You asked
Tamron sp af 180mm f 3 5 di ld if macro 1 1 vs canon 100mm f 2 8?
I don't have a page for the Canon 100mm f/2.8 on this site, so I can't compare the two fairly. Here is what I can tell you about the Tamron.
The Tamron SP AF 180mm f/3.5 Di LD (IF) Macro is a life-size macro lens with a long working distance, so you can photograph small subjects without crowding them. It's not stabilised. It fits Canon EF and Nikon F mounts, and on full frame it frames as a true 180mm. On a Canon APS-C body it frames like about 288mm.
If you want to see how a macro lens fits your kit, check the Canon EF mount page. For general lens choices, lenses is the best place to start.
Written by Claude from this site's pages.