calculate_emissions_freight
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Calculate CO2e emissions for freight transport (sea, road, rail, or air cargo). Supports single-leg and multi-leg intermodal journeys. Locations accept UN/LOCODE (e.g. 'GBSOU'), IATA airport code (e.g. 'LHR'), free-text name (e.g. 'Southampton'), or lat/lon coordinates. For multi-leg journeys provide a legs[] array — weight_kg is shared across all legs.
Input schema
| Property | Type | Required | Description |
|---|---|---|---|
| weight_kg | number | yes | Cargo weight in kilograms |
| origin | string | no | Origin: UN/LOCODE (e.g. 'GBSOU'), IATA code (e.g. 'LHR'), or free-text name (e.g. 'Rotterdam') |
| origin_lat | number | no | Origin latitude — alternative to origin string |
| origin_lon | number | no | Origin longitude — alternative to origin string |
| destination | string | no | Destination: UN/LOCODE, IATA code, or free-text name |
| destination_lat | number | no | Destination latitude |
| destination_lon | number | no | Destination longitude |
| mode | string | no | Transport mode — required for single-leg |
| vehicle_type | string | no | Vehicle type: sea: container|bulk|general|roro|vehicle_carrier|refrigerated|ropax|crude_tanker|product_tanker|chemical_tanker|lng_tanker|lpg_tanker — road: van — rail: freight_train — air: international|long_haul|short_haul|domestic |
| legs | array | no | Multi-leg/intermodal: array of up to 10 legs. When provided, top-level origin/destination/mode are ignored. |
Raw JSON schema
{
"type": "object",
"properties": {
"weight_kg": {
"type": "number",
"description": "Cargo weight in kilograms"
},
"origin": {
"type": "string",
"description": "Origin: UN/LOCODE (e.g. 'GBSOU'), IATA code (e.g. 'LHR'), or free-text name (e.g. 'Rotterdam')"
},
"origin_lat": {
"type": "number",
"description": "Origin latitude — alternative to origin string"
},
"origin_lon": {
"type": "number",
"description": "Origin longitude — alternative to origin string"
},
"destination": {
"type": "string",
"description": "Destination: UN/LOCODE, IATA code, or free-text name"
},
"destination_lat": {
"type": "number",
"description": "Destination latitude"
},
"destination_lon": {
"type": "number",
"description": "Destination longitude"
},
"mode": {
"type": "string",
"enum": [
"sea",
"road",
"rail",
"air"
],
"description": "Transport mode — required for single-leg"
},
"vehicle_type": {
"type": "string",
"description": "Vehicle type: sea: container|bulk|general|roro|vehicle_carrier|refrigerated|ropax|crude_tanker|product_tanker|chemical_tanker|lng_tanker|lpg_tanker — road: van — rail: freight_train — air: international|long_haul|short_haul|domestic"
},
"legs": {
"type": "array",
"items": {
"type": "object",
"properties": {
"origin": {
"type": "string",
"description": "Leg origin: LOCODE, IATA, or free-text"
},
"origin_lat": {
"type": "number"
},
"origin_lon": {
"type": "number"
},
"destination": {
"type": "string",
"description": "Leg destination: LOCODE, IATA, or free-text"
},
"destination_lat": {
"type": "number"
},
"destination_lon": {
"type": "number"
},
"mode": {
"type": "string",
"enum": [
"sea",
"road",
"rail",
"air"
],
"description": "Transport mode for this leg"
},
"vehicle_type": {
"type": "string",
"description": "Vehicle type for this leg"
}
},
"required": [
"mode"
],
"additionalProperties": false
},
"description": "Multi-leg/intermodal: array of up to 10 legs. When provided, top-level origin/destination/mode are ignored."
}
},
"required": [
"weight_kg"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}