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Known Issues
Please also have a look at the FAQ, there might be a solution to your issue there. We encourage you to contribute to this repository if you have a solution to these issues:
The ROS-free launch of maplab (using the -ros_free flag) is currently not working.
Building maplab will download and check-out dependencies, which can be very slow depending on the speed of you internet connection. A more detailed answer can be found in the FAQ.
The console will crash if gflags (except bool gflags) are provided with no argument, e.g. load --map_folder rather than load --map_folder my_folder.
We observed that with higher GCC versions there can be build errors or even segfaults. E.g. this issue https://github.com/ethz-asl/maplab/issues/30. Try compiling with the default Ubuntu 14.04/16.04 versions of GCC, these are being tested by our build server.
If ROVIOLI produces extremely sparse (in terms of number of vertices) maps, make sure you are not trying to build a map from a multi-camera system where the individual cameras are not triggered at the same time. ROVIOLI will try to create VisualNFrames where all images have been taken at the same time, which might happen very rarely or not at all, hence, leading to sparse VIMaps.
Related Issues: #49