vgrib2

A library for parsing GRIB files written entirely in Typescript

Installation

$ npm install vgrib2

Usage

Parse GRIB File

import fs from 'fs'
import { GRIB } from 'vgrib2'

const gribFile = fs.readFileSync('./path/to/file.grib2')

const grib = GRIB.parse(gribFile)
// No Table Lookup (useful for adding new tables)
const gribNoLookup = GRIB.parseNoLookup(gribFile)

Tables

List of tables that have been ported from GRIB2 Doc

Table 0

| Table Name | Status | | ---------------------------------------- | :----: | | Table 0.0 - Discipline of Processed Data | ✅ |

Table 1

| Table Name | Status | | --------------------------------------------- | :----: | | Table 1.0 - GRIB Master Tables Version Number | ❌ | | Table 1.1 - GRIB Local Tables Version Number | ❌ | | Table 1.2 - Significance of Reference Time | ✅ | | Table 1.3 - Production Status of Data | ❌ | | Table 1.4 - Type of Data | ✅ | | Table 1.5 - Identification Template Number | ❌ | | Table 1.6 - Type of Calendar | ❌ |

Table 2

N/A

Table 3

| Table Name | Status | | ------------------------------------------------------------------ | :----: | | Table 3.0 - Source of Grid Definition | ❌ | | Table 3.1 - Grid Definition Template Number | ✅ | | Table 3.2 - Shape of the Reference System | ✅ | | Table 3.3 - Resolution and Component Flags | ❌ | | Table 3.4 - Scanning Mode | ❌ | | Table 3.5 - Projection Center | ❌ | | Table 3.6 - Spectral Data Representation Type | ❌ | | Table 3.7 - Spectral Data Representation Mode | ❌ | | Table 3.8 - Grid Point Position | ❌ | | Table 3.9 - Numbering Order of Diamonds | ❌ | | Table 3.10 - Scanning Mode for One Diamond | ❌ | | Table 3.11 - Interpretation of List of Numbers at end of section 3 | ❌ | | Table 3.15 - Physical Meaning of Vertical Coordinate | ❌ | | Table 3.20 - Type of Horizontal Line | ❌ | | Table 3.21 - Vertical Dimension Coordinate Values Definition | ❌ |

Table 4

| Table Name | Status | | ------------------------------------------------------------------------- | :----: | | Table 4.0 - Product Definition Template Number | ✅ | | Table 4.1 - Parameter Category by Product Discipline | ✅ | | Table 4.2 - Parameter Number by Product Discipline and Parameter Category | ✅ | | Table 4.3 - Type of Generating Process | ✅ | | Table 4.4 - Indicator of Unit of Time Range | ✅ | | Table 4.5 - Fixed Surface Types and Units | ✅ | | Table 4.6 - Type of Ensemble Forecast | ❌ | | Table 4.7 - Derived Forecast | ❌ | | Table 4.8 - Clustering Method | ❌ | | Table 4.9 - Probability Type | ❌ | | Table 4.10 - Type of Statistical Processing | ❌ | | Table 4.11 - Type of Time Intervals | ❌ | | Table 4.12 - Operating Mode | ❌ | | Table 4.13 - Quality Control Indicator | ❌ | | Table 4.14 - Clutter Filter Indicator | ❌ | | Table 4.15 - Type of Spatial Processing used | ❌ | | Table 4.16 - Quality Value Associated with Parameter | ❌ | | Table 4.91 - Type of Interval | ❌ | | Table 4.201 - Precipitation Type | ❌ | | Table 4.202 - Precipitable Water Category | ❌ | | Table 4.203 - Cloud Type | ❌ | | Table 4.204 - Thunderstorm Coverage | ❌ | | Table 4.205 - Presence of Aerosol | ❌ | | Table 4.206 - Volcanic Ash | ❌ | | Table 4.207 - Icing | ❌ | | Table 4.208 - Turbulence | ❌ | | Table 4.209 - Planetary Boundary-Layer Regime | ❌ | | Table 4.210 - Contrail Intensity | ❌ | | Table 4.211 - Contrail Engine Type | ❌ | | Table 4.212 - Land Use | ❌ | | Table 4.213 - Soil Type | ❌ | | Table 4.215 - Remotely Sensed Snow Coverage | ❌ | | Table 4.216 - Elevation of Snow Covered Terrain | ❌ | | Table 4.217 - Cloud Mask Type | ❌ | | Table 4.218 - Pixel Scene Type | ❌ | | Table 4.219 - Cloud Top Height Quality Indicator | ❌ | | Table 4.220 - Horizontal Dimension Processed | ❌ | | Table 4.221 - Treatment of Missing Data | ❌ | | Table 4.222 - Categorical Result | ❌ | | Table 4.223 - Fire Detection Indicator | ❌ | | Table 4.224 - Categorical Outlook | ❌ | | Table 4.225 - Weather | ❌ | | Table 4.227 - Icing Scenario (Weather/Cloud Classification) | ❌ | | Table 4.230 - Atmospheric Chemical or Physical Type | ❌ | | Table 4.233 - Aerosol Type | ❌ | | Table 4.234 - Canopy Cover Fraction | ❌ | | Table 4.235 - Wave-Generated Wave Spectral Description | ❌ | | Table 4.236 - Soil Texture Cover Fraction | ❌ | | Table 4.240 - Type of Distribution Function | ❌ | | Table 4.241 - Coverage Attributes | ❌ | | Table 4.242 - Tile Classification | ❌ | | Table 4.243 - Tile Class | ❌ | | Table 4.244 - Quality Indicator | ❌ |

