Difference between maximum and minimum sampled surface elevation
Difference between maximum and minimum sampled surface elevation. The service evaluates the bounded polygon supplied by the caller and returns standardized units across all 30 covered countries.
Asked 6.0x its listed price for its own exampleour last check, 2026-09-24
1 of 1checks answered this week
326 msmedian answer time
$0.001listed price per call
$0.006price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://euroland.halowerk.com/v1/europe-local-relief-parcel
| Category | Everything else |
|---|---|
| Provider host | euroland.halowerk.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.006 | 326 ms |
Example input (from the provider)
{
"body": {
"polygon": [
[
7.095,
51.895
],
[
7.105,
51.895
],
[
7.105,
51.905
],
[
7.095,
51.905
]
]
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"polygon": {
"description": "WGS84 polygon ring. The closing coordinate is optional; maximum span is 0.25 degrees.",
"items": {
"additionalItems": false,
"items": [
{
"maximum": 40.5,
"minimum": -31.5,
"type": "number"
},
{
"maximum": 72.5,
"minimum": 34,
"type": "number"
}
],
"maxItems": 2,
"minItems": 2,
"type": "array"
},
"maxItems": 100,
"minItems": 3,
"type": "array"
}
},
"required": [
"polygon"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"additionalProperties": false,
"properties": {
"authoritative_status": {
"const": "preliminary_non_binding",
"type": "string"
},
"category": {
"const": "europe-wide",
"type": "string"
},
"caveats": {
"items": {
"type": "string"
},
"type": "array"
},
"charged": {
"type": "boolean"
},
"checked_at": {
"type": "string"
},
"confidence": {
"maximum": 1,
"minimum": 0,
"type": "number"
},
"confidence_method": {
"minLength": 20,
"type": "string"
},
"data_date": {
"type": [
"string",
"null"
]
},
"evidence": {
"additionalProperties": false,
"properties": {
"local-relief": {
"additionalProperties": true,
"properties": {
"method": {
"type": "string"
},
"metric": {
"type": "string"
},
"name": {
"type": "string"
},
"sample_count": {
"minimum": 1,
"type": "integer"
},
"unit": {
"type": "string"
},
"value": {
"type": "number"
}
},
"required": [
"metric",
"name",
"unit",
"value",
"sample_count",
"method"
],
"type": "object"
}
},
"required": [
"local-relief"
],
"type": "object"
},
"evidence_classification": {
"const": "derived_from_open_geodata",
"type": "string"
},
"facts": {
"type": "object"
},
"generated_at": {
"type": "string"
},
"geometry": {
"type": [
"object",
"null"
]
},
"limitations": {
"items": {
"type": "string"
},
"minItems": 1,
"type": "array"
},
"meta": {
"type": "object"
},
"payment": {
"additionalProperties": true,
"required": [
"settled",
"price_usdc"
],
"type": "object"
},
"recommended_next_steps": {
"items": {
"type": "string"
},
"minItems": 1,
"type": "array"
},
"result": {
"minLength": 1,
"type": "string"
},
"risk_level": {
"type": "string"
},
"service": {
"const": "europe-local-relief-parcel",
"type": "string"
},
"service_id": {
"const": "eli-0772",
"type": "string"
},
"sources": {
"items": {
"additionalProperties": true,
"properties": {
"authority": {
"type": "string"
},
"dataset": {
"type": "string"
},
"license": {
"type": "string"
},
"retrieved_at": {
"type": "string"
},
"url": {
"type": "string"
}