# SAS Planet

Very high resolution tiles can be downloaded to cover a small area. The application [SAS Planet](https://www.sasgis.org/sasplaneta/) is one way to obtain such images.

In SAS Planet, select the area you are interested in by coordinates. It is recommended to not exceed an area of 1 degree by 1 degree for zoom 15 for example.

Keep in mind that Tacview supports [grid-based texture tiles](/tacview/customization/terrain/terrain-textures/grid-based-texture-tiles.md) of 1 degree by 1 degree or [custom texture maps](https://github.com/RaiaSoftwareInc/tacview.documentation/blob/main/customization/terrain/custom-texture-maps.md) of any size (subject to system limitations).

Notice that SAS Planet asks you to select your coordinates by entering the upper-left corner to lower-right corner of the area you are interested in. If using grid-based texture tiles, Tacview requires tiles named like `N06E099` where (6,99) is the latitude, longitude coordinates of the lower-left corner.

![SAS Planet - Select by Coordinates](/files/NmZzMwBh3mhg7r0P5WTW)

![SAS Planet - Select by Coordinates](/files/MhtmGACQ3WWnITrsZIjd)

Choose a Map/Overlay layer such as `Satellite (Google maps)` and a zoom level such as `15`, and click `Start` to launch the download. It is best to `overwrite old tiles` unless you are sure that all the tiles in your cache are good.

![SAS Planet - Choose Map and Zoom](/files/zoDPDJ1M3NRXOtbcYGLM)

If you wish to have extra details such as labels, you may next proceed to download a second layer such as `Hybrid (Google)` in this example:

![SAS Planet - Choose Overlay](/files/1OSTpxLjrZLBdHszprE9)

When the download is complete, go to the `Stitch` tab (if the window closed, re-open it by pressing `CTRL+B`)

* Save to `%ProgramData%\Tacview\Data\Terrain\Textures\`
* Map: `Satellite (Google maps)`
* Overlay layer: `Hybrid (Google)` or `No`
* Projection: `Geographic (Latitude/Longitude) / WGS84 / EPSG:4326`
* Zoom: `15`
* Quality: `95%`

Click `Start`.

![SAS Planet - Stitch](/files/RJoaKoYbp88gdgA39cLa)

If the layers are in Russian, the native language of the program, go to `Settings` -> `Layer Settings` -> `Hybrid (Google)` and remove any language indication in the URL.

Your high-resolution satellite image has been downloaded to `%ProgramData%\Tacview\Data\Terrain\Textures\`.

![SAS Planet Zoom 15](/files/euoeyHW3ao1rd13ggbRL)

If the image is a 1 degree by 1 degree tile following Tacview's naming convention, Tacview will display it automatically.

If your image is a custom size, integrate it into Tacview as a [custom texture map](https://github.com/RaiaSoftwareInc/tacview.documentation/blob/main/customization/terrain/custom-texture-maps.md).

### Even Higher Resolution

To have even high resolution over a very small area, perhaps for taking screenshots, you may wish to download, say, a 1 degree by 1 degree area of Zoom 15 satellite resolution and within that area display a much smaller area of Zoom 18 satellite resolution.

A 1 degree by 1 degree tile can always be displayed by tacview by following the procedure for [grid-based elevation tiles](/tacview/customization/terrain/terrain-elevation/grid-based-elevation-tiles.md). But when multiple custom texture maps are used, make sure the smaller, higher-resolution tile is listed in [your custom texture XML file](https://github.com/RaiaSoftwareInc/tacview.documentation/blob/main/customization/terrain/custom-texture-maps.md) after the larger, lower-resolution one - the textures are loaded in the order they appear in the file.

![SAS Planet - Zoom 18](/files/3TadiELvxlP4ZSzb7YMz)


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