GPKOR

GPKOR

Near-infrared soil spectral library from Gyeonggi Province, South Korea (GPKOR)

VNIR NIR MIR
National — South Korea
1,000+ samples version 3 CC-BY

Database access

Data originally provided by:

Available files

Type Filename Link
NIR spectra — CSV (gzip) ossl_nir_v1.3.csv.gz Download
NIR spectra — Parquet ossl_nir_v1.3.parquet Download
Soil lab measurements — CSV (gzip) ossl_soillab_v1.3.csv.gz Download
Soil lab measurements — Parquet ossl_soillab_v1.3.parquet Download
Soil site metadata — CSV (gzip) ossl_soilsite_v1.3.csv.gz Download
Soil site metadata — Parquet ossl_soilsite_v1.3.parquet Download

Map

Soil site information

  • Coordinates precision: precise, region
  • Sampling depth: top
  • Geography: landuse
  • Variables available (OSSL): 10 out of 10 — see Database description for full schema
  • Populated columns: id.layer_uuid_txt, id.layer_local_c, loc.region_src_txt, site.land.use_src_txt, site.elevation_src_m, observation.date_src_yyyy.mm.dd, latitude.point_wgs84_dd, longitude.point_wgs84_dd, layer.upper.depth_usda_cm, layer.lower.depth_usda_cm

Soil laboratory information

  • Total samples: 1,500
  • Properties available (original): 1
  • Properties standardized (OSSL): 1 — summarized in Table 1 below
  • Categories: carbon & nutrients
  • Original source: see Database access

Hover over any OSSL code in the table below to see its full description.

Table 1: Summary statistics (mean, SD, percentiles) for OSSL-standardized soil properties.
skim_variable n_missing mean sd p0 p25 p50 p75 p100
oc_iso.10694_w.pctOrganic Carbon, ISO 10694Method: iso.10694Unit: w.pct 788 2.78 1.8 0.1 1.5 2.5 3.7 10.5

NIR

  • Acquisition mode: Not available
  • Intensity: reflectance
  • Original range: 1400-2500
  • Instrument: SpectraStar XT
  • Manufacturer: Unity Scientific, Westborough, MA, USA
  • Instrument co-scans: 12
  • Scan repeats: 12
  • Scan accessory: Not available
  • Original resolution: 1 nm
  • Sample preparation: Air-dried, Sieved < 2 mm
  • Additional info: Equipped with UCal calibration software

NIR plot

References

  1. Publication 1