> For the complete documentation index, see [llms.txt](https://horus-make-sense.gitbook.io/documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://horus-make-sense.gitbook.io/documentation/legacy/citymapper/post-processing.md).

# Post-Processing

The recordings that come from the recording system have raw positions, these are generally inaccurate. To get the positions down to centimeter-level accuracy, post-processing is required.

If you have an RTK or RTX subscription on the recording vehicle, then post-processing might not be required, in POSPac you are still able to verify the accuracy of the captured data. Go to [this page](/documentation/legacy/citymapper/post-processing/verifying-accuracy-of-the-data.md) on how to verify the data.