Update ash_animator/basemaps.py

ash_animator/basemaps.py

@@ -1,36 +1,5 @@
-import tempfile
-
-# import contextily as ctx
-# from mpl_toolkits.basemap import Basemap
-# import cartopy.crs as ccrs
-# import cartopy.feature as cfeature
-
-# def draw_etopo_basemap(ax, mode="basemap", zoom=7):
-#     try:
-#         if mode == "stock":
-#             ax.stock_img()
-#         elif mode == "contextily":
-#             extent = ax.get_extent(ccrs.PlateCarree())
-#             ax.set_extent(extent, crs=ccrs.PlateCarree())
-#             ctx.add_basemap(ax, crs=ccrs.PlateCarree(), source=ctx.providers.CartoDB.Voyager, zoom=zoom)
-#         elif mode == "basemap":
-#             extent = ax.get_extent(ccrs.PlateCarree())
-#             m = Basemap(projection='cyl',
-#                         llcrnrlon=extent[0], urcrnrlon=extent[1],
-#                         llcrnrlat=extent[2], urcrnrlat=extent[3],
-#                         resolution='h', ax=ax)
-#             m.shadedrelief()
-#             m.drawcoastlines(linewidth=0.5)
-#             m.drawcountries(linewidth=0.7)
-#             m.drawmapboundary()
-#         else:
-#             raise ValueError(f"Unsupported basemap mode: {mode}")
-#     except Exception as e:
-#         print(f"[Relief Error - {mode} mode]:", e)
-#         ax.add_feature(cfeature.LAND)
-#         ax.add_feature(cfeature.OCEAN)
-
 import os
+import tempfile
 import hashlib
 import contextily as ctx
 from mpl_toolkits.basemap import Basemap
@@ -39,15 +8,17 @@ import cartopy.feature as cfeature
 from PIL import Image
 import matplotlib.pyplot as plt
 
-# Define cache directories
-# Optional: Set tile cache directory (must be done before contextily downloads tiles)
-os.environ["XDG_CACHE_HOME"] = os.path.expanduser("~/.contextily_cache")
-
-CTX_TILE_CACHE_DIR = os.path.expanduser("~/.contextily_cache")
-os.path.join(tempfile.gettempdir(), 'contextily_cache') = os.path.expanduser("~/.basemap_cache")
+# Use writable temporary directory for tile caching
+CTX_TILE_CACHE_DIR = os.path.join(tempfile.gettempdir(), "contextily_cache")
+BASEMAP_TILE_CACHE_DIR = os.path.join(tempfile.gettempdir(), "contextily_cache")
 
+# Ensure directories exist
 os.makedirs(CTX_TILE_CACHE_DIR, exist_ok=True)
-os.makedirs(os.path.join(tempfile.gettempdir(), 'contextily_cache'), exist_ok=True)
+os.makedirs(BASEMAP_TILE_CACHE_DIR, exist_ok=True)
+
+# Optionally set environment variable for contextily
+os.environ["XDG_CACHE_HOME"] = CTX_TILE_CACHE_DIR
+
 
 def draw_etopo_basemap(ax, mode="basemap", zoom=11):
     """
@@ -67,12 +38,6 @@ def draw_etopo_basemap(ax, mode="basemap", zoom=11):
 
     zoom : int, optional
         Tile zoom level (only for "contextily"). Higher = more detail. Default is 7.
-
-    Notes
-    -----
-    - Uses high resolution for Basemap (resolution='h') and saves figure at 300 DPI.
-    - Cached images are reused using extent-based hashing to avoid re-rendering.
-    - Basemap is deprecated; Cartopy with web tiles is recommended for new projects.
     """
     try:
         if mode == "stock":
@@ -85,22 +50,19 @@ def draw_etopo_basemap(ax, mode="basemap", zoom=11):
                 ax,
                 crs=ccrs.PlateCarree(),
                 source=ctx.providers.CartoDB.Voyager,
-                zoom=zoom                
+                zoom=zoom
             )
 
         elif mode == "basemap":
             extent = ax.get_extent(crs=ccrs.PlateCarree())
-
-            # Create a hash key for this extent
             extent_str = f"{extent[0]:.4f}_{extent[1]:.4f}_{extent[2]:.4f}_{extent[3]:.4f}"
             cache_key = hashlib.md5(extent_str.encode()).hexdigest()
-            cache_file = os.path.join(os.path.join(tempfile.gettempdir(), 'contextily_cache'), f"{cache_key}_highres.png")
+            cache_file = os.path.join(BASEMAP_TILE_CACHE_DIR, f"{cache_key}_highres.png")
 
             if os.path.exists(cache_file):
                 img = Image.open(cache_file)
                 ax.imshow(img, extent=extent, transform=ccrs.PlateCarree())
             else:
-                # Create a high-resolution temporary figure
                 temp_fig, temp_ax = plt.subplots(figsize=(12, 9),
                                                  subplot_kw={'projection': ccrs.PlateCarree()})
                 temp_ax.set_extent(extent, crs=ccrs.PlateCarree())
@@ -108,18 +70,13 @@ def draw_etopo_basemap(ax, mode="basemap", zoom=11):
                 m = Basemap(projection='cyl',
                             llcrnrlon=extent[0], urcrnrlon=extent[1],
                             llcrnrlat=extent[2], urcrnrlat=extent[3],
-                            resolution='f', ax=temp_ax)  # 'h' = high resolution
+                            resolution='f', ax=temp_ax)
 
                 m.shadedrelief()
-                # m.drawcoastlines(linewidth=0.1)
-                # m.drawcountries(linewidth=0.1)
-                # m.drawmapboundary()
 
-                # Save high-DPI figure for clarity
                 temp_fig.savefig(cache_file, dpi=300, bbox_inches='tight', pad_inches=0)
                 plt.close(temp_fig)
 
-                # Load and display the cached image
                 img = Image.open(cache_file)
                 ax.imshow(img, extent=extent, transform=ccrs.PlateCarree())