Fix geod_inverse argument order (#107)

Fixes #105

src/geod.jl

@@ -34,7 +34,7 @@ function geod_inverse(g::geod_geodesic, lat1::Real, lon1::Real, lat2::Real, lon2
     azi1 = Ref{Cdouble}(NaN)
     azi2 = Ref{Cdouble}(NaN)
 
-    geod_inverse(Ref(g), lat1, lat2, lon1, lon2, s12, azi1, azi2)
+    geod_inverse(Ref(g), lat1, lon1, lat2, lon2, s12, azi1, azi2)
 
     return s12[], azi1[], azi2[]
 end

test/libproj.jl

@@ -479,7 +479,7 @@ end
     # Maybe enable later, based on https://github.com/JuliaGeo/GeoFormatTypes.jl/issues/21
     # @test convert(GFT.ProjString, gftcrs) == GFT.ProjString("+proj=longlat +datum=WGS84 +no_defs +type=crs")
 
-    # Check that we can round trip CRS/wkt without errors 
+    # Check that we can round trip CRS/wkt without errors
     @test GFT.EPSG(Proj.CRS(GFT.WellKnownText(crs))) ==
           GFT.EPSG(Proj.CRS(GFT.WellKnownText2(crs)))
 
@@ -495,8 +495,10 @@ end
     lat1, lon1, lat2, lon2 = 40.64, -73.78, 1.36, 103.99
 
     @test_nowarn geod = Proj.geod_geodesic(6378137, 1 / 298.257223563)
+    # the azi1 and s12 values were computed directly
+    azi1, s12 = 3.3057734780176125, 1.534751294051294e7
     @test_nowarn direct_line =
-        Proj.geod_directline(geod, lat1, lon1, 3.3057734780176125, 1.534751294051294e7) # the azi1 and s13 values were computed directly
+        Proj.geod_directline(geod, lat1, lon1, azi1, s12)
     @test_nowarn inverse_line = Proj.geod_inverseline(geod, lat1, lon1, lat2, lon2)
 
     @test begin
@@ -523,6 +525,11 @@ end
         lats, lons = Proj.geod_path(geod, lat1, lon1, lat2, lon2, 2)
         lats[1] ≈ lat1 && lats[2] ≈ lat2 && lons[1] ≈ lon1 && lons[2] ≈ lon2
     end
+
+    @test begin
+        s12_, azi1_, azi2_ = Proj.geod_inverse(geod, lat1, lon1, lat2, lon2)
+        s12 ≈ s12_ && azi1 ≈ azi1_
+    end
 end
 
 @testset "GeoInterface" begin