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      "title": "Extract values from a raster time series at points in space and time",
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    {
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      "title": "A reader function with no data behind it",
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    {
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        "A series with no files behind it",
        "Extracting values",
        "Interpolating in time and in space",
        "Points outside the series",
        "The reader contract",
        "Writing a reader without the flag",
        "A real collection",
        "Reading slices in parallel"
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