V-LARA Airspace Data

This repository contains airspace data for the V-LARA system.

• Pilot Manual
• ATC Manual

If you'd like to add your country's FIR or a new airspace dataset, follow the steps below.

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📁 Create the two files for your FIR

You will need to create two files named after your FIR (replace xxxx with the FIR name in lowercase):

1. xxxx.geojson – for airspace geometry
2. xxxx.json – for FIR configuration

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🌍 Add .geojson File (xxxx.geojson)

This file should follow the GeoJSON format and define each airspace volume as a Feature.

Example: myfir.geojson

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "properties": {
        "name": "TSA1",
        "type": "TSA",
        "upperFL": 660,
        "lowerFL": 95
      },
      "geometry": {
        "type": "Polygon",
        "coordinates": [
          [
            [27.1153, 57.7875],
            [26.5861, 57.6333],
            [26.1611, 57.9083],
            [25.2217, 58.2014],
            [25.2222, 58.2736],
            [25.7456, 58.3797],
            [26.75, 58.3667],
            [27.1675, 57.9175],
            [27.1153, 57.7875]
          ]
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {
        "name": "TSA2",
        "type": "TSA",
        "upperFL": 245,
        "lowerFL": 95,
        "mustBeBookedWith": ["TSA1"],
        "activationLimits": [
          {"time": ["0900", "2000"], "month": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12], "weekday": [1, 2, 3, 4, 5, 6, 7]},
          {"time": ["2000", "2200"], "month": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12], "weekday": [1, 2, 3, 4, 5]}
        ]
      },
      "geometry": {
        "type": "Polygon",
        "coordinates": [
          [
            [23.2075, 59.1261],
            [24.2236, 59.3049],
            [24.2611, 59.2283],
            [23.4333, 58.9],
            [23.2075, 59.1261]
          ]
        ]
      }
    }
  ]
}

✅ Required GeoJSON Properties

Each Feature must contain the following fields inside its properties object:

Field	Type	Description
name	string	airspace name (e.g., "TSA1"). The airspace must match with the name in TopSky areas.txt!
type	string	Type of airspace (e.g., "TSA", "Local TRA"). Keep the type as short as possible.
lowerFL	number	Lower flight level (e.g., SFC → 0. 500FT → 5. 9500FT → 95)
upperFL	number	Upper flight level (e.g., 10700 FT → 107. UNL → 999)
(mustBeBookedWith)	array	Optional list of airspace names that must be booked together or prior (e.g., ["TSA1", "TSA2"])
(activationLimits)	array	Optional list of time + month + weekday limitations (see example json above)
(foreignClusters)	array	Optional list of fir codes in lower case (e.g., ["efin"]) - check information below!

Make sure that:

• Each airspace has a distinct name and it shall match with TopSky areas.txt.
• Note! If you leave the name empty "name": "", the shape will be visible on the map but not as a reservable airspace. This might be useful in order to display country borders etc.
• Coordinates are listed in the [longitude, latitude] format.
• The polygon is closed — the first and last coordinate pairs should match.

Cross-Border areas (optional):

• If the area is located near FIR borders, and both parties require details of the same airspace, add the following line to the airspace properties:
• "foreignClusters": ["efin"] → Helsinki FIR will also get the details of this airspace
• The areas may be added into the geojson of the other FIR either as "name": "" (not reservable) or with the same name as in the parent FIR (reservable in both FIRs)
• Currently only the FIR creating the reservation will receive the automatic TopSky activation
• Make sure the airspace name matches in both FIRs TopSky areas.txt

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📦 Add .json File (xxxx.json)

This file defines how the FIR is displayed in the app and how airspaces are grouped.

✅ Example Structure

{
  "mapCenter": [24.3, 58.5510],
  "mapZoom": 5.4,
  "pilotDocs": "https://wiki.vatsim-scandinavia.org/books/finnish-airports-charts/page/v-lara-airspace-reservation",
  "groups": {
    "GROUP1": {
      "airspaces": ["TSA1", "TSA2"],
      "lowerFL": 30,
      "upperFL": 999
    }
  }
}

🔍 JSON Field Descriptions

Field	Type	Description
mapCenter	[number, number]	Map center [longitude, latitude] for the default view
mapZoom	number	Initial zoom level (e.g., 5.4)
(pilotDocs)	string	Optional URL to local procedures for Area Reservations
groups	object	A collection of airspace groups for organizing layers and filtering

Each entry in the groups object defines a preset selection of many airspace blocks. This makes it faster for the user to select commonly grouped airspace selections.

🧱 Group Object Structure

Each group must include:

Field	Type	Description
airspaces	string[]	A list of airspace names that belong to this group
lowerFL	number	Preset Lower FL (e.g., 30)
upperFL	number	Preset Upper FL (e.g., 999)

Make sure that the airspaces name's matches with the names defined in the .geojson file.

Example with multiple groups:

{
  "mapCenter": [24.3, 58.5510],
  "mapZoom": 6,
  "groups": {
    "TRIDENT": {
      "airspaces": ["TSA1", "TSA2"],
      "lowerFL": 0,
      "upperFL": 245
    },
    "POKKA": {
      "airspaces": ["TSA3", "TSA4", "TRA87W"],
      "lowerFL": 95,
      "upperFL": 999
    }
  }
}

If your FIR does not have grouped airspace reservations:

{
  "mapCenter": [24.3, 58.5510],
  "mapZoom": 6,
  "groups": {
    "No Presets": {
      "airspaces": [""],
      "lowerFL": 0,
      "upperFL": 999
    }
  }
}

✅ Validation Tips

Before submitting a Pull Request, ensure:

• Each airspace Feature in your .geojson has a unique and descriptive name and the name matches with an airspace defined in TopSky areas.txt.
• All names in your .json file’s groups.airspaces array match exactly with the name values in your .geojson
• Your .geojson file is valid GeoJSON (you can use geojson.io or geojsonlint.com to validate)
• Polygons in the .geojson are properly closed (i.e. the first and last coordinate pair are the same)
• Your .json file is valid JSON (no trailing commas, properly quoted strings, etc.)
• Flight levels (lowerFL and upperFL) are correct
• mapCenter and mapZoom are appropriate to display the full FIR area. You may login to V-LARA profile EACCZAMC (test environment) to view boundaries of different FIR's. The coordinates are shown in the top-right corner of the Map Display.

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🔗 Connect with EuroScope TopSky plugin

After submitting and Approved Pull Request:

• Navigate to lara-backend.lusep.fi/topsky/xxxx.txt (replace xxxx with your FIR code)
• The file shows all currently ongoing reservations. By default it includes a dummy reservation VLARA:350101:350101:0:1000:1001:0:100:VLARA:. This makes sure that TopSky is able to read the file at all times even when no reservations are present.
• Navigate to plugins/ TopSkySettings.txt and add the following details:
  • HTTP_Areas_Remote_URL=https://lara-backend.lusep.fi/topsky/xxxx.txt
  • Areas_PreActiveTime=900 use at least 900s (15min)
• For automatic area loading, the Airspace Management Window shall be set to open automatically on startup

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❓ Questions and manuals

You may contact me on Discord for any questions.

• Pilot Manual
• ATC Manual