Fig 4.

a) Deviation in x- and y-direction. Depicted are the deviation in the respective direction divided by the radius, i.e. $\frac{x^{\prime }-x}{r}$. Each blue dot represents a CS annotation ${\mathcal{A}}^C$ of the Citizen Science Primer-experiment $\mathcal{C}\mathcal{S}\mathcal{P}$. Please note that five outliers are not depicted in favor of a more detailed visualization. The red cross is just for orientation and depicts no deviation at all. b) Overlap displays the overlap of the expert annotation with the CS annotation. Relative radius $\frac{r^{\prime }}{r}$ is the ratio of the radius r′ of the CS annotation and the radius r of the expert annotation. c) and d) show the same information on the same scale as a) and b) respectively but are protocol-corrected (see section Results for more details). e) and f) show the results for the Citizen Science Study $\mathcal{C}\mathcal{S}\mathcal{S}$. Each dot represents a CS annotation ${\mathcal{A}}^C$ of the $\mathcal{C}\mathcal{S}\mathcal{S}.$.