Data sections

A LIBS observation log links a sampling log to the foss micral provision. LIBS uses compressed pellets of milled soil (ds2c preparation — dried, sieved, and compressed) rather than the sieved or milled powders used by the NIR and FTIR instruments.

Prerequisites

Notebook cell

In load_ai4sh_spectral_data.ipynb, the Manage LIBS observation log cell runs:

job_file = 'import_data/LIBS_spectra/job_libs_observation_log.json'

structured_process_D, scheme_params_D = Initiate_process(notebook_path, scheme_file, job_file)

if structured_process_D is not None:
    Run_process(structured_process_D, scheme_params_D)

Job file

Path: ./ai4sh/import_data/LIBS_spectra/job_libs_observation_log.json

{
  "process": {
    "job_folder": "import_data/LIBS_spectra/observation_log",
    "process_sub_folder": "process",
    "pilot_file": "xspatula_add_observation_log_pilot.txt"
  }
}

Process file example

Path: ./ai4sh/import_data/LIBS_spectra/observation_log/process/ai4sh_ch_lens_2026@libs_ds2c_observation_log.json

{
  "process": [
    {
      "process": "manage_observation_log",
      "parameters": {
        "sampling_log_id__sampling_log_name": "ai4sh_ch_lens_2025",
        "provision_id__provision_name": "foss micral",
        "name": "ai4sh_ch_lens_2026@libs_ds2c",
        "contact_name": "thomas gumbricht",
        "contact_email": "thomas.gumbricht@natgeo.su.se",
        "preparation_id__preparation_name": "ds2c",
        "preservation_id__preservation_name": "ds2",
        "laboratory": 1
      }
    }
  ]
}

14 observation log process files — one per field site.

Parameters

Parameter Description
sampling_log_id__sampling_log_name FK lookup: parent sampling log
provision_id__provision_name FK lookup: foss micral
name Observation log name — pattern: <sampling_log_year+1>@libs_<preparation>
contact_name Responsible person
contact_email Contact email
preparation_id__preparation_name FK lookup: ds2c (dried, sieved 2 mm, compressed)
preservation_id__preservation_name FK lookup: preservation method
laboratory Integer flag — 1 for laboratory observations

Note: LIBS observation logs do not include storage_id__storage_name or transportation_id__transportation_name fields (these are optional and omitted here).

Next step

Proceed to Manage LIBS observation.

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