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The data is intended to help assess patterns of land cover at a variety of scales. The polygons represent areas which have similar land cover type. Landcover information was derived from 3ft NAIP imagery flown during leaf-on seasons. This dataset is still in Beta. What that means is that the tree, water, and gravel (streambed) classes are quite reliable; the built (impervious), ground, and low vegetation (grasses and shrubs) land cover classes tend to get mixed in with each other. Each WRIA/county varies in accuracy - the user needs to visually inspect a few areas to confirm the needed classes are still of use with the current accuracy. <\/SPAN><\/P>

We are constantly improving the landcover accuracy with new versions. If you would like to be informed when new data is available for your area, email HRCD@dfw.wa.gov<\/SPAN><\/P>

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