1 Introduction
2 The data
2.1 IRSF/SIRIUS point source catalog
2.2 Sample selection
3 Method
3.1 Measuring $A_{V}$ for each star
3.2 Calculation of $A_{V}$ distribution
3.3 $A_{V}$ scatter caused by photometric errors
3.4 Extinction along the line of sight
3.5 Uncertainties of dust extinction
4 Result
4.1 Results for the individual lines of sight
4.2 Extinction map along the line of sight
5 Comparison of dust extinction with $N({\mathsf{H}})$
5.1 Gas tracer
5.2 $A_{V}$ vs. $N({\mathsf{H}})$ correlation
5.3 Decomposition of $A_{V}$ into different velocities
6 Discussion
6.1 Large-scale dust geometry
6.2 Comparison of dust extinction with dust emission the LMC
6.3 Dust/gas ratio and CO-to $\cdot\mathrm{H}_{2}$ conversion factor
7 Conclusion