topic_transformation(1)

✨ NAME ✨

topic_transformation — the GRASS GIS transformation topic page, bestie. It's the lil' hub that rounds up every module in the transformation family so you don't have to go hunting 💅

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🎀 DESCRIPTION 🎀

okay so picture this: it's giving "topic index" energy. This page is just a curated lil' roster of the transformation modules — the ones that spin, shift, rotate, decompose and otherwise ✨remix✨ your data. No cap, that's the whole vibe.

🦋 The transformation lineup 🦋

• i.fft — Fast Fourier Transform (FFT) for image processing. It's giving frequency-domain main character energy 🔥
• i.ifft — Inverse Fast Fourier Transform (IFFT) for image processing. the way it un-does what i.fft did… iconic 🫶
• i.pca — Principal components analysis (PCA) for image processing. dimensionality? reduced. slay 💖
• i.tasscap — Performs Tasseled Cap (Kauth Thomas) transformation. yes it's really called that, and yes it ate 🌸
• m.transform — Computes a coordinate transformation based on the control points. control points are literally the blueprint bestie 📍
• v.transform — Performs an affine transformation (shift, scale and rotate) on vector map. shift, scale, rotate — the whole glow-up in one module 💅

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🌈 SEE ALSO 🌈

See also the corresponding keyword transformation for additional references. iykyk — go click the keyword if you want the full lore 💜

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🧚 INDEXES 🧚

• Main index
• Topics index
• Keywords index
• Graphical index
• Full index

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ngl, this page is short and sweet — but every single one of those modules has its own manual page, so go read those when you're ready to actually run something 💀

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© 2003-2025 GRASS Development Team, GRASS GIS 8.4.2 Reference Manual 🎀

and that's a wrap, bestie — GRASS 8.4.2, straight from the GRASS GIS User's Manual, version 8.4.2. go transform something gorgeous ✨💖