bug: geozero null values are coerced to "null"

[deanm0000]

I downloaded this geojson but I can't open it.

I get PanicException: Trying to insert a column value null in the wrong type column Float64(PrimitiveBuilder { values_builder: BufferBuilder { buffer: MutableBuffer { data: 0x30ffc80, len: 8, layout: Layout { size: 64, align: 128 (1 << 7) } }, len: 1, _marker: PhantomData<f64> }, null_buffer_builder: NullBufferBuilder { bitmap_builder: Some(BooleanBufferBuilder { buffer: MutableBuffer { data: 0x303a480, len: 1, layout: Layout { size: 64, align: 128 (1 << 7) } }, len: 1 }), len: 0, capacity: 1 }, data_type: Float64 })

[kylebarron]

Thanks! I'll take a look!

[kylebarron]

Well, the issue here is that geozero doesn't have a null variant in their type system, so they cast any null GeoJSON value to the string "null". So you have a column that starts off with float numeric values, but then has null values, so I'm trying to add the string "null" to a float column. This is a significant problem.

I don't really want to scan every input value for the string "null". I created georust/geozero#206 for discussion, which would solve this problem.

In any case, you can use read_pyogrio to read the GeoJSON using GDAL instead of geozero.