Trimble / Leica - Comparison Spreadsheet
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© 2013 - 2016 Myrddyn Phillips. Non-commercial copying is permitted provided attribution is preserved. Re-use of the presented data in this or another format requires the permission of the blog author.
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Contains OS Data © Crown copyright and database rights 2016, licensed under the OGL (see at http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ ).
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Trimble / Leica - Comparison Spreadsheet
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DateName1:50,000 Map1:25,000 MapPosition
Grid Reference
Trimble - Height (m)Difference (metric)Leica - Height (m)Trimble - Collection Time (minutes)Leica - Collection Time (minutes)
Line Survey
Comments
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04/06/2017Moel Tryfan11517, 254SummitSH 515 561428.88812.5m429.0135120N/ALeica GS15 survey conducted by John Barnard, Graham Jackson and Myrddyn Phillips.
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03/06/2017Craig Eigiau11517SummitSH 713 654734.67329.7cm734.97512N/ALeica RX1250 survey conducted by Alan Dawson. Trimble position at SH 71314 65425, Leica position at SH 71315 65425.
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03/06/2017Craig Eigiau11517BwlchSH 711 654713.9212.0cm714.04510N/ALeica RX1250 survey conducted by Alan Dawson. Trimble position at SH 71185 65473, Leica position at SH 71191 65460.
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20/10/2016Mynydd yr Hewyrch124, 12523SummitSH 817 150678.18726.2cm678.449520N/ALeica RX1250 survey conducted by Alan Dawson. Summit at SH 81731 15037 summit identified by John Barnard and Graham Jackson as being the highest.
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20/10/2016Mynydd yr Hewyrch124, 12523SummitSH 817 149678.17921.8cm678.397515N/ALeica RX1250 survey conducted by Alan Dawson.
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20/10/2016Mynydd yr Hewyrch124, 12523SummitSH 816 150678.2819.0cm678.47515N/ALeica RX1250 survey conducted by Alan Dawson.
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20/10/2016Mynydd Gartheiniog124, 12523BwlchSH 809 145552.78829.2cm553.08516N/ALeica RX1250 survey conducted by Alan Dawson.
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20/10/2016Craig Portas124, 12523SummitSH 801 141603.83126.9cm604.1520N/ALeica RX1250 survey conducted by Alan Dawson.
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20/10/2016Craig Portas124, 12523BwlchSH 805 142549.66426.6cm549.93520N/ALeica RX1250 survey conducted by Alan Dawson.
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20/10/2016Waun Oer12423BwlchSH 801 143549.43911.1cm549.55521N/ALeica RX1250 survey conducted by Alan Dawson.
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20/10/2016Cribin Fawr12423SummitSH 794 152658.6919.9cm658.79522N/ALeica RX1250 survey conducted by Alan Dawson.
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19/10/2016Trum y Gwragedd12523BwlchSH 939 278586.43322.7cm586.66516N/ALeica RX1250 survey conducted by Alan Dawson.
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19/10/2016Foel y Geifr12523SummitSH 737 275625.99419.6cm626.19518N/ALeica RX1250 survey conducted by Alan Dawson.
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19/10/2016Foel y Geifr12523BwlchSH 918 246514.69219.8cm514.89515N/ALeica RX1250 survey conducted by Alan Dawson.
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19/10/2016Cefn Coch12523SummitSH 923 266592.61828.2cm592.9520N/ALeica RX1250 survey conducted by Alan Dawson.
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19/10/2016Cefn Coch12523BwlchSH 925 269561.42720.3cm561.63520N/ALeica RX1250 survey conducted by Alan Dawson.
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19/10/2016Pt. 605.6m12523SummitSH 918 257605.27933.1cm605.61520N/ALeica RX1250 survey conducted by Alan Dawson.
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19/10/2016Pt. 605.6m12523BwlchSH 921 263558.53426.6cm558.8515N/ALeica RX1250 survey conducted by Alan Dawson.
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19/10/2016Moel y Cerrig Duon12523SummitSH 923 241624.33610.4cm624.44522N/ALeica RX1250 survey conducted by Alan Dawson.
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05/04/2016Moelfre Uchaf11617SummitSH 897 716395.8040.04cm395.85unknownN/ALeica RX1250 survey conducted by Alan Dawson.
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05/04/2016Moelfre Uchaf11617BwlchSH 827 638251.5073.3cm251.545unknownN/ALeica RX 1250 survey conducted by Alan Dawson.
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03/10/2016Black Hill137216SummitSO 209 929353.2093.7cm353.2465N/ALeica RX1250 survey conducted by Alan Dawson.
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03/10/2016Cefn y Coed137216SummitSO 211 934353.589.4cm353.4865N/ALeica RX1250 survey conducted by Alan Dawson.
