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Copy file name to clipboardExpand all lines: tutorials/zenodo_isamples_analysis.qmd
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theme: cosmo
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##Introduction
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# Introduction
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This tutorial demonstrates how to efficiently analyze large geospatial datasets directly in your browser without downloading entire files. We'll use DuckDB-WASM and Observable JS to perform fast, memory-efficient analysis and create interactive visualizations.
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**Note**: This tutorial attempts to connect to the live iSamples dataset (~300MB, 6+ million records). If CORS restrictions prevent access to the remote file, it automatically falls back to a representative demo dataset that demonstrates the same analytical techniques.
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###Key Technologies
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## Key Technologies
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-**DuckDB-WASM**: In-browser analytical database with HTTP range request support
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-**Observable Plot**: Grammar of graphics for interactive visualizations
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-**Observable Inputs**: Interactive controls for data exploration
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-**CORS Handling**: Automatic fallback for cross-origin restrictions
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###Dataset Information
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## Dataset Information
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**Primary dataset**:
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-**URL**: `https://labs.dataunbound.com/docs/2025/07/isamples_export_2025_04_21_16_23_46_geo.parquet`*(temporary for testing)*
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-**Size**: 10K records with same schema and representative geographic distribution
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-**Purpose**: Demonstrates all analytical techniques with faster loading
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