Survey data metadata,,,GIS metadata,,,MGR file format details,,,,Archive summary form,
Title,"Groby, Anstey Lane",,Title,Magnetometer data plot,,Title,Appendix A from 'MLgrad601 version 2.00: User's manual',,,Title,Geo_archive_summary_form_Groby
Description,Magnetic gradiometer survey of circa 57ha of farmland,,Description,"Georeferenced raster plot of processed magnetometer data from a survey at Groby in 2022. Greyscale range -/+ 4nT, white to black",,Abstract,Technical description of MGR file format,,,Abstract,Summary of information about the geophysical survey data archive
Survey purpose,Archaeological evaluation of proposed development site,,Table attributes,[Upload dummy table],,People Involved (Author),Geomar Software Inc.,,,People Involved (Author),MOLA Northampton
Coordinate grid system,OSGB-36,,Creator,MOLA Northampton,,People Involved (Copyright),Geomar Software Inc.,,,People Involved (Copyright),MOLA (Museum of London Archaeology)
Co-ordinates,453500 307800,,Copyright holder,MOLA (Museum of London Archaeology),,Year published,2017,,,Year published,2022
Survey duration (start date),05/May/2022,,Period of creation (start date),05/May/2022,,Publisher,Geomar Software Inc.,,,Publisher,MOLA Northampton
Survey duration (end date),16/May/2022,,Period of creation (end date),18/Jul/2022,,Language,English,,,Language,English
Survey by,MOLA Northampton,,Method of data capture,Produced by resampling geophysical data,,Software,Not known,,,Software,Microsoft Word for Microsoft 365 MSO
Copyright holder,MOLA (Museum of London Archaeology),,Coordinate grid system,OSGB-36,,Version,Not known,,,Version,Version 2202 Build 16.0.14931.20118) 32-bit
Solid geology,Sidmouth Mudstone Formation,,Co-ordinates,SEE TABLE BELOW,,,,,,,
Drift geology,"Oadby Diamicton, Thrussington Diamicton, Alluviam and terrace gravel",,Data type,Raster,,,,,,,
Land use,Arable,,Source,Geophysical survey,,,,,,,
Survey type,Magnetometer,,Language,English,,,,,,,
Magnetic north,Non-gridded survey - not applicable,,Hardware / Operating system,PC - Windows 10,,,,,,,
Instrument drift,Not recorded,,Software,TerraSurveyor,,,,,,,
Instrumentation,Fluxgate gradiometer,,Software version,v.3 (32 bit version),,,,,,,
Instrumentation name,Bartington Grad-01-1000L,,,,,,,,,,
Area surveyed,53.36ha,,1,453052 308282,,,,,,,
Method of coverage,Non-gridded data,,2,453206 308404,,,,,,,
Traverse separation,0.8,,3,453095 307927,,,,,,,
Interval,0.25,,4,453482 307960,,,,,,,
Description of file formats,"MGR files contain the raw survey data, comprising interlaced magnetic data and NMEA format GPS data.  The format is a proprietary one, produced by Geomar Software Inc. and supplied by Bartington Instruments Ltd. The files can be processed in Geomar's MultiGrad601 software, and can also be opened and viewed in a text editor such as Notepad. A full technical explanation of the MGR file format can be found in a PDF file deposited with this archive. DAT files comprise the 'raw' data after conversion to a generic XYZ format. Each file comprises a header and four columns of space-separated data values in plain text. The columns are Easting / Northing / data value / time-stamp. The eastings and northings are UTM co-ordinates (zone specified in file header). The units of the data values are nanotesla (nT). The co-ordinates in the data file have been calculated by interpolation and geometric projection from the raw NMEA data points in the MGR file. This process may lead to minor positional inaccuracies. Larger errors may occasionally occur at the end of survey lines and in areas of interrupted GPS signal. The time-stamps are derived from the clock of the tablet or laptop on which the raw data was logged, and may be in error if the time settings on that device were wrong. XCP files are a proprietary file type (TerraSurveyor software, produced by DW Consulting). They contain the processed survey data, together with detailed metadata, including image interpolation settings, co-ordinate system, processing steps and line break positions.",,5,453739 307652,,,,,,,
Additional remarks,,,6,453654 307940,,,,,,,
Language,English,,,,,,,,,,