readfile: support float16 data type via gdal (#1483)

* Add support for float16 data type in `readfile.py`, because for GDAL >= 3.11 you will run into `Key 15` error when trying to read float16 format files

* writefile.write(): add float16 in the supported data types

---------

Co-authored-by: Zhang Yunjun <yunjunz@outlook.com>

Author: sssangha

src/mintpy/utils/readfile.py

@@ -138,6 +138,7 @@
     12: 'uint64',
     13: 'int64',
     14: 'int8',         # GDAL >= 3.7
+    15: 'float16',      # GDAL >= 3.11
 }
 
 DATA_TYPE_NUMPY2GDAL = {
@@ -155,6 +156,7 @@
     "uint64"    : 12,   # GDT_UInt64 (GDAL >= 3.5)
     "int64"     : 13,   # GDT_Int64  (GDAL >= 3.5)
     "int8"      : 14,   # GDT_Int8   (GDAL >= 3.7)
+    "float16"   : 15,   # GDT_Float16 (GDAL >= 3.11)
 }
 
 # 3 - ISCE

src/mintpy/utils/writefile.py

@@ -209,7 +209,8 @@ def write(datasetDict, out_file, metadata=None, ref_file=None, compression=None,
         elif fext == '.msk':
             meta['DATA_TYPE'] = 'int8'
 
-        data_types = ['bool', 'int8', 'uint8', 'int16', 'float32', 'float64', 'complex32', 'complex64', 'complex128']
+        data_types = ['bool', 'int8', 'uint8', 'int16', 'float16', 'float32',
+                      'float64', 'complex32', 'complex64', 'complex128']
         if meta['DATA_TYPE'] not in data_types:
             msg = 'Un-supported file type "{}" with data type "{}"!'.format(fext, meta['DATA_TYPE'])
             msg += f'\nSupported data type list: {data_types}'