MCP Server Proj

🚀 MCP Server Projection

MCP Server PROJ provides cartographic projections and coordinate transformations.

✨ Features

Tools

The server implements two coordinate transformation tools:

1. Transform Coordinates

• Transform coordinates between different coordinate systems.
• Support the following coordinate system formats:
  • EPSG code (e.g., EPSG:4326 represents WGS84).
  • WKT format.
  • Proj format.
• Required input parameters:
  • source_crs: Source coordinate system.
  • target_crs: Target coordinate system.
  • coordinates: An array of points containing x, y values.

Example: Transform from WGS84 (EPSG:4326) to Orthographic Projection

Input:
- source_crs: EPSG:4326
- target_crs: +proj=ortho +lon_0=112.364017384874 +lat_0=34.9227297291321 +a=6371010 +units=m +no_defs
- coordinates: [112.364017384874, 34.9227297291321]

Output:
- Transformed coordinates: [0.00000000, 0.00000000]

2. List Supported CRS

• List all supported coordinate system formats and their examples.
• Provide the following detailed examples:
  • EPSG code format.
  • WKT format for geographic and projected coordinate systems.
  • Proj format.

📦 Installation

Configuration

Here is the configuration information for the server:

Development Environment Configuration

const development = {
    port: 3000,
    host: 'localhost',
    db: {
        url: 'mongodb://localhost:27017',
        name: 'mcp_proj'
    }
}

Production Environment Configuration

const production = {
    port: 80,
    host: 'api.mcp.com',
    db: {
        url: 'mongodb://db:mongo@cluster0.mongodb.net/test',
        name: 'mcp_prod'
    }
}

💻 Usage Examples

Debugging

To debug the server, follow these steps:

Step 1: Install Necessary Dependencies

npm install mcp-proj

Step 2: Debug with MCP Inspector

• Download and install MCP Inspector: https://github.com/mcpgis/mcp-inspector/releases
• Open the terminal and run the following command:

inspector.cmd --host localhost:3000

📚 Documentation

Coordinate System Information

EPSG Codes

• EPSG:4326: WGS84 geographic coordinate system, represented in degrees, minutes, and seconds.
• EPSG:3857: Web Mercator projected coordinate system, in meters.

WKT Format

• WGS84:

GEOGCS["WGS 84",
    DATUM["WGS84",
        SPHEROID["WGS84",6378137,2550000.001,
            AUTHORITY["EPSG","7008"]],
        AUTHORITY["EPSG","6085]],
    PRIMEM["Greenwich",0,
        AUTHORITY["EPSG","8901"]],
    UNIT["Degree",0.01745329251994329,
        AUTHORITY["EPSG","9108"]],
    AUTHORITY["EPSG","4326"]]

• Web Mercator:

PROJCS["WGS84 / Web Mercator",
    DATUM["WGS84",
        SPHEROID["WGS84",6378137,2550000.001,
            AUTHORITY["EPSG","7008"]],
        AUTHORITY["EPSG","6085]],
    PRIMEM["Greenwich",0],
    UNIT[" metre",1],
    PROJECTION["Mercator_1SP",
        PARAMETER["central_meridian",0],
        PARAMETER["latitude_of_origin",0],
        PARAMETER["scale_factor",1],
        PARAMETER["false_easting",0],
        PARAMETER["false_northing",0]],
    AUTHORITY["EPSG","3857"],
    AXIS["X",EAST],
    AXIS["Y",NORTH]]

Proj Format

• WGS84:

+proj=longlat +datum=WGS84 +no_defs +type=crs

• Web Mercator Projection:

+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +no_defs

References

For more information about coordinate systems, visit: https://epsg.io/ If you are interested in the JavaScript implementation of coordinate transformation, check out: https://github.com/proj4js/proj4js