create-buffer
Generate a spatial buffer around a specified geometry in WKT format using a defined distance in meters. Enables precise spatial analysis with the PostGIS MCP Server.
Instructions
Geometri etrafında buffer oluştur
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| distance_meters | Yes | Buffer mesafesi (metre) | |
| geometry_wkt | Yes | WKT formatında geometri |
Implementation Reference
- server.js:328-351 (handler)Implements the create-buffer tool: parses input using CreateBufferSchema, queries PostGIS with ST_Buffer to create a buffer around the input geometry, returns buffer in WKT and GeoJSON formats along with area.
case "create-buffer": { const { geometry_wkt, distance_meters } = CreateBufferSchema.parse(args); const result = yield client.query(` SELECT ST_AsText(ST_Buffer(ST_GeomFromText($1), $2)) as buffer_wkt, ST_AsGeoJSON(ST_Buffer(ST_GeomFromText($1), $2)) as buffer_geojson, ST_Area(ST_Buffer(ST_GeomFromText($1), $2)) as buffer_area `, [geometry_wkt, distance_meters]); const response = { original_geometry: geometry_wkt, buffer_distance_meters: distance_meters, buffer_wkt: result.rows[0].buffer_wkt, buffer_geojson: JSON.parse(result.rows[0].buffer_geojson), buffer_area: parseFloat(result.rows[0].buffer_area), }; return { content: [ { type: "text", text: JSON.stringify(response, null, 2), }, ], }; } - server.js:40-43 (schema)Zod schema defining the input parameters for create-buffer: geometry_wkt (string) and distance_meters (number). Used for validation in the handler.
const CreateBufferSchema = zod_1.z.object({ geometry_wkt: zod_1.z.string(), distance_meters: zod_1.z.number(), }); - server.js:133-144 (registration)Registers the create-buffer tool in the ListTools response with name, description, and inputSchema matching the Zod schema.
{ name: "create-buffer", description: "Geometri etrafında buffer oluştur", inputSchema: { type: "object", properties: { geometry_wkt: { type: "string", description: "WKT formatında geometri" }, distance_meters: { type: "number", description: "Buffer mesafesi (metre)" }, }, required: ["geometry_wkt", "distance_meters"], }, },