Update README.md

README.md

@@ -25,8 +25,8 @@
 ## Training GBTs
 - training data: monthly mean environmental indicators (2017-2020), boat presence (may indicate fishing)
 - training data filtering:
-    - within 24-nm PH economic zone
+    - remove all points outside 24-nm PH economic zone
     - remove all points on shipping lines
     - remove all points with any indicator no value
     - remove all points with chl >= 3.5 (outlier, usually in lakes)
-    - remove all negative samples (no boat) within and near 20km of core fishing areas
+    - remove all negative samples (no boat) within and near 4km of core fishing areas