g.gui.mapswipe(1)

📦
version 8.4.2 · 10 versions
, in fedora 44

g.gui.mapswipe 💖✨

okay bestie, welcome to the GRASS GIS User's Manual page for g.gui.mapswipe (that's the (1) up in the corner, iykyk) 🎀

🌸 NAME 🌸

g.gui.mapswipe — literally lets you compare two maps interactively by swiping a visibility bar 🫶

🦋 KEYWORDS 🦋

general, GUI, display

✨ SYNOPSIS ✨

g.gui.mapswipe
g.gui.mapswipe --help
g.gui.mapswipe  [first=name]   [second=name]   [mode=string]   [--help]
[--verbose]  [--quiet]  [--ui]

🎀 Flags:

  • --help — prints the usage summary, so you're never lost fr fr
  • --verbose — verbose module output, she's chatty 💅
  • --quiet — quiet module output, she's not
  • --ui — force launching the GUI dialog, no cap

🍓 Parameters:

  • first=name — First (top/right) raster map 👑
  • second=name — Second (bottom/left) raster map 🌈
  • mode=string — View mode
    • Options: swipe, mirror
    • Default: swipe
    • swipe: swiping the upper map layer to show the map layer below
    • mirror: synchronized maps side by side

💜 DESCRIPTION 💜

The Map Swipe is a wxGUI component which allows the user to interactively compare two raster maps of the same area by revealing different parts of the raster maps. It is useful e.g. for comparing raster maps from different time periods. Map Swipe can be launched from the menu File -> Map Swipe. Iconic.

Map Swipe allows you to:

  • switch orientation of the swipe line (horizontal or vertical) 🔄
  • zooming, panning 🔍
  • automatically load maps when opening Map Swipe with two selected raster maps in Layer Manager 🪄
  • compare 2 raster maps or load different combinations of raster and vector maps and set transparency (advanced mode) 💫
  • save display to graphics file 💾
  • display text labels with map names 🏷️
  • choose between 'swipe' mode (default) and 'mirror' mode (synchronized maps displayed side by side) 🪞
  • change the appearance of cursor in 'mirror' mode (available in Map Swipe settings) 🖱️

Pre and post disaster images of the tsunami in Japan in 2011. The upper MODIS image taken on February 26, 2011, shows the coastline under normal conditions while the lower MODIS image on March 13, 2011, shows a clear view of tsunami flooding along the coastline. Water, black and dark blue in these false-color images, still covers the ground as much as five kilometers (three miles) from the coast. Source: Earth Observatory/NASA 🌊😭

👀 SEE ALSO 👀

wxGUI, wxGUI components

See also the user wiki page. 🧚

🌟 AUTHOR 🌟

Anna Kratochvilova, Czech Technical University in Prague, Czech Republic 💖

🔥 SOURCE CODE 🔥

Available at: wxGUI Map Swipe source code (history)

Accessed: Saturday Jan 17 05:42:35 2026 ⏰

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

and that's the whole page bestie, no cap, every single flag accounted for 💅 — this was the g.gui.mapswipe(1) page from GRASS 8.4.2</>, accessed Saturday Jan 17 05:42:35 2026, and yes the footer said GRASS 8.4.2 too because she's consistent like that 🫶✨ periodt 🎀

📦 where this page comes from