Small fixes

Fix tile generation, and set default map width.

src/backend/services/Tile.service.ts

@@ -97,7 +97,7 @@ export class TileServiceImpl implements TileService {
       } else if (landFlags.ne) {
         cursor += 8;           // 21
         if (landFlags.nw) {
-          cursor += 20;        // 33
+          cursor += 12;        // 33
         }
       } else if (landFlags.nw) {
         cursor += 9;           // 22

src/components/GenerateMapForm/index.tsx

@@ -175,7 +175,7 @@ export const GenerateMapForm: VFC = () => {
                 block
                 placeholder="Width"
                 name="width"
-                defaultValue={512}
+                defaultValue={288}
               />
             </div>
             <div>