Update README.md

README.md

@@ -45,9 +45,9 @@ Data were collected at the following field sites:
 | Dungeness      | Washington, USA                |
 | Eel            | California, USA                |
 | Elwha          | Washington, USA                |
-| Kenai-Channel  | Alaska, USA                    |
-| Kenai-Leftbank | Alaska, USA                    |
-| Kenai-Rightbank| Alaska, USA                    |
+| Channel        | Alaska, USA                    |
+| Kenai          | Alaska, USA                    |
+| Rightbank      | Alaska, USA                    |
 | Klamath        | California, USA                |
 | Mad            | California, USA                |
 | Nanaimo        | British Columbia, Canada       |
@@ -65,7 +65,7 @@ Kenai locations are further stratified by stratum and bank position (channel, le
 ```
 {location}/
 └── {clip_name}/
-    └── *.png / *.jpg       # sonar frames
+    └── *.png / *.jpg       # Each frame is a derived 3-channel representation constructed from raw sonar frames
 
 coco/
 └── {location}/