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25/09/2016Cruinn a'Bheinn5639, 364SummitNN 365 051632.399.0cm632.485N/ALeica RX1250 survey conducted by Alan Dawson.
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12/03/2016Garreg Lwyd136, 147214SummitSN 942 733* 498.0665.4cm* 498.120560N/ALeica 530 survey conducted by John Barnard, Graham Jackson and Myrddyn Phillips
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12/03/2016Fawnog Gnapiog136, 147214SummitSN 930 761495.40721.7cm495.624530N/ALeica 530 survey conducted by G&J Surveys
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27/12/2015Moel Fama116265SummitSJ 161 626554.7548.9cm554.843560N/ALeica 530 survey conducted by John Barnard and Graham Jackson who pinpointed the highest remaining natural ground with level and staff.
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02/11/2015Pt. 409.9m147200SummitSO 083 579* 409.748* 0.142cm* 409.89630N/ALeica RX1250 survey conducted by Alan Dawson, with * 409.91m Trimble GeoXH 6000 survey also conducted by Alan Dawson.
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02/11/2015Gilwern Hill147200BwlchSO 098 582* 440.691* 0.011cm* 440.68516N/ALeica RX1250 survey conducted by Alan Dawson, with * 440.617m Trimble GeoXH 6000 survey also conducted by Alan Dawson.
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02/11/2015Gilwern Hill147200BwlchSO 143 609* 294.033* 0.123cm* 293.91530N/ALeica RX1250 survey conducted by Alan Dawson, with * 294.048m Trimble GeoXH 6000 survey also conducted by Alan Dawson.
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10/10/2015Bram Rigg Top9819SummitSD 668 964672.6770.0015cmN/A5N/A14.6785Line survey conducted by John Barnard and Graham Jackson with line survey figure quoted being average of two surveys.
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10/10/2015Bram Rigg Top9819ColSD 670 962657.994N/A5N/A
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10/10/2015Calders9819SummitSD 670 960675.3373.3cm675.37540N/ALeica RX1250 survey conducted by Alan Dawson
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10/10/2015Calders9819ColSD 668 967641.1292.1cm641.15530N/ALeica RX1250 survey conducted by Alan Dawson
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09/10/2015Colva Hill148200SummitSO 194 553532.1265.9cm532.185560N/ATrimble height excluding 0.813m measurement offset ascertained from steel tape
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09/10/2015Colva Hill148200BwlchSO 179 553387.7714.6cm387.624560N/ATrimble height excluding 1.086m measurement offset ascertained from steel tape
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30/07/2015Mullach Coire nan Cisteachan42394SummitNN 663 806914.6170.07cm914.615120N/AThirty minute data set with Leica RX1250 conducted by Alan Dawson gave summit height as 914.560m with 5.7cm difference compared to the Trimble result.
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30/07/2015Mullach Coire nan Cisteachan42394BealachNN 669 813884.30810.5cm884.203560N/ASecond of two surveys conducted from the same position
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30/07/2015Mullach Coire nan Cisteachan42394BealachNN 669 813884.265.7cm884.203560N/AFirst of two surveys conducted from the same position
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30/07/2015Mullach Coire nan Cisteachan42394BealachNN 669 813884.40710.4cm884.303530N/AComparison against survey conducted by Alan Dawson with a Leica RX1250
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29/07/2015Creag na Caillich51378SummitNN 562 376914.3716.7cm914.3045120N/A
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16/06/2015Pt. 650m11517, 18SummitSH 660 452649.6725.1cm649.72356014.77Line survey conducted for drop and Trimble and Leica survey conducted for absolute height and drop, with 14.945m drop from the Trimble survey and 14.771m drop from the Leica survey.
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16/06/2015Pt. 650m11517, 18BwlchSH 660 451634.72722.5cm634.95256014.77Line survey conducted for drop and Trimble and Leica survey conducted for absolute height and drop, with 14.945m drop from the Trimble survey and 14.771m drop from the Leica survey.
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04/06/2015Diffwys12418SummitSH 661 234750.3611.5cm750.346560N/ATrimble height excluding 1.179m measurement offset ascertained from level and staff
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04/06/2015Diffwys12418BwlchSH 666 243602.8419.5cm602.746560N/ATrimble height excluding 1.049m measurement offset ascertained from level and staff
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27/05/2015Meall Gaineimh36404SummitNJ 166 051913.6093.0cm913.645120N/A
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01/05/2015Gau Graig12423SummitSH 743 140683.7249.0cmN/A5N/A25.47Line survey conducted for drop and Trimble survey conducted for absolute height, with 25.38m drop value from the Trimble survey.
