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Change ODR link to the wise-allwise page
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tutorials/parquet-catalog-demos/wise-allwise-catalog-demo.md

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## Introduction
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This notebook demonstrates access to the [HEALPix](https://ui.adsabs.harvard.edu/abs/2005ApJ...622..759G/abstract)-partitioned (order 5), [Apache Parquet](https://parquet.apache.org/) version of the [AllWISE Source Catalog](https://wise2.ipac.caltech.edu/docs/release/allwise/expsup/sec1_3.html#src_cat).
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The catalog is available through the [AWS Open Data](https://aws.amazon.com/opendata) program, as part of the [NASA Open-Source Science Initiative](https://science.nasa.gov/open-science-overview).
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The catalog is available through the [AWS Open Data](https://registry.opendata.aws/wise-allwise/) program, as part of the [NASA Open-Source Science Initiative](https://science.nasa.gov/open-science-overview).
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Access is free and no special permissions or credentials are required.
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Parquet is convenient for large astronomical catalogs in part because the storage format supports efficient database-style queries on the files themselves, without having to load the catalog into a database (or into memory) first.

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