Changelog

Version 0.0.6

  • some under-the-hood corrections to work with recent R changes
  • some improvements in handling data from certain GNSS receivers, many thanks to the person who supplied a test dataset 🙏
  • updated vignette, various methods of spatially interpolating the raw data are now demonstrated

Version 0.0.5

  • package now reports orthometric height of each spatialised reading, calculated from GPS data, per user request (thanks dukarvat!). Note that elevation data may still need further correction to a local vertical datum before use.

Version 0.0.4

  • package can now handle GPS messages from GLONASS, GALILEO, and multi-GNSS systems

Version 0.0.3

  • Update for compatibility with newer versions of units

Version 0.0.2

  • Bugfix for GH-1 comment processing, many thanks to sanjaykmenon for providing test data

Version 0.0.1

  • Major refactor - process survey lines separately, cope with missing/bad GPS data, better paired data handling
  • Added em38_surveyline() which will process data from an individual survey line output by n38_decode().
  • Survey line decodes can now be sf or data.frame and include both timestamps and sequential ID.
  • renamed em38_spatial() to em38_decode(), the function now outputs a list containing file header data and survey lines.
  • renamed n38_to_points() to em38_from_file(), the output is identical to em38_decode()
  • Survey lines are no longer filtered by dipole mode
  • Added filters for GPS time delay and signal quality.
  • Various small bugfixes

Version 0.0.0.9003

  • n38_decode() better living through proper vectorisation - speed improvement.
  • More unit tests.
  • Package-level metadata.
  • Travis-CI integration

Version 0.0.0.9002

  • New em38_pair() - combines data from manual-mode surveys where horizontal and vertical readings have been taken at each station.
  • Checksums on NMEA-0183 sentences are evaluated for $GPGGA type, failures are dropped.
  • Who’s got two thumbs and forgot about @keywords Internal? *gestures at self*. The help menu is less cluttered now.

Version 0.0.0.9001

  • New n38_to_points() wrapper function - on-disk file to spatial points in one hit.
  • n38_import() variable name fix; x is now path.
  • em38_spatialise() now constrains out_mode values and fails gracefully when allowable values aren’t supplied.
  • Rebuilt demo data to match demo extdata.

Version 0.0.0.9000

  • Basic functions: import N38 files, convert them to a nested list of raw() matrices, decode those, output an M38 file, output a spatial point dataset.
  • Minimal testing for NMEA-0183 sentence parsing (just checks on lat and long extraction from string).