I have a Shallow whole genome sequencing data set and aligned that using bwa. I am trying to visualize the data on the UCSC. first I made wig file but they are so big to be uploaded then I made bedgraph file and managed to upload them on the UCSC but the coverage is so low. here you find a screenshot of the UCSC. do you know what the problem is or how I can make a better visualization of reads on the genome.