have not been measured at this point, nor anything else in the east side of the Monument.

There must be altitude data at least every 3-4 meters for it to make any usefull sense with used software.

2002-05-11:

Lots of measurements produce better maps (circa 270 points over two days of the weekend):  2002-05-12 map.

More pictures: (1, 2, 3, 4)

2002-05-13: 2nd round: PDF, gif, fig, fig-base-gif.

Spot measurements of several places; These results have a bit more of confidence by the undersigner..

Point   X (E)   Y (N)   ZPultti1
+50.000 		  Height   Note
N1   613.69   548.36   47.10   0.00  
N2   669.0_   510.0_   39.9_   0.00  
N3   593.27   440.77   43.88   0.00  
GSM-tower   584.8_   484.3_   48.2_   0.00  
N4   398.07   496.69   35.06   0.00  
N5   425.46   593.46   38.74   0.00  
N6   517.44   533.63   46.82   0.00  

Comparing NLS register data to new measurement data:

Gap name  Measurement  NLS data1  NLS data2 
N1-N2:  67.31 m  74.6 m  67.5 m 
N2-N3:  102.65 m  102.5 m  103.0 m 
N3-N4:  203.05 m  203.2 m  200.7 m 
N4-N5:  100.72 m  100.0 m  100.0 m 
N5-N6:  109.73 m  109.7 m  110.0 m 
N6-N1:  97.37 m  88.6 m  97.5 m 

MMH data1: Boundary point coordinates from National Land Survey database.

MMH data2: Boundary line lengths from real-estate mapping report.

As if point N1 coordinates at the NLS registers differ from the real ones...

The area of the real-estate with these boundary point coordinates is: 2.0607 hectares

(Polygon) Surface area calculation program:   geoarea.pl

Azimuths from N3:

N3->N2:52.853 gon   40.5° mag
N3->N4:317.762 gon   278.9° mag
N3->GSM:  112.234 gon   93.9° mag

Azimuths from N4:

N4->N3:   117.762 gon   98.9° mag
N4->N5:17.56_ gon   8.7° mag

Azimuths from N5:

N5->N4:   217.56_ gon   188.7° mag
N5->N6:136.714 gon   115.9° mag

2002-06-15:

Measurement system has been improved, and now the theodolite communicated the results straight into a data logging computer, and various transcript errors didn't play havoc anymore. All in all, 230 measurements in 8 hours, of which active were about 5.

Cable:   1,   2,   3,   4.

Map plots, and 3D visualisations:

10 meter base grid, and altitude contours by 1.0 meters.

2002-06-15-kartta-1.jpg,   site-points,  
3D-1,   3D-2,   3D-3,   3D-4,  
3D-5,   3D-6,   3D-7,   3D-8.

Varying map plot with varied modelling parameters:

map 1,   map 2,   map 3,   map 4,   map 5.

2002-06-23:

Measurement spots: spots

map-1,   3D-1,   3D-2,   3D-3.

"Regularized Spline with Tension" -- large pictures:
3D-RST-SW,   3D-RST-NE.

2002-06-29:

Measurement spots: spots

"Regularized Spline with Tension" -- large pictures:
3D-RST-SW.   3D-RST-S3,   3D-RST-N3.

With 0.5m height contours:
Map plot,   3D-RST-CONT-S4,   3D-RST-CONT-N4.

3D vectors of buldings and towers:
3D-RST-SW,   3D-RST-NE. 

   ----x----___x__
                  ^--x-xx
                         \xxxx
                              x
                               xx-x----x-------x-------

2002-07-06:

Measured spots (green):   spots.

3D-RST-SE1,   3D-RST-NW1.

Matti Aarnio <matti.aarnio@zmailer.org>; OH2MQK

 

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