Seattle public GIS

Seattle ECA layer guide.

What the city's regulatory screening layers show, how the neighborhood aggregates were calculated, and why they are not parcel-level risk scores.

What the aggregates describe

Each neighborhood profile intersects an official Neighborhood Map Atlas polygon with four Seattle environmentally critical area layers: steep slope, potential slide areas, properties associated with known slides, and liquefaction-prone areas. It also counts known-slide initiation points inside the same neighborhood polygon and reports event years when the source carries a usable date.

Percentages are calculated from simplified GeoJSON at refresh time and rounded to two decimal places. Boundaries overlap imperfectly with everyday neighborhood usage and permit labels. Use the values to understand the citywide record, not to rank homes, predict a slide, or decide whether engineering is required.

Neighborhood layer profiles

Each ECA aggregate now lives in the single combined profile for that Seattle neighborhood. These links open the layer section directly; there is no separate set of duplicate slope-detail pages.

01Alki22.11% mapped steep slope→02Fauntleroy21.12% mapped steep slope→03Riverview18.91% mapped steep slope→04Briarcliff18.57% mapped steep slope→05Broadview18.55% mapped steep slope→06North Admiral18.32% mapped steep slope→07Leschi17.27% mapped steep slope→08West Queen Anne17.14% mapped steep slope→09East Queen Anne16.22% mapped steep slope→10Highland Park15.51% mapped steep slope→11Sunset Hill15.04% mapped steep slope→12Cedar Park14.89% mapped steep slope→13Rainier View14.79% mapped steep slope→14South Beacon Hill14.65% mapped steep slope→15Harrison/Denny-Blaine14.38% mapped steep slope→16Seaview13.78% mapped steep slope→17North Delridge13.45% mapped steep slope→18Lawton Park12.48% mapped steep slope→19Madrona12.07% mapped steep slope→20Rainier Beach11.96% mapped steep slope→21Mount Baker10.22% mapped steep slope→22North Beacon Hill10.19% mapped steep slope→23Stevens9.77% mapped steep slope→24North Queen Anne9.37% mapped steep slope→25Arbor Heights8.83% mapped steep slope→26Broadway8.02% mapped steep slope→27Gatewood7.26% mapped steep slope→28Interbay7.12% mapped steep slope→29Columbia City6.64% mapped steep slope→30Windermere6.46% mapped steep slope→31Southeast Magnolia6.32% mapped steep slope→32Fairmount Park5.72% mapped steep slope→33Laurelhurst5.46% mapped steep slope→34Wedgwood5.27% mapped steep slope→35Phinney Ridge4.69% mapped steep slope→36First Hill4.24% mapped steep slope→37Fremont4.24% mapped steep slope→38Ravenna3.61% mapped steep slope→39Pinehurst2.59% mapped steep slope→40University Heights1.95% mapped steep slope→41Greenwood1.88% mapped steep slope→42Green Lake1.65% mapped steep slope→43Wallingford1.55% mapped steep slope→44Bryant1.46% mapped steep slope→45Madison Park0.86% mapped steep slope→46Loyal Heights0.16% mapped steep slope→