dart_r15_ddcf_20110928_20110928_pro_c.csv

URL: http://dartportal.leeds.ac.uk/dart_public/dart_geophysics_geoscanrm15/dart_r15_ddcf_20110928_20110928_pro_c.csv

Earth Resistance minimally processed geophysics data collected as part of the DART time-lapse study. Data was collected over a fieldwork season from June 2011 to September 2012. The surveys were conducted using a Geoscan RM15 datalogger with MPX15 Multiplexer set up for Twin-Probe surveys at four different mobile probe spacings (0.25m, 0.50m, 0.75m and 1m - file names suffixed with '_A' to '_D' respectively). The survey was undertaken at a X and Y resolution of 0.5m over a 10m grid and recorded with a RM15 Geoscan Data-logger. At each measurement station the mobile probe separation is automatically increased at 0.25m intervals which can be roughly equated with an increased depth estimate of investigation.

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Last updated Dec 16, 2013
Created Dec 16, 2013
Format text/csv
License Open Data Commons Attribution License
can be previewed1
createdDecember 16, 2013
datastore active1
formatCSV
hash0dcbea3da793f0a5d7ae37d3d836015233a935c3
idd65d684c-a35b-45c3-8ee8-9b29ca50655f
instrumentGeoscan RM15 Earth Resistance Meter
instrument.calibrationDetailsCalibrated by Geoscan on purchase (http://www.geoscan-research.co.uk/)
instrument.geophysics.areaSurveyed10m x 10m grid
instrument.geophysics.dataGridSize10m x 10m
instrument.geophysics.directionOfFirstTraversHHCC = NW, HHQF = NE, DDPF = NW, DDCF =SE
instrument.geophysics.earthResistanceSurvey.electrodeConfigurationTwin probe
instrument.geophysics.earthResistanceSurvey.electrodeSpacingAll R15 data with a suffix of 'C' represent data collected with a mobile probe spacing of 0.75m.
instrument.geophysics.earthResistanceSurvey.multipleConfigurationsGeoscan MPX15
instrument.geophysics.methodOfCoverageZigzag
instrument.geophysics.positionOfFirstTraverseHHCC = SE corner, HHQF = SW corner, DDPF = SE corner, DDCF = NW corner
instrument.geophysics.sampleInterval0.5m
instrument.geophysics.surveyTypeEarth resistance, gridded area survey
instrument.geophysics.traverseSeparation0.5m
instrument.headerMetadataNo header information included on download
instrument.measurementDomainAndUnitsOhms
last modifiedDecember 16, 2013
license idodc-by
mimetypetext/csv
on same domain1
position14
resource group id992b6f51-f393-405c-b086-9e479fbb20a2
resource.abstractEarth Resistance minimally processed geophysics data collected as part of the DART time-lapse study. Data was collected over a fieldwork season from June 2011 to September 2012. The surveys were conducted using a Geoscan RM15 datalogger with MPX15 Multiplexer set up for Twin-Probe surveys at four different mobile probe spacings (0.25m, 0.50m, 0.75m and 1m - file names suffixed with '_A' to '_D' respectively). The survey was undertaken at a X and Y resolution of 0.5m over a 10m grid and recorded with a RM15 Geoscan Data-logger. At each measurement station the mobile probe separation is automatically increased at 0.25m intervals which can be roughly equated with an increased depth estimate of investigation.
resource.accessConstraintsNone
resource.bibliographicCitation@data{dart_r15_ddcf_20110928_20110928_pro_c.csv, doi = {not allocated}, url = {http://dartportal.leeds.ac.uk/dart_public/dart_geophysics_geoscanrm15/dart_r15_ddcf_20110928_20110928_pro_c.csv}, author = "{Robert Fry}", publisher = {DART repository, School of Computing, University of Leeds}, title = {dart_r15_ddcf_20110928_20110928_pro_c.csv}, year = {2013}, note = {DART is a Science and Heritage project funded by AHRC and EPSRC. Further DART data and details can be found at http://dartportal.leeds.ac.uk} }
resource.completenessComplete
resource.consistencyConsistent data structure, attribution and relationships.
