james-willis commented on code in PR #749:
URL: https://github.com/apache/sedona-db/pull/749#discussion_r3196710192
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rust/sedona-schema/src/raster.rs:
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@@ -55,32 +54,37 @@ impl RasterSchema {
)))
}
- /// Individual band schema
+ /// Individual band schema — flattened N-D band with dimension metadata
pub fn band_type() -> DataType {
DataType::Struct(Fields::from(vec![
- Field::new(column::METADATA, Self::band_metadata_type(), false),
- Field::new(column::DATA, Self::band_data_type(), false),
+ Field::new(column::NAME, DataType::Utf8, true),
+ Field::new(column::DIM_NAMES, Self::dim_names_type(), false),
+ Field::new(column::SHAPE, Self::shape_type(), false),
+ Field::new(column::DATATYPE, DataType::UInt32, false),
+ Field::new(column::NODATA, DataType::Binary, true),
+ Field::new(column::STRIDES, Self::strides_type(), false),
+ Field::new(column::OFFSET, DataType::UInt64, false),
+ Field::new(column::OUTDB_URI, DataType::Utf8, true),
+ Field::new(column::DATA, DataType::BinaryView, false),
Review Comment:
done: added a concept of views that will be fleshed out in a subsequent PR:
each dimension has start, step (step size) and (number of ) steps. This lets us
logically describe the crop and enables reversing dimensions and boardcasting.
The next PR after this will implement that functionality.
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