MOUNT PLEASANT — Parent Jennifer Clements felt furious when she saw how the new proposed attendance lines would affect her two children.

She didn’t understand why her section of the Planter’s Pointe subdivision was rezoned to Jennie Moore Elementary while two of its other sections would stay at Laurel Hill Primary or Pinckney Elementary. School officials have said they wanted to keep neighborhoods together.

“We’re the only ones not in there,” she said. “I don’t know how they can leave one neighborhood out. I’m hoping it’s an oversight.”

Many parents such as Clements got their first look Monday afternoon at the new proposed attendance lines for elementary and middle schools.

Charleston County school leaders had promised to provide those last week, but that didn’t happen because of additional changes to its online format requested by the District 2 (East Cooper) constituent school board, said Jason Sakran, spokesman for Charleston County School District.

The constituent school board approved new lines May 29 but didn’t plan to release that information until August or September. After repeated requests by The Post and Courier, the board provided on June 28 maps that made it difficult, if not impossible, to see how the changes affected specific homes. The newspaper repeatedly had asked for better quality maps.

The new interactive maps online allow parents to look at an individual school’s zone or enter an address to find out where their child would enroll starting in the fall of 2015. The maps also enable parents to zoom in to see streets and neighborhoods, which wasn’t possible on the previously released maps.

The web-based map viewer may require installation of the Silverlight browser plug-in, and at least one parent reported trouble with opening the software on a Mac computer. The district has provided a seven-page instruction manual to help parents use the maps. The new site doesn’t enable comparisons between previous school zones and the proposed new ones.

Rezoning is necessary in Mount Pleasant because of overcrowded schools, particularly in the north end of town.

“The District 2 board tried to accomplish this while minimizing the number of students impacted,” wrote the constituent board in a statement online. “While the District 2 board reserves the right to make adjustments prior to full implementation of the rezoning in 2015-2016, they are confident these new attendance lines, and other innovative changes, will help the East Cooper area cope with our expanding student population and meet the challenges that lie ahead.”

The proposed new lines likely will be tweaked again this fall. The constituent board plans to meet in August and hold a community gathering at 6 p.m. Sept. 11 in the Wando High auditorium to discuss the proposed lines.

Reach Diette Courrégé Casey at @Diette on Twitter or (843) 937-5546.