The geodatabase represents the sampling design used to meet the project's purpose. The sampling design relies upon systematic sampling for smaller parks (LEWI and SAJH) and spatially balanced, GRTS sampling for larger parks (MORA, NOCA, OLYM). The objectives of the landbird monitoring program are to 1) detect trends in the density of as many landbird species (including passerines, near-passerines, and galliformes) as possible throughout accessible areas of five NCCN parks during the breeding season and 2) track changes in the breeding season distribution of landbird species throughout accessible areas of the large wilderness parks.

The geodatabase represents the sampling design used to meet the project's objectives. The sampling design relies upon systematic sampling for smaller parks (Lewis and Clark National Historical Park [LEWI] and San Juan Island National Historical park [SAJH]) and spatially balanced, Generalized Random Tesselation Stratified (GRTS) sampling for larger parks (Mount Rainier National Park [MORA], North Cascades National Park [NOCA], Olympic National Park [OLYM]). The GRTS sample design was created using stratified equal probability survey design. Potential transect starting locations were defined based on road and trail networks. The sample design formed the basis for office and field evaluation of selected locations and the subsequent establishment of long-term monitoring transects.