Philadelphia property taxes

[Kofi Quaye]

Hello, I am trying to analyze some rental properties in my area. I am trying to figure out the annual Property Taxes for certain properties. I went to http://property.phila.gov/

This website shows the Market Value, Taxable Land, and Taxable improvement. Can someone explain what these numbers mean and which number I should use for my rental property analysis if any?

The numbers on the tax assessors page are different from the number on realtor.com. Which number should I use for my analysis?