refactor: another PyPSA v1 deprecation (PyPSA#1858)

* refactor: another PyPSA v1 deprecation

* `0.35.2` compatibility

Author: lkstrp

config/plotting.default.yaml

@@ -6,7 +6,7 @@
 plotting:
   map:
     boundaries: [-11, 30, 34, 71]
-    color_geomap:
+    geomap_colors:
       ocean: white
       land: white
   projection:

doc/configtables/plotting.csv

@@ -1,7 +1,7 @@
 ,Unit,Values,Description
 map,,,
 -- boundaries,°,"[x1,x2,y1,y2]",Boundaries of the map plots in degrees latitude (y) and longitude (x)
--- color_geomap,,,
+-- geomap_colors,,,
 -- -- ocean,--,str,Color of the ocean in the geomap.
 -- -- land,--,str,Color of the land in the geomap.
 projection,,,

doc/release_notes.rst

@@ -114,6 +114,9 @@ PyPSA-Eur v2025.07.0 (11th July 2025)
 * Small plotting improvements.
   (https://github.com/PyPSA/pypsa-eur/pull/1694https://github.com/PyPSA/pypsa-eur/pull/1727)
 
+* The `plotting|map|color_geomap` was renamed to `plotting|map|geomap_colors` to align
+  with the new PyPSA API.
+  
 **Bugfixes and Compatibility**
 
 * Select correct capital costs for floating offshore wind. Previously, the same

scripts/plot_balance_map.py

@@ -175,7 +175,7 @@
         else None,
         ax=ax,
         margin=0.2,
-        color_geomap={"border": "darkgrey", "coastline": "darkgrey"},
+        geomap_colors={"border": "darkgrey", "coastline": "darkgrey"},
         geomap=True,
         boundaries=boundaries,
     )

scripts/plot_gas_network.py

@@ -145,7 +145,7 @@ def plot_ch4_map(n):
         link_colors=pipe_colors["gas pipeline (available)"],
         link_widths=link_widths_rem,
         branch_components=["Link"],
-        color_geomap=False,
+        geomap_colors=False,
         boundaries=map_opts["boundaries"],
     )
 
@@ -155,7 +155,7 @@ def plot_ch4_map(n):
         link_colors=link_color_used,
         link_widths=link_widths_used,
         branch_components=["Link"],
-        color_geomap=False,
+        geomap_colors=False,
         boundaries=map_opts["boundaries"],
     )