diff --git a/src/components/ObservationIllustration.vue b/src/components/ObservationIllustration.vue
index a1f7589c1d9b46f24828a43af35c74817e89f1ce..8424f45c94fbdd8041180fb91554fe6cdd2fe49d 100644
--- a/src/components/ObservationIllustration.vue
+++ b/src/components/ObservationIllustration.vue
@@ -67,6 +67,7 @@ export default {
 	},
 	methods: {
 		async compressImage(){
+			//https://ionicframework.com/blog/converting-a-base64-string-to-a-blob-in-javascript/
 			const base64Response = await fetch(this.imageBase64Data);
 			const imageBlob = await base64Response.blob();
 			//console.info(imageBlob);