For the uninitiated, SAS.Planet is a free, open-source (though source-available) GIS viewer that downloads, caches, and stitches map tiles from hundreds of online sources (Google, Bing, ESRI, Yandex, OpenStreetMap, Sentinel, etc.) for offline use. It’s indispensable for travelers, geocachers, hunters, disaster responders, and anyone working without reliable internet.

SAS.Planet is a free, open-source program for viewing, downloading, and stitching satellite imagery, topographic maps, and hybrid layers from dozens of online sources (Google Maps, Bing, ESRI, Yandex, OpenStreetMap, etc.). Unlike web-based viewers, SAS.Planet allows offline use, high-resolution downloading, georeferencing, and GIS-style overlays.

Experienced users often prefer nightly (development) builds over stable releases because nightlies include:

However, the string you provided – sasplanetnightly24121310698x647z better – appears to be nonsensical or corrupted. Legitimate nightly builds follow a predictable naming pattern, e.g.:

The extra x647z and the word "better" suggest either a typo, an internal testing tag, or an altered file from an untrusted source. Never download SAS.Planet from unofficial mirrors or obscure file-sharing sites. Malicious actors sometimes inject adware or keyloggers into renamed versions.

A hidden "better" feature: export downloaded mosaics as:

Since "better" is subjective, here are concrete ways to improve your SAS.Planet usage, whether you stick with stable or nightly builds.