resource.creation.endDateTime2011-09-28
resource.creation.startDateTime2011-09-28
resource.creation.statusComplete
resource.creator.emailr.j.fry@student.bradford.ac.uk
resource.creator.nameRobert Fry
resource.creator.orcIDhttp://orcid.org/0000-0002-9711-1131
resource.custodian.emaila.r.beck@leeds.ac.uk
resource.custodian.nameAnthony Beck
resource.custodian.orcIDhttp://orcid.org/0000-0002-2991-811X
resource.descriptionInvestigation. The survey is part of a monthly programme of data collection over 2011-2012. Resistance Meter used: Geoscan RM15: These instruments measure the electrical resistance of the earth, using a system of four electrodes (two current and two potential). Depending on the arrangement of these electrodes an exact measurement of a specific volume of earth may be acquired. This resistance value may then be used to calculate the earth resistivity. The most common arrangement is the Twin Probe configuration which involves two pairs of electrodes (one current and one potential): one pair of probes ('remote' probes) remain in a fixed position, whilst the other 'mobile' probes measure the resistance variations across a gird. The resistance is measured in ohms and, when calculated, resistivity is in ohm-metres. The resistance method as used for this area survey employs probe separations of 0.25m, 0.5m, 0.75m and 1m, which samples an approximate hemisphere between the mobile probes. Hence, a greater depth of investigation is theoretically possible with a wider probe spacing. The nature of the overburden and underlying geology will cause variations in this depth. All of the data are stored on an integrated data logger for subsequent post-processing and analysis. The instrument is connected to a computer via a USB-Serial cable and downloaded into Geoplot (Geoscan's in-house processing software). The surveys consist of 10m x 10m grids, and for this survey, measurements from the sensor/probes were logged at intervals of 0.5m along traverses spaced 0.5m apart. This gives 400 measurements per grid. Data are outputted as .CSV text files. Filenames are arranged first by the project (DART), then by instrument (GeoscanRM15), then by field (either DDPF, DDCF, HHCC, HHQF), then by date (YYYYMMDD), then by category (RAW or PRO), then by the mobile probe spacing (A=0.25m, B=0.5m, C=0.75m, D=1m). The RM15 resistance meter provides current ranges of 1mA to 0.1mA at an output voltage of 40V, giving a maximum logged resolution of 0.005 ohms. The operating frequency of 137Hz prevents the instrument to being affected by power line operating frequencies and harmonics. Further details and specifications of the instrument can be found and downloaded from the following link http://www.geoscan-research.co.uk/page22.html
resource.distribution.techniqueDownload only
resource.edition1
resource.fileFormatcsv
resource.funderScience and Heritage Programme, Arts and Humanities Research Council, Engineering and Physical Sciences Research Council
resource.instructionalMethodNone - this resource is not part of an education pack. Look at the education pack collection.
resource.keywordsGeophysics, Archaeology, Monitoring, Remote Sensing, Earth Resistance, Twin Probe, Multiplexed
resource.languageeng
resource.licenseodc-by
resource.license.typeURLhttp://opendatacommons.org/licenses/by/
resource.lineageNone: this is raw data
resource.localURIhttp://dartportal.leeds.ac.uk/dart_public/dart_geophysics_geoscanrm15/dart_r15_ddcf_20110928_20110928_pro_c.csv
resource.metadata.creator.emailr.j.fry@student.bradford.ac.uk
resource.metadata.creator.nameRobert Fry
resource.metadata.creator.orcIDhttp://orcid.org/0000-0002-9711-1131
resource.metadata.languageeng
resource.processingStageComplete
resource.processingStepsData is processed within Geoscan’s Geoplot 3 software (http://www.geoscan-research.co.uk/page9.html) to a basic level. The data is de-spiked to remove any potential errors in the data which are most likely related to bad probe contact with the ground, causing a spike in the readings unrelated to the measurement electrical resistance. No further processing is applied. The minimally processed datasets are also geolocated to real-world X and Y locations in UK Ordnance Survey Grid - OSGB36. Each individual survey dataset is integrated into a single dataset: DART_R15_DART_2011_2012_PRO.dat which is used within the database.
