# Distance between coordinates

- Human page: https://happytails.ai/en/geo-tools/distance-between-coordinates/
- Markdown: https://happytails.ai/en/geo-tools/distance-between-coordinates.md
- Structured JSON: https://happytails.ai/agents/en/geo-tools/distance-between-coordinates/index.json
- Visibility: public

## Tool capabilities

| Property | Value |
| --- | --- |
| Tool ID | `distance-between-coordinates` |
| Category | geo-tools |
| Implementation | Registered implementation. Registration alone is not a production-quality guarantee. |
| Browser execution | Automatic updates after valid input or file selection. |
| Browser processing | Browser; see tool notes for network behavior. |
| HTTP API | /api/v1/tools/distance-between-coordinates/run |
| Browser-agent interface | run_current_tool |

### Inputs and settings

Text input: Starting latitude, longitude.

Example or placeholder shown in the interface (not a validated fixture):

```text
38.7, -9.1
```

Enter decimal degrees. Set the destination in the field below. Results update as you type. Up to 1,000,000 characters.

| Setting | Meaning | Control type | Default | Constraints |
| --- | --- | --- | --- | --- |
| `end` | Destination latitude,longitude | text | "48.8566,2.3522" |  |

### HTTP contract

API calls process supplied data on the server. The website origin is `https://happytails.ai`. Server API hosting is not connected on the public website yet. Use your local server origin to test these requests.

```http
POST https://happytails.ai/api/v1/tools/distance-between-coordinates/run
Content-Type: application/json
```

[Detailed operation reference](https://happytails.ai/en/api/tools/distance-between-coordinates.md) · [Shared API guide](https://happytails.ai/en/api.md)

#### Limits

| Limit | Value |
| --- | --- |
| request_bytes | 8388608 |
| input_characters | 1000000 |
| files_bytes | 5242880 |
| max_files | 0 |
| timeout_seconds | 12 |

#### Complete input schema

```json
{
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "input": {
      "type": "string",
      "maxLength": 1000000,
      "default": "",
      "description": "Plain text input. File tools use files instead unless otherwise documented."
    },
    "options": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "end": {
          "type": "string",
          "description": "Destination latitude,longitude",
          "default": "48.8566,2.3522"
        }
      }
    }
  }
}
```

#### Complete output schema

```json
{
  "type": "object",
  "required": [
    "tool",
    "result"
  ],
  "properties": {
    "tool": {
      "type": "string"
    },
    "result": {
      "type": "object",
      "required": [
        "text",
        "files"
      ],
      "properties": {
        "text": {
          "type": [
            "string",
            "null"
          ]
        },
        "data": {
          "description": "Parsed JSON when the textual result is JSON."
        },
        "name": {
          "type": "string"
        },
        "mime": {
          "type": "string"
        },
        "files": {
          "type": "array",
          "items": {
            "type": "object",
            "required": [
              "name",
              "mime",
              "bytes",
              "base64"
            ],
            "properties": {
              "name": {
                "type": "string"
              },
              "mime": {
                "type": "string"
              },
              "bytes": {
                "type": "integer"
              },
              "base64": {
                "type": "string",
                "contentEncoding": "base64"
              }
            }
          }
        }
      }
    }
  }
}
```

#### Error and retry handling

Failures return a non-200 status and `error.code` plus `error.message`. Correct invalid input before retrying; retry server-busy responses with bounded backoff. Returned files contain Base64 data, not persistent download URLs. Decode and inspect the output before treating conversion as successful. See the shared API guide for the complete status and timeout rules.

### Browser-agent workflow

1. Open the human page in a browser that supports WebMCP.
2. Discover the interface exposed by that page; use its actual schema.
3. Select files on the page first when the tool requires files.
4. Call `run_current_tool` with valid input and settings.
5. Inspect the returned result or error and the displayed output. Retrieve files from the displayed download links.

Calls do not automatically copy or download results. Browser permissions still apply. Interface availability alone is not proof of successful execution.

### Planning specification

Geodesic surface distance with units and method; distinguish driving routes.

This describes intended requirements. Use the implementation notes, interface schema and observed output to determine current support.