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01/05/2015Gau Graig12423BwlchSH 739 137658.3419.0cmN/A5N/A25.47Line survey conducted for drop and Trimble survey conducted for absolute height, with 25.38m drop value from the Trimble survey.
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22/04/2015Waun Camddwr124, 12523Summit (rocky)SH 847 205621.46919.7cmN/A5N/A15.445Line survey could not differentiate between moorland and rocky summit. With one 4mm higher and then the other 2mm higher. Only moorland summit surveyed with the Leica GS15.
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22/04/2015Waun Camddwr124, 12523Summit (moorland)SH 848 207621.55211.4cm621.66654515.445Line survey could not differentiate between moorland and rocky summit. With one 4mm higher and then the other 2mm higher. Only moorland summit surveyed with the Leica GS15.
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22/04/2015Waun Camddwr124, 12523BwlchSh 850 207606.06615.5cm606.22154515.445Line survey could not differentiate between moorland and rocky summit. With one 4mm higher and then the other 2mm higher. Only moorland summit surveyed with the Leica GS15.
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10/04/2015Pt. 688m125255SummitSJ 102 330687.9061.5cm687.891645N/A
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10/04/2015Foel Wen125255SummitSJ 099 334690.6926.7cm690.625545N/A
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16/12/2014Moel y Parc116265Summit (trig)SJ 119 699397.7666.6cmN/A5N/A397.7 (levelled from flush bracket)Height from levelled survey dependant upon flush bracket accuracy. Survey by John Barnard, 0.066m height difference.
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16/12/2014Moel y Parc116265Summit (Cairn)SJ 117 700396.32912.9cmN/A5N/A396.2 (levelled from flush bracket)Height from levelled survey dependant upon flush bracket accuracy. Survey by John Barnard, 0.129m height difference.
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16/12/2015Pen y Cloddiau116265SummitSJ 127 678440.53836.7cm440.171590N/AMeasurment given to highest ground beside cairn on top of man-made feature
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16/12/2015Pen y Cloddiau116265BwlchSJ 139 667282.7628.0cm282.842660N/A
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13/06/2014Y Groes Fagl125255SummitSH 988 290Not Given0.3cmN/A10N/A
15.515m drop
Trimble height not given in spreadsheet, Trimble drop came to 15.518m
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13/06/2014Y Groes Fagl125255BwlchSH 988 287Not GivenN/AN/A5N/ATrimble height not given in spreadsheet
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02/09/2014Yr Wyddfa11517SummitSH 609 5431085.67the same1085.6710360N/AOnly surveyed once with Leica, measurement used for comparison
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05/06/2014Yr Wyddfa11517SummitSH 609 5431085.6274.3cm1085.6710360N/A
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08/04/2014Bryn y Beili117265SummitSJ 235 643143.0184.2cm143.0631N/A
31.68m drop
Summit height using Leica equipment determined from line survey
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18/03/2014Bryn y Beili117265BwlchSJ 232 644111.52512.5cm (Leica position slightly lower on road)111.41062
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10/03/2014Bera Bach11517SummitSH 672 677806.3690.151806.521010N/ALeica RX1250 survey conducted by Alan Dawson.
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10/03/2014Bera Bach11517BwlchSH 675 676788.7540.4cm788.75512N/ALeica RX1250 survey conducted by Alan Dawson.
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02/05/2014Gelli Hir136214SummitSN 999 883307.2133.8cm307.17510120N/A
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07/02/2014Gelli Hir136214SummitSN 999 883307.161.5cm307.17510120N/AOnly surveyed once with Leica, measurement used for comparison
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02/05/2014Y Gaer136214SummitSO 013 873307.0570.6cm307.06310120N/A
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07/02/2014Y Gaer136214SummitSO 013 873307.0983.5cm307.06310120N/AOnly surveyed once with Leica, measurement used for comparison
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16/02/2014Foel115, 123254SummitSH 450 506221.2686.8cm221.3361160N/A
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16/02/2014Foel115, 123254BwlchSH 458 501120.1450.05cm120.1381160N/ATrimble height and collection time an average of three surveys
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23/01/2014Cefn yr Ogof116264SummitSH 916 773204.4280.8cm204.421060N/A
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23/01/2014Cefn yr Ogof116264BwlchSH 935 757102.874.0cm102.831660N/A
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13/03/2014Cefn Perfa148200SummitSO 173 579411.2448.3cm411.16118108
30.07m drop
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13/03/2014Cefn Perfa148200BwlchSO 172 577381.1787.6cm381.10225105
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11/01/2014Cefn Perfa148200SummitSO 173 579411.1822.1cm411.1616108Only surveyed once with Leica, measurement used for comparison
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11/01/2014Cefn Perfa148200BwlchSO 172 577381.1454.3cm381.1026105Only surveyed once with Leica, measurement used for comparison
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