diff --git a/src/components/SearchFilters/SearchFilters.css b/src/components/SearchFilters/SearchFilters.css
index f8f7dac2..3185fb71 100644
--- a/src/components/SearchFilters/SearchFilters.css
+++ b/src/components/SearchFilters/SearchFilters.css
@@ -42,7 +42,7 @@
   font-weight: var(--fontWeightBold);
 
   /* background map image */
-  background-image: url(./images/map_icon@2x.png);
+  background-image: url(./images/map_icon216x105.png);
   background-size: cover;
 
   border-radius: 3px;
diff --git a/src/components/SearchFilters/SearchFilters.js b/src/components/SearchFilters/SearchFilters.js
index 29dfb9ba..052042f4 100644
--- a/src/components/SearchFilters/SearchFilters.js
+++ b/src/components/SearchFilters/SearchFilters.js
@@ -40,7 +40,9 @@ const SearchFiltersComponent = props => {
   const classes = classNames(rootClassName || css.root, className);
 
   const onSelectSingle = (customAttribute, option) => {
-    // name of the corresponding query parameter
+    // Name of the corresponding query parameter.
+    // The custom attribute query parameters are named
+    // ca_<custom_attribute_name> in the API.
     const caParam = `ca_${customAttribute}`;
 
     // query parameters after selecting the option
diff --git a/src/components/SearchFilters/images/map_icon@2x.png b/src/components/SearchFilters/images/map_icon216x105.png
similarity index 100%
rename from src/components/SearchFilters/images/map_icon@2x.png
rename to src/components/SearchFilters/images/map_icon216x105.png
diff --git a/src/containers/SearchPage/SearchPage.js b/src/containers/SearchPage/SearchPage.js
index 4cda705f..dcb642f6 100644
--- a/src/containers/SearchPage/SearchPage.js
+++ b/src/containers/SearchPage/SearchPage.js
@@ -41,6 +41,7 @@ const MODAL_BREAKPOINT = 768; // Search is in modal on mobile layout
 const SEARCH_WITH_MAP_DEBOUNCE = 300; // Little bit of debounce before search is initiated.
 const BOUNDS_FIXED_PRECISION = 8;
 
+// extract search parameters, including a custom attribute named category
 const pickSearchParamsOnly = params => {
   const { address, origin, bounds, ca_category } = params || {};
   return { address, origin, bounds, ca_category };
@@ -90,6 +91,7 @@ export class SearchPageComponent extends Component {
   onIdle(googleMap) {
     const { history, location } = this.props;
 
+    // parse query parameters, including a custom attribute named category
     const { address, country, bounds, mapSearch, ca_category } = parse(location.search, {
       latlng: ['origin'],
       latlngBounds: ['bounds'],