r.watersheds: Add one more example using bridges vector (#1262)

src/raster/r.watersheds/main.c

@@ -61,7 +61,7 @@ int main(int argc, char *argv[])
     G_add_keyword(_("watershed delineation"));
     module->description = _("Delineates a large number of watersheds using the "
                             "Memory-Efficient Watershed Delineation (MESHED) "
-                            "OpenMP parallel algorithm by Cho (2024).");
+                            "OpenMP parallel algorithm by Cho (2025).");
 
     opt.dir = G_define_standard_option(G_OPT_R_INPUT);
     opt.dir->key = "direction";

src/raster/r.watersheds/r.watersheds.html

@@ -36,7 +36,7 @@ <h2>NOTES</h2>
 
 <h2>EXAMPLES</h2>
 
-This example uses the North Carolina sample dataset.
+These examples use the North Carolina sample dataset.
 
 <p>Calculate flow accumulation using <em>r.watershed</em> and delineate all
 watersheds from draining cells using <em>r.watersheds</em>:
@@ -64,7 +64,23 @@ <h2>EXAMPLES</h2>
 </pre></div>
 
 <div align="center">
-<img src="r_watersheds_nc_example.png">
+<img src="r_watersheds_wsheds.png">
+</div>
+
+<p>Perform the same analysis for 10,938 bridges in North Carolina:
+<div class="code"><pre>
+# set computational region
+g.region -ap raster=elev_state_500m
+
+# calculate drainage directions using r.watershed
+r.watershed -s elevation=elev_state_500m drainage=drain_state
+
+# delineate all watersheds using r.watersheds
+r.watersheds dir=drain_state outlets=bridges output=bridge_wsheds nproc=$(nproc)
+</pre></div>
+
+<div align="center">
+<img src="r_watersheds_bridge_wsheds.png">
 </div>
 
 <h2>SEE ALSO</h2>