Relaxed criteria for uniform grid detection

src/CF.cpp

@@ -256,7 +256,10 @@ Error CF::FillAdapterFromCF(const CLArgs& args, michlib_internal::ParameterListE
   }
 
   // Check uniform and create projection
-  if(CF::CheckUniform(rlons, 0.0005) && CF::CheckUniform(rlats, 0.0005))
+  bool lonuni = CF::CheckUniform(rlons, 0.005);
+  bool latuni = CF::CheckUniform(rlats, 0.005);
+
+  if(lonuni && latuni)
   {
    proj.reset(new Projection(Projection::Create<Projection::Type::EQC>(rlons, rlats)));
    pars.AddParameter("lonstep", (rlons.back() - rlons.front()) / (rlons.size() - 1));
@@ -264,7 +267,8 @@ Error CF::FillAdapterFromCF(const CLArgs& args, michlib_internal::ParameterListE
   }
   else
   {
-   michlib::errmessage("Warning! Nonuniform grid");
+   if(!lonuni) michlib::errmessage("Warning! Nonuniform longitude grid");
+   if(!latuni) michlib::errmessage("Warning! Nonuniform latitude grid");
    proj.reset(new Projection(Projection::Create<Projection::Type::IRREGULARXY>(std::move(rlons), std::move(rlats))));
   }
  }