add hips2fits fallback

nmcardoso · Jan 29, 2025 · f52e29a · f52e29a
1 parent e0cbf98
commit f52e29a
Showing 1 changed file with 31 additions and 10 deletions.
diff --git a/app/services/legacy.ts b/app/services/legacy.ts
@@ -8,6 +8,7 @@ import { processResponse } from './utils'
 
 const LEGACY_RGB = 'https://www.legacysurvey.org/viewer/cutout.jpg'
 // const LEGACY_RGB = 'https://checker-melted-forsythia.glitch.me/legacy.jpg'
+const LEGACY_RGB_2 = 'http://alasky.cds.unistra.fr/hips-image-services/hips2fits'
 const SCS_URL = 'https://bittersweet-large-ticket.glitch.me/https://datalab.noirlab.edu/scs/ls_dr10/tractor'
 const MAG_R = [0, 8.5, 9.5, 10.5, 11.5, 12.5, 13.5, 14.5, 15.5, 16.5, 17.5, 18.5, 19.5, 100]
 const CF_CIRC_LINEAR = [11.50, 11.50, 6.00, 5.90, 5.30, 4.50, 3.95, 3.45, 4.20, 4.80, 7.10, 5.60, 1.50, 1.50]
@@ -77,17 +78,37 @@ export class LegacyStamp implements IResourceFetch {
     return await queryClient.fetchQuery({
       queryKey: [this.ra, this.dec, this.size, pixscale, this.layer],
       queryFn: () => processResponse(
-        () => axios.get(LEGACY_RGB, {
-          responseType: 'blob',
-          signal: semaphore.getSignal(),
-          params: {
-            ra: this.ra,
-            dec: this.dec,
-            size: this.size,
-            pixscale: pixscale,
-            layer: this.layer
+        async () => {
+          let resp
+          try {
+            resp = await axios.get(LEGACY_RGB, {
+              responseType: 'blob',
+              signal: semaphore.getSignal(),
+              params: {
+                ra: this.ra,
+                dec: this.dec,
+                size: this.size,
+                pixscale: pixscale,
+                layer: this.layer
+              }
+            })
+          } catch {
+            resp = await axios.get(LEGACY_RGB_2, {
+              responseType: 'blob',
+              signal: semaphore.getSignal(),
+              params: {
+                hips: 'CDS/P/DESI-Legacy-Surveys/DR10/color',
+                ra: this.ra,
+                dec: this.dec,
+                width: this.size,
+                height: this.size,
+                fov: (pixscale / 3600) * this.size,
+                format: 'png',
+              }
+            })
           }
-        })
+          return resp
+        }
       )
     })
   }