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createFunctionsForNorms

@svenvw/fdm-source

@svenvw/fdm-source / fdm-calculator/src / createFunctionsForNorms

Function: createFunctionsForNorms()

createFunctionsForNorms(b_region, year): object

Defined in: fdm-calculator/src/norms/index.ts:15

Parameters​

b_region​

"NL"

year​

"2025"

Returns​

aggregateNormsToFarmLevel()​

aggregateNormsToFarmLevel: (input) => AggregatedNormsToFarmLevel

Aggregates the norm values from individual fields to the farm level. This function takes the output per field of the norm calculation, multiplies each norm by the field's area, and sums these values across all fields to provide total norms for the farm.

The result are three numbers (manure, nitrogen, phosphate) expressed as totals, not per hectare.

Parameters​

input​

InputAggregateNormsToFarmLevel

An array of field data, each containing field ID, area, and calculated norms.

Returns​

AggregatedNormsToFarmLevel

An object containing the total aggregated norms for manure, nitrogen, and phosphate for the farm.

Example​

const fieldData = [
  {
    b_id: "field1",
    b_area: 10, // hectares
    norms: {
      manure: { normValue: 100, normSource: "Source A" }, // kg N/ha
      nitrogen: { normValue: 150, normSource: "Source B" }, // kg N/ha
      phosphate: { normValue: 50, normSource: "Source C" }, // kg P2O5/ha
    },
  },
  {
    b_id: "field2",
    b_area: 5, // hectares
    norms: {
      manure: { normValue: 90, normSource: "Source A" }, // kg N/ha
      nitrogen: { normValue: 140, normSource: "Source B" }, // kg N/ha
      phosphate: { normValue: 45, normSource: "Source C" }, // kg P2O5/ha
    },
  },
];

const aggregatedNorms = aggregateNormsToFarmLevel(fieldData);
// aggregatedNorms will be:
// {
//   manure: (100 * 10) + (90 * 5) = 1000 + 450 = 1450,
//   nitrogen: (150 * 10) + (140 * 5) = 1500 + 700 = 2200,
//   phosphate: (50 * 10) + (45 * 5) = 500 + 225 = 725,
// }

calculateNormForManure​

calculateNormForManure: any = getNL2025DierlijkeMestGebruiksNorm

calculateNormForNitrogen​

calculateNormForNitrogen: any = getNL2025StikstofGebruiksNorm

calculateNormForPhosphate​

calculateNormForPhosphate: any = getNL2025FosfaatGebruiksNorm

collectInputForNorms()​

collectInputForNorms: (fdm, principal_id, b_id) => Promise<NL2025NormsInput> = collectNL2025InputForNorms

Collects all necessary input data from the FDM to calculate the Dutch (NL) norms for the year 2025.

This function orchestrates fetching data for a given farm, its fields, cultivations, and soil analyses, and structures it into a format suitable for the various NL 2025 norm calculation functions.

Parameters​

fdm​

FdmType

An initialized FdmType instance for data access.

principal_id​

PrincipalId

The ID of the principal initiating the data collection.

b_id​

string

The unique identifier of the field for which to collect data.

Returns​

Promise<NL2025NormsInput>

A promise that resolves to an NL2025NormsInput object, containing all the structured data required for the norm calculations.