Table 4.2-X-X

Discipline 0 - Meteorological products

| Table Name | Status | | -------------------------------------------------- | :----: | | Table 4.2-0-0 - Temperature | ✅ | | Table 4.2-0-1 - Moisture | ❌ | | Table 4.2-0-2 - Momentum | ✅ | | Table 4.2-0-3 - Mass | ❌ | | Table 4.2-0-4 - Short wave radiation | ❌ | | Table 4.2-0-5 - Long wave radiation | ❌ | | Table 4.2-0-6 - Cloud | ❌ | | Table 4.2-0-7 - Thermodynamic stability indices | ❌ | | Table 4.2-0-13 - Aerosols | ❌ | | Table 4.2-0-14 - Trace gases (e.g. Ozone, CO2) | ❌ | | Table 4.2-0-15 - Radar | ❌ | | Table 4.2-0-16 - Forecast Radar Imagery | ❌ | | Table 4.2-0-17 - Electrodynamics | ❌ | | Table 4.2-0-18 - Nuclear/radiology | ❌ | | Table 4.2-0-19 - Physical atmospheric Properties | ❌ | | Table 4.2-0-20 - Atmospheric Chemical Constituents | ❌ | | Table 4.2-0-190 - CCITT IA5 string | ❌ | | Table 4.2-0-191 - Miscellaneous | ❌ |

Discipline 1 - Hydrologic products

| Table Name | Status | | ---------------------------------------------------- | :----: | | Table 4.2-1-0 - Hydrology Basic | ❌ | | Table 4.2-1-1 - Hydrology Probabilities | ❌ | | Table 4.2-1-2 - Inland Water and Sediment Properties | ❌ |

Discipline 2 - Land Surface products

| Table Name | Status | | ---------------------------------------------------------- | :----: | | Table 4.2-2-0 - Vegetation/Biomass | ❌ | | Table 4.2-2-1 - Agricultural/aquacultural special products | ❌ | | Table 4.2-2-2 - Transportation related products | ❌ | | Table 4.2-2-3 - Soil Products | ❌ | | Table 4.2-2-4 - Fire Weather Products | ❌ | | Table 4.2-2-5 - Glaciers and Inland Ice Products | ❌ |

Discipline 3 - Space products

| Table Name | Status | | --------------------------------------- | :----: | | Table 4.2-3-0 - Image format Products | ❌ | | Table 4.2-3-1 - Quantitative Products | ❌ | | Table 4.2-3-2 - Cloud Properties | ❌ | | Table 4.2-3-3 - Flight Rules Conditions | ❌ | | Table 4.2-3-4 - Volcanic Ash | ❌ | | Table 4.2-3-5 - Sea-surface Temperatur | ❌ | | Table 4.2-3-6 - Solar radiation | ❌ |

Discipline 4 - Space Weather products

| Table Name | Status | | ----------------------------------------------------- | :----: | | Table 4.2-4-0 - Temperature | ❌ | | Table 4.2-4-1 - Momentum | ❌ | | Table 4.2-4-2 - Charged Particle Mass and Number | ❌ | | Table 4.2-4-3 - Electric and Magnetic Fields | ❌ | | Table 4.2-4-4 - Energetic Particles | ❌ | | Table 4.2-4-5 - Waves | ❌ | | Table 4.2-4-6 - Solar Electromagnetic Emissions | ❌ | | Table 4.2-4-7 - Terrestrial Electromagnetic Emissions | ❌ | | Table 4.2-4-8 - Imagery | ❌ | | Table 4.2-4-9 - Ion-Neutral Coupling | ❌ |

Discipline 10 - Oceanographic products

| Table Name | Status | | --------------------------------------- | :----: | | Table 4.2-10-0 - Waves | ❌ | | Table 4.2-10-1 - Currents | ❌ | | Table 4.2-10-2 - Ice | ❌ | | Table 4.2-10-3 - Surface Properties | ❌ | | Table 4.2-10-4 - Sub-surface Properties | ❌ |

Table 5

| Table Name | Status | | -------------------------------------------------------- | :----: | | Table 5.0 - Data Representation Template Number | ✅ | | Table 5.1 - Type of Original Field Values | ✅ | | Table 5.2 - Matrix Coordinate Value Function Definition | ❌ | | Table 5.3 - Matrix Coordinate Parameter | ❌ | | Table 5.4 - Group Splitting Method | ❌ | | Table 5.5 - Missing Value Management for Complex Packing | ❌ | | Table 5.6 - Order of Spatial Differencing | ❌ | | Table 5.7 - Precision of Floating Point Numbers | ❌ | | Table 5.40 - Type of Compression | ❌ |

Table 6

| Table Name | Status | | ----------------------------- | :----: | | Table 6.0 - Bit Map Indicator | ❌ |

Table 7

| Table Name | Status | | -------------------------------- | :----: | | Table 7.0 - Data Template Number | ❌ |