diff --git a/.gitignore b/.gitignore
index 0014295..34a702f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@ logs
 *.log
 
 .vscode/
+data/
\ No newline at end of file
diff --git a/interfaces/geojson.d.ts b/interfaces/geojson.d.ts
new file mode 100644
index 0000000..0ad6ab5
--- /dev/null
+++ b/interfaces/geojson.d.ts
@@ -0,0 +1,48 @@
+declare module "GeoJSON" {
+
+    export interface Geometry {
+        type: string;
+        coordinates: number[][][];
+    }
+
+    export interface Properties {
+        objectid: number;
+        area_lic: string;
+        god_licenz: number;
+        nom_zsngp: number;
+        nom_list: string;
+        nom: number;
+        data_start: any;
+        data_end: any;
+        vid: string;
+        tip: string;
+        name: string;
+        number: string;
+        sostoyanie: string;
+        priznak: string;
+        nom_lic: string;
+        head_nedro: string;
+        oblast: string;
+        zsngp: string;
+        nedropolz: string;
+        nedropol_1: string;
+        nom_yrfo: number;
+        authority: string;
+        st_area(shape)?: number;
+        st_length(shape)?: number;
+    }
+
+    export interface Feature {
+        type: string;
+        id: number;
+        geometry: Geometry;
+        properties: Properties;
+    }
+
+    export interface RootObject {
+        type: string;
+        features: Feature[];
+    }
+
+}
+