### Complete machine-readable capability record

```json
{
  "id": "distance-between-coordinates",
  "category": "geo-tools",
  "built": true,
  "requirements": "Geodesic surface distance with units and method; distinguish driving routes.",
  "implementation": {
    "fields": [
      {
        "key": "end",
        "label": "Destination latitude,longitude",
        "value": "48.8566,2.3522",
        "type": "text"
      }
    ],
    "experience": {
      "automatic": true,
      "single": true,
      "label": "Starting latitude, longitude",
      "placeholder": "38.7, -9.1",
      "help": "Enter decimal degrees. Set the destination in the field below. Results update as you type. Up to 1,000,000 characters.",
      "action": null
    },
    "mode": "automatic",
    "interactive": false
  },
  "execution": "POST /api/v1/tools/distance-between-coordinates/run",
  "api": {
    "id": "distance-between-coordinates",
    "name": "Distance between coordinates",
    "category": "geo-tools",
    "description": "Geodesic surface distance with units and method.",
    "notes": "",
    "human_path": "/en/geo-tools/distance-between-coordinates/",
    "method": "POST",
    "endpoint": "/api/v1/tools/distance-between-coordinates/run",
    "schema_url": "/api/v1/tools/distance-between-coordinates",
    "input_schema": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "input": {
          "type": "string",
          "maxLength": 1000000,
          "default": "",
          "description": "Plain text input. File tools use files instead unless otherwise documented."
        },
        "options": {
          "type": "object",
          "additionalProperties": false,
          "properties": {
            "end": {
              "type": "string",
              "description": "Destination latitude,longitude",
              "default": "48.8566,2.3522"
            }
          }
        }
      }
    },
    "output_schema": {
      "type": "object",
      "required": [
        "tool",
        "result"
      ],
      "properties": {
        "tool": {
          "type": "string"
        },
        "result": {
          "type": "object",
          "required": [
            "text",
            "files"
          ],
          "properties": {
            "text": {
              "type": [
                "string",
                "null"
              ]
            },
            "data": {
              "description": "Parsed JSON when the textual result is JSON."
            },
            "name": {
              "type": "string"
            },
            "mime": {
              "type": "string"
            },
            "files": {
              "type": "array",
              "items": {
                "type": "object",
                "required": [
                  "name",
                  "mime",
                  "bytes",
                  "base64"
                ],
                "properties": {
                  "name": {
                    "type": "string"
                  },
                  "mime": {
                    "type": "string"
                  },
                  "bytes": {
                    "type": "integer"
                  },
                  "base64": {
                    "type": "string",
                    "contentEncoding": "base64"
                  }
                }
              }
            }
          }
        }
      }
    },
    "processing": "Server; same transformation code as browser tools",
    "limits": {
      "request_bytes": 8388608,
      "input_characters": 1000000,
      "files_bytes": 5242880,
      "max_files": 0,
      "timeout_seconds": 12
    }
  },
  "agent_processing": "Server; same transformation code as browser tools",
  "browser_agent": {
    "supported": true,
    "name": "run_current_tool",
    "discovery": "WebMCP on the human page in a supporting browser",
    "verification": "See audit/API-AUDIT.md; availability is not verification"
  }
}
```

## Page guide

Geodesic surface distance with units and method.

## Useful next steps

- [Coordinate converter](https://happytails.ai/en/geo-tools/coordinate-converter/): Convert decimal latitude and longitude to degrees, minutes and seconds. ([Markdown](https://happytails.ai/en/geo-tools/coordinate-converter.md))

- [GPX to KML](https://happytails.ai/en/geo-tools/gpx-to-kml/): Convert GPX track geometry and elevation to KML. ([Markdown](https://happytails.ai/en/geo-tools/gpx-to-kml.md))

- [KML to geojson](https://happytails.ai/en/geo-tools/kml-to-geojson/): Convert KML features to GeoJSON. ([Markdown](https://happytails.ai/en/geo-tools/kml-to-geojson.md))

## How to use Distance between coordinates

1. Enter starting latitude, longitude in the input field.
2. The result updates as you type. Adjust the available settings if needed.
3. Review the result, then use Copy result or a download link when available.

## Working with distance between coordinates

Geographic data uses coordinate order, units and reference systems to describe locations. Files that look similar can use different conventions, so a successful parse alone does not establish that points are in the right place.

## Common questions

### Why do points appear in the wrong country?

Swapped coordinate order, incompatible reference systems or wrong units can shift points dramatically. Test a location whose expected position is known.

### Does conversion improve location accuracy?

No. A format conversion preserves or transforms the supplied data; it does not make the original measurement more precise.

Continue your workflow: [Coordinate converter](https://happytails.ai/en/geo-tools/coordinate-converter/), [GPX to KML](https://happytails.ai/en/geo-tools/gpx-to-kml/), [KML to geojson](https://happytails.ai/en/geo-tools/kml-to-geojson/).