The big day that Raleigh's city planners have been working toward for several years is coming up on July 7 as the Raleigh city council preps for a public hearing on the re-mapping of about 30 percent of the land parcels within the city. The 7 p.m. meeting on Tuesday will be the public's last chance to give public comment in support or in opposition to the changes that are being proposed under the new Unified Development Ordinance's rezoning districts, which govern land use. The changes are expected…