Houston

Five regions on county lines: Harris County, North suburbs, West suburbs, Galveston Bay and Brazoria/Matagorda.

In the editor each region takes a level with one click. When one region needs more detail, split it into its counties and set them one by one; merge it back when they agree.

Regions in this starter map

• Harris County1 countyHarris County
• North suburbs3 countiesMontgomery County · Walker County · San Jacinto County
• West suburbs5 countiesFort Bend County · Waller County · Austin County · Washington County · Wharton County
• Galveston Bay3 countiesGalveston County · Chambers County · Liberty County
• Brazoria/Matagorda2 countiesBrazoria County · Matagorda County

County lines from the Census Bureau, coastline from Natural Earth.