resource.publisherSchool of Computing, University of Leeds
resource.purposemulti-temporal heritage detection
resource.relatedResourcesDartProjectOverview
resource.repositoryNamehttp://dartportal.leeds.ac.uk/
resource.reuseConstraintsNo conditions apply for reuse (remix it, publish it, share it, commercialise it, sell it etc.) except attribution (see resource.bibliographicCitation)
resource.reusePotentialarchaeology, environment, heritage, soil science, farming, ecology, geography, earth science
resource.samplingStrategyEarth resistance survey across a known archaeologcal feature (a ditch) was undertaken across a 10m x 10m survey grid. Survey data is collected once a month over the 15 month survey peroid at a spatial resolution of 0.5m.
resource.topicgeoscientificInformation, environment, heritage, farming, climatology/Meteorology/Atmosphere, imageryBaseMapsEarthCover, society, structure
resource.typeDataset collection
resource.type.specificGeophysics
resource.updateFrequencynot planned
revision ida5701299-3746-46a6-b492-1edcf0a7b138
revision timestampDecember 16, 2013
size15.3 KiB
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spatial-textUnited Kingdom
spatial.boundingBox.OSGB36.east517,826
spatial.boundingBox.OSGB36.north266,114
spatial.boundingBox.OSGB36.referenceSystemOSGB36
spatial.boundingBox.OSGB36.south265,574
spatial.boundingBox.OSGB36.west517,335
spatial.boundingBox.WGS84.eastLongitude-0.274
spatial.boundingBox.WGS84.northLatitude52.28
spatial.boundingBox.WGS84.referenceSystemWGS84
spatial.boundingBox.WGS84.southLatitude52.276
spatial.boundingBox.WGS84.westLongitude-0.282
spatial.defaultReferenceSystemOSGB36
spatial.driftGeologyhttp://www.bgs.ac.uk/lexicon/lexicon.cfm?pub=TILMP
spatial.landuseArable
spatial.ordnanceSurveyPlaceNamehttp://data.ordnancesurvey.co.uk/id/50kGazetteer/72767
spatial.polygon.OSGB36{ "type": "Polygon", "coordinates": [ [ [517335, 266114],[517826, 266114], [517826, 265574], [517335, 265574], [517335, 266114] ] ] }
spatial.polygon.WGS84{ "type": "Polygon", "coordinates": [ [ [-0.281653, 52.280552],[-0.274272, 52.280552], [-0.274272, 52.275799], [-0.281653, 52.275799], [-0.281653, 52.280552] ] ] }
spatial.solidGeologyhttp://www.bgs.ac.uk/lexicon/lexicon.cfm?pub=OXC
stateactive
temporal.rangeDescribedByDataDateTime.end2,011
temporal.rangeDescribedByDataDateTime.start2,012
temporal.resource.availableDate2013-07-15
title.alternativedart_geophysics_geoscanrm15
title.patternWhere appropriate each resource has been named with the following pattern: DART_<3 character sensor/collection name>_<spatial location>_<StartDateTime YYYYMMDD with optional HHMM>_<endDateTime YYYYMMDD with optional HHMM>_<stage PRO or RAW to refer to processed or raw data>_<other stuff>.<suffix>. Hence, the file DART_T3P_DDCF_20110823_20130106_PRO.csv refers to DART data collected using the T3P Imko soil moisture probes at Diddington Clay Field between 23rd August 2011 and 6th January 2013 which has been processed and is available in a comma separated text format.
typefile.upload
webstore last updatedDecember 16, 2013
webstore urlactive