add boundary visualization and filtering

components/constants.js

@@ -25,6 +25,15 @@ export const LABELS = {
   },
 }
 
+export const BOUNDARY_PMTILES_URL =
+  'https://carbonplan-offsets-db.s3.us-west-2.amazonaws.com/miscellaneous/project-boundaries.pmtiles'
+
+export const BOUNDARY_LAYER_ID = 'boundaries'
+export const CENTROIDS_LAYER_ID = 'centroids'
+
+export const BASEMAP_PMTILES_URL =
+  'https://carbonplan-maps.s3.us-west-2.amazonaws.com/basemaps/pmtiles/global.pmtiles'
+
 export const COLORS = {
   agriculture: 'orange',
   forest: 'green',