Add enums GridFormat for GMT grid format ID

doc/_templates/autosummary/class.rst

@@ -8,8 +8,10 @@
 .. rubric:: Attributes
 
 {% for item in attributes %}
-.. autoproperty::
+{% if item not in inherited_members %}
+.. autoattribute::
     {{ objname }}.{{ item }}
+{% endif %}
 {% endfor %}
 {% endif %}
 

doc/api/index.rst

@@ -242,6 +242,14 @@ In addition, there is also a special function to load XYZ tile maps via
 
 .. currentmodule:: pygmt
 
+Enumerations
+------------
+
+.. autosummary::
+    :toctree: generated
+
+    enums.GridFormat
+
 Exceptions
 ----------
 

pygmt/datatypes/header.py

@@ -6,6 +6,7 @@
 from typing import Any, ClassVar
 
 import numpy as np
+from pygmt.enums import GridFormat
 
 # Constants for lengths of grid header variables.
 #
@@ -203,7 +204,14 @@ def data_attrs(self) -> dict[str, Any]:
         Attributes for the data variable from the grid header.
         """
         attrs: dict[str, Any] = {}
-        attrs["Conventions"] = "CF-1.7"
+        if self.type in {
+            GridFormat.NB,
+            GridFormat.NS,
+            GridFormat.NI,
+            GridFormat.NF,
+            GridFormat.ND,
+        }:  # Only set the 'Conventions' attribute for netCDF.
+            attrs["Conventions"] = "CF-1.7"
         attrs["title"] = self.title.decode()
         attrs["history"] = self.command.decode()
         attrs["description"] = self.remark.decode()

pygmt/enums.py

@@ -0,0 +1,39 @@
+"""
+Enumerations for PyGMT.
+"""
+
+from enum import IntEnum
+
+
+class GridFormat(IntEnum):
+    """
+    Enum for the GMT grid format ID.
+
+    These enums are defined in 'gmt_grdio.h'.
+    """
+
+    UNKNOWN = 0  #: Unknown grid format
+    BF = 1  #: GMT native, C-binary format (32-bit float)
+    BS = 2  #: GMT native, C-binary format (16-bit integer)
+    RB = 3  #: SUN rasterfile format (8-bit standard)
+    BB = 4  #: GMT native, C-binary format (8-bit integer)
+    BM = 5  #: GMT native, C-binary format (bit-mask)
+    SF = 6  #: Golden Software Surfer format 6 (32-bit float)
+    CB = 7  #: GMT netCDF format (8-bit integer, depreciated)
+    CS = 8  #: GMT netCDF format (16-bit integer, depreciated)
+    CI = 9  #: GMT netCDF format (32-bit integer, depreciated)
+    CF = 10  #: GMT netCDF format (32-bit float, depreciated)
+    CD = 11  #: GMT netCDF format (64-bit float, depreciated)
+    RF = 12  #: GEODAS grid format GRD98 (NGDC)
+    BI = 13  #: GMT native, C-binary format (32-bit integer)
+    BD = 14  #: GMT native, C-binary format (64-bit float)
+    NB = 15  #: GMT netCDF format (8-bit integer)
+    NS = 16  #: GMT netCDF format (16-bit integer)
+    NI = 17  #: GMT netCDF format (32-bit integer)
+    NF = 18  #: GMT netCDF format (32-bit float)
+    ND = 19  #: GMT netCDF format (64-bit float)
+    SD = 20  #: Golden Software Surfer format 7 (64-bit float, read-only)
+    AF = 21  #: Atlantic Geoscience Center format AGC (32-bit float)
+    GD = 22  #: Import through GDAL
+    EI = 23  #: ESRI Arc/Info ASCII Grid Interchange format (ASCII integer)
+    EF = 24  #: ESRI Arc/Info ASCII Grid Interchange format (ASCII float)