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gis-workflows

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Geographic information systems in practice — projections, spatial joins, raster analysis, and publication-quality maps.

skills/gis-workflows/SKILL.md

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## Overview

GIS turns coordinates into insight: where things are, what overlaps what,
and how patterns change across space. This skill covers the practical
core — coordinate reference systems, vector/raster data models, spatial
joins and overlays, terrain analysis, and producing maps that communicate
honestly — using QGIS and Python (geopandas, rasterio).

## When to use

- Mapping field samples, survey results, or sensor locations
- Overlaying geology, land use, hydrology, or hazard layers for site selection
- Computing areas, distances, densities, and accessibility on real terrain
- Building terrain products: slope, aspect, watersheds from a DEM
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