diff --git a/functions/src/import-geojson.ts b/functions/src/import-geojson.ts
index 7816190ca..7b3d38240 100644
--- a/functions/src/import-geojson.ts
+++ b/functions/src/import-geojson.ts
@@ -101,7 +101,7 @@ export function importGeoJsonCallback(
             }
           })
           .on('data', (data: any) => {
-            if (!hasError) onGeoJsonFeature(data, surveyId, jobId);
+            if (!hasError) onGeoJsonFeature(data, jobId);
           })
       );
     } catch (err) {
@@ -187,11 +187,7 @@ export function importGeoJsonCallback(
    * GeoJSON Feature objects within the file. It checks the feature type, geometry
    * validity, and converts the feature to a document data format for insertion.
    */
-  function onGeoJsonFeature(
-    geoJsonFeature: any,
-    surveyId: string,
-    jobId: string
-  ) {
+  function onGeoJsonFeature(geoJsonFeature: any, jobId: string) {
     if (geoJsonFeature.type !== 'Feature') {
       console.debug(
         `Skipping Feature with invalid type ${geoJsonFeature.type}`
diff --git a/web/src/app/components/shared/import-dialog/import-dialog.component.html b/web/src/app/components/shared/import-dialog/import-dialog.component.html
index 8a7655020..a9b62df13 100644
--- a/web/src/app/components/shared/import-dialog/import-dialog.component.html
+++ b/web/src/app/components/shared/import-dialog/import-dialog.component.html
@@ -33,6 +33,15 @@ <h2 mat-dialog-title>
     >
   </h2>
   <mat-dialog-content>
+    <p
+      class="format-description"
+      i18n="@@app.dialogs.importSites.formatDescription"
+    >
+      Upload a GeoJSON <code>FeatureCollection</code>. Coordinates must use the
+      WGS84 (CRS84) coordinate reference system, the only projection currently
+      supported. Each feature's <code>name</code> property sets the site name,
+      and the feature's top-level <code>id</code> sets the site ID.
+    </p>
     <form [formGroup]="uploadForm">
       <div>
         <file-upload
diff --git a/web/src/app/components/shared/import-dialog/import-dialog.component.scss b/web/src/app/components/shared/import-dialog/import-dialog.component.scss
index 9f0bab569..71d0cbc15 100644
--- a/web/src/app/components/shared/import-dialog/import-dialog.component.scss
+++ b/web/src/app/components/shared/import-dialog/import-dialog.component.scss
@@ -18,6 +18,18 @@ file-upload {
   width: 300px;
 }
 
+.format-description {
+  max-width: 300px;
+  margin: 0 0 16px;
+  font-size: 14px;
+  line-height: 1.4;
+  color: rgba(0, 0, 0, 0.6);
+
+  code {
+    font-family: monospace;
+  }
+}
+
 .spinner {
   margin: 0px auto;
 }
diff --git a/web/src/locale/messages.json b/web/src/locale/messages.json
index 64d1e86ca..b1f4d1cb8 100644
--- a/web/src/locale/messages.json
+++ b/web/src/locale/messages.json
@@ -116,6 +116,7 @@
     "app.labels.termsOfService": "Terms of service",
     "app.dialogs.importSites.importingSites": "Importing sites...",
     "app.dialogs.importSites.title": "Import data collection sites (.geojson)",
+    "app.dialogs.importSites.formatDescription": " Upload a GeoJSON {$START_TAG_CODE}FeatureCollection{$CLOSE_TAG_CODE}. Coordinates must use the WGS84 (CRS84) coordinate reference system, the only projection currently supported. Each feature's {$START_TAG_CODE}name{$CLOSE_TAG_CODE} property sets the site name, and the feature's top-level {$START_TAG_CODE}id{$CLOSE_TAG_CODE} sets the site ID. ",
     "app.labels.upload": "Upload",
     "app.labels.downloadCsv": "Download job data (CSV)",
     "app.labels.downloadGeojson": "Download site locations (GeoJSON)",