[QGIS-Developer] Compatibility between 2.99 project files and 2.18

[Nyall Dawson]

On 24 November 2017 at 14:10, Patrick Dunford <enzedrailmaps at gmail.com> wrote:
> As of the moment I'm finding that 2.18 has difficulty correctly detecting
> the CRS from a project file saved from the latest master. Generally
> EPSG:3857 is detected as EPSG:4326
>
> Given the master is still a development version is this considered a bug in
> 2.18 or is there still a process of defining the 3.0 project file format to
> the point where it is reasonably compatible with older versions.

Bad news: There is ZERO compatibility with QGIS 2.x. Moving QGIS
projects to 3.0 is a one-way street.

Nyall