Add new spatial foundational types #219
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jp-dark
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johnkerl,
aaronwolen,
ivirshup and
bkmartinjr
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Is there a draft set of changes to the abstract spec detailing the new foundational types (e.g., PointCloud)?
(similar question for the composed types introduced or modified in #220 and #221)
In particular, the SpatialDataFrame introduces some significant new concepts, such as an object that is indexed by something other than a joinid. We need to document these concepts and nail down terminology.
- Add new MultiscaleImage - Add new SpatialDataframe abstract base class - Add PointCloud subclass of the SpatialDataFrame - Add GeometryDataFrame subclass of the SpatialDataFrame - Add shapely as a dependency
* Update docstrings * Add ValueError error messages in `SpatialRead` * Rename method `read_level`->`read_region`
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I added a new (WIP) PR #223 here. It should be moving out of draft form soon. |
Co-authored-by: nguyenv <[email protected]>
The individual implementations may find a shared base class useful, but it doesn't need to be included in the abstract specification.
Using the `value_filter` is a less confusing API.
The name `transform` was misleading.
Clarify that they should be in the same order in the docstring.
Co-authored-by: nguyenv <[email protected]>
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Looks great! I have a few specific comments, questions, and suggestions.
Also wondering if we could/should hold off on adding the GeometryDataFrame class? Unless I'm mistaken, I don't believe it's needed for the spot-based assays we're targeting for the initial release? If we do leave it in, I think the docstrings for PointCloud and GeometryDataFrame should make it clearer how they differ from SOMADataFrame and from each other.
| uri: str, | ||
| *, | ||
| schema: pa.Schema, | ||
| index_column_names: Sequence[str] = (options.SOMA_JOINID, "x", "y"), |
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In the context of point clouds, do you think it makes sense to always index by the defined axes (and joinid) to facilitate efficient spatial queries? User-defined indices make sense for SOMADataFrames, which are more general-purpose, but for PointClouds, it seems like indexing by the axes is the most common use case and what distinguishes a PointCloud from a DataFrame.
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The spatial axes need to be index columns (see doc string), but this is still an argument so there is flexibility with:
- The order of the index columns.
- The option to include or exclude
soma_joinid(or other columns) as index columns.
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| @abc.abstractmethod | ||
| def coordinate_space(self) -> Optional[coordinates.CoordinateSpace]: |
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Should create() have an argument to define the coordinate space at create tiem?
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It's generated from the axis names. We could switch the parameter to coordinate space instead. How would you feel about leaving that as a question for alpha users?
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| class GeometryDataFrame(base.SOMAObject, metaclass=abc.ABCMeta): |
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I think we need to align naming of the PointCloud and GeometryDataFrame classes. Both are essentially specialized DataFrames so the <specialization>DataFrame naming scheme makes sense. Although PointCloudDataFrame is a bit of a mouthful. I don't have strong feelings about which approach we use but I do think we should be consistent, unless there's a good reason not to.
| index_column_names: Sequence[str] = ( | ||
| options.SOMA_JOINID, | ||
| options.SOMA_GEOMETRY, | ||
| ), |
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Here too I'm not sure if we need to allow users to define the index columns on these specialized dataframes.
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Same as above. The user needs to include the geometry as an index column. An error is thrown if they do not. But there is flexibility in the other columns they may want to include.
Co-authored-by: Aaron Wolen <[email protected]>
Co-authored-by: Aaron Wolen <[email protected]>
Co-authored-by: Aaron Wolen <[email protected]>
* Expand PointCloud doc string * Expand GeometryDataFrame docstring * Double back ticks
New classes:
Note: This PR is ready for review, but will be merged after PR #218