parse all numbers as Float64 when reading JSON

This will avoid problems with coordinates like 1 or 1.0 being converted to Int. This also affects the properties, so integer columns will now be Float64, and will need to be manually converted to integer types.

Author: visr

Project.toml

@@ -17,7 +17,7 @@ Extents = "0.1"
 GeoFormatTypes = "0.4"
 GeoInterface = "1"
 GeoInterfaceRecipes = "1"
-JSON3 = "1"
+JSON3 = "1.12"
 Tables = "1"
 julia = "1.6"
 

src/json.jl

@@ -5,7 +5,7 @@
 Read a GeoJSON string to a GeoInterface.jl compatible feature or geometry object.
 """
 function read(source)
-    object = JSON3.read(source)
+    object = JSON3.read(source; numbertype = Float64)
     if object === nothing
         error("JSON string is empty")
     end

test/geojson_samples.jl

@@ -487,6 +487,8 @@ geom_collection = """{
     }]
 }"""
 
-geometries = [multi, bbox, bbox_z, bermuda_triangle, geom_collection]
+point_int = """{"type":"Point","coordinates":[1,2]}"""
+
+geometries = [multi, bbox, bbox_z, bermuda_triangle, geom_collection, point_int]
 
 end  # module test

test/runtests.jl

@@ -234,7 +234,7 @@ include("geojson_samples.jl")
         @test t[1] isa GeoJSON.Feature
         @test t.geometry isa Vector{Union{T,Missing}} where {T<:GeoJSON.Point}
         @test ismissing(t.geometry[3])
-        @test t.a isa Vector{Union{Int,Missing}}
+        @test t.a isa Vector{Union{Float64,Missing}}
         @test isequal(t.a, [1, missing, 3])
         @test t.b isa Vector{Missing}
         @test Tables.columntable(t) isa NamedTuple
@@ -280,6 +280,17 @@ include("geojson_samples.jl")
         @test p isa GeoJSON.Point
     end
 
+    @testset "numbertype" begin
+        # all numbers are Float64 since we use numbertype=Float64
+        p = GeoJSON.read(T.point_int)
+        @test p isa GeoJSON.Point
+        coords = GeoJSON.coordinates(p)
+        @test coords isa JSON3.Array
+        @test eltype(coords) == Float64
+        @test coords == [1, 2]
+        @test copy(coords) isa Vector{Float64}
+    end
+
     Aqua.test_all(GeoJSON)
 
 end  # testset "GeoJSON"