# Establishing the Satellite Baseline

## Module Overview

This is where **Anchor 1** gets built. You'll take satellite imagery and turn it into a Blender scene at 1:1 real-world scale: origin at the site's true coordinates, 1 unit = 1 meter, and a ground plane you can trust. From here on, every measurement you take is a real measurement.

**Shared reference module:** read [Measurements, Scale & Dimension](../../../techniques/1-foundation-preparation/measurements.md) alongside this module — it is woven into the sidebar flow for this reason.

## The Video

[TODO: 2–3 sentence intro to what the walkthrough covers and what to watch for while viewing.]

## Satellite Imagery as a Baseline

[TODO: source selection — resolution, freshness, coverage; free sources; what good and bad imagery looks like for this purpose.]

## Georeferenced Anchoring in Blender

[TODO: importing with BlenderGIS / Blosm; setting the scene origin to real coordinates; why the origin matters for sharing work.]

## The 1:1 Convention

[TODO: 1 unit = 1 meter; checking the scale before modeling; how a wrong scale silently corrupts every downstream measurement — see the shared Measurements module in the sidebar.]

## Knowledge Check

[TODO: 3 questions — e.g. why freshness matters for a conflict site; what to verify before trusting a baseline; what happens to measurements if the baseline is off by 5%.]

## Summary

[TODO: one paragraph.]

## KB References

- [Measurements, Scale & Dimension](../../../techniques/1-foundation-preparation/measurements.md) — shared reference module (sidebar)
- [BlenderGIS](../../../addons/blendergis.mdx) — satellite/map import into Blender
- [Blosm](../../../addons/blosm.mdx) — slippy-map background plugin
- [QGIS](../../../tools/QGIS/index.md) — offline satellite prep and [Global Building Atlas](../../../tools/QGIS/6-global-building-atlas.md) building footprints
- [Google Earth Pro](../../../tools/google-earth-pro.md) — quick imagery access and rough measurements