fix: building comparison data coverage shows too much area as covered…

… (e.g. Bremen)

Fixed by a backend change and new API endpoint to request the correct coverage polygon mask

Refs: #29

src/app/oqt/oqt-api-metadata-provider.service.ts

@@ -2,7 +2,6 @@ import {Injectable} from '@angular/core';
 import {OqtApiService} from './oqt-api.service';
 import {catchError, firstValueFrom, retry, tap, throwError} from 'rxjs';
 import {MetadataResponseJSON} from './types/MetadataResponseJSON';
-import mask from '@turf/mask';
 import {Userlayer} from '../shared/shared-types';
 
 @Injectable({
@@ -61,12 +60,12 @@ export class OqtApiMetadataProviderService {
       // Start a new download only if no download is in progress
       this.cachedData[indicatorKey] = (async () => {
         try {
-          const coverageGeoJSON = await firstValueFrom(this.oqtApi.getIndicatorCoverage(indicatorKey));
+          const coverageGeoJSON = await firstValueFrom(this.oqtApi.getIndicatorCoverage(indicatorKey,true));
           // fill cache
           this.cachedData[indicatorKey] = Promise.resolve(Object.freeze({
             name: indicatorKey,
             title: `Coverage of reference data`,
-            data: mask(coverageGeoJSON),
+            data: coverageGeoJSON,
             style: {color: '#000', stroke: false}
           }) as Userlayer);
 

src/app/oqt/oqt-api.service.ts

@@ -43,7 +43,7 @@ export class OqtApiService {
     return this.post(path, body);
   }
 
-  getIndicatorCoverage(indicatorKey: string): Observable<BaseResponseJSON & FeatureCollection<Polygon|MultiPolygon>> {
+  getIndicatorCoverage(indicatorKey: string, inverse: boolean = false): Observable<BaseResponseJSON & FeatureCollection<Polygon|MultiPolygon>> {
     const path = `metadata/indicators/${indicatorKey}/coverage`;
     return this.get(path) as Observable<BaseResponseJSON & FeatureCollection<Polygon|MultiPolygon>>;
   }