The Houston-Harris County Wall Map by Key Maps, Inc. measures a whopping 79" x 56" Drawn using the same grid as Key Maps' Atlases
, and includes street level detail. Other details include zip codes, city limits and subdivision names. Updated for 2018.
Coverage area includes Houston, Sugar Land, Richmond, Katy, Baytown, Cypress, Tomball, Jersey Village, Pearland and Humble.