Added memory-efficient reading of SWAN files and support for ZERO key…

…word.
openearth · Feb 7, 2018 · a037f67 · a037f67
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diff --git a/docs/whatsnew.rst b/docs/whatsnew.rst
@@ -22,7 +22,13 @@ Improvements
 New functions/methods
 ^^^^^^^^^^^^^^^^^^^^^
 
-None.
+* Added `SwanBlockReader` for memory efficient reading of large
+  files. The `SwanSpcReader` now uses this class to read spectrum
+  files with a minimum required number of lines in memory at each
+  point in the reading procedure.
+
+* Added support for the `ZERO` keyword in SWAN spectrum files. `ZERO`
+  now results in zeros, while `NODATA` results in NaN values.
 
 Bug fixes
 ^^^^^^^^^