generate_map
Create custom map images by specifying layers, styles, bounding box, dimensions, and format using WMS GetMap functionality in the GeoServer MCP Server.
Instructions
Generate a map image using WMS GetMap.
Args:
layers: List of layers to include (format: workspace:layer)
styles: Optional styles to apply (one per layer)
bbox: Bounding box [minx, miny, maxx, maxy]
width: Image width in pixels
height: Image height in pixels
format: Image format (png, jpeg, etc.)
Returns:
Dict with map information and URL
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| bbox | No | ||
| format | No | png | |
| height | No | ||
| layers | Yes | ||
| styles | No | ||
| width | No |
Implementation Reference
- src/geoserver_mcp/main.py:371-451 (handler)The core handler function for the 'generate_map' MCP tool. Decorated with @mcp.tool() for registration. Constructs a WMS GetMap request URL using the provided layers, styles, bounding box, and rendering parameters, returning a dictionary with the map URL and parameters.@mcp.tool() def generate_map( layers: List[str], styles: Optional[List[str]] = None, bbox: Optional[List[float]] = None, width: int = 800, height: int = 600, format: str = "png" ) -> Dict[str, Any]: """Generate a map image using WMS GetMap. Args: layers: List of layers to include (format: workspace:layer) styles: Optional styles to apply (one per layer) bbox: Bounding box [minx, miny, maxx, maxy] width: Image width in pixels height: Image height in pixels format: Image format (png, jpeg, etc.) Returns: Dict with map information and URL """ geo = get_geoserver() if geo is None: raise ValueError("Not connected to GeoServer") if not layers: raise ValueError("At least one layer must be specified") # Validate parameters if styles and len(styles) != len(layers): raise ValueError("Number of styles must match number of layers") if not bbox: bbox = [-180, -90, 180, 90] # Default to global extent if len(bbox) != 4: raise ValueError("Bounding box must have 4 coordinates: [minx, miny, maxx, maxy]") # Valid formats valid_formats = ["png", "jpeg", "gif", "tiff", "pdf"] if format.lower() not in valid_formats: raise ValueError(f"Invalid format. Must be one of: {', '.join(valid_formats)}") try: # Construct WMS GetMap URL url = f"{geo.service_url}/wms" params = { "service": "WMS", "version": "1.3.0", "request": "GetMap", "format": f"image/{format}", "layers": ",".join(layers), "width": width, "height": height, "crs": "EPSG:4326", "bbox": ",".join(map(str, bbox)) } # Add styles if provided if styles: params["styles"] = ",".join(styles) # Construct the full URL import urllib.parse query_string = urllib.parse.urlencode(params) map_url = f"{url}?{query_string}" return { "url": map_url, "width": width, "height": height, "format": format, "layers": layers, "styles": styles, "bbox": bbox } except Exception as e: logger.error(f"Error generating map: {str(e)}") raise ValueError(f"Failed to generate map: {str(e)}")