> For the complete documentation index, see [llms.txt](https://raia-software-inc.gitbook.io/tacview/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://raia-software-inc.gitbook.io/tacview/customization/terrain/terrain-elevation.md).

# Terrain Elevation

The terrain elevation of Tacview is made of layers. From the lowest resolution (ETOPO1) to the highest resolution (SRTM1), Tacview engine automatically displays the most appropriate level of detail depending on current zoom level and data available.

The ETOPO1 worldwide base map is a feature of Tacview Standard and above. You can customize your terrain data by adding higher-resolution [grid-based elevation tiles](/tacview/customization/terrain/terrain-elevation/grid-based-elevation-tiles.md) or [elevation maps](/tacview/customization/terrain/terrain-elevation/elevation-maps.md).