2018 | Richard Carstensen | 2 geoPDFs

High-resolution GeoPDF pair for field navigation on trails in lower Shaanáx Tlein, big valley (lower Lemon Creek watershed). All of these trails are accessible within a short walk from Dzantik’i Héeni Middle School. In apps such as Avenza, on your phone or tablet, you can see your GPS/cell-triangulation position on this image, and lay a track.

First choice below is a LiDAR-derived bare-earth hillshade with modeled streams and 10-foot contours. Other layers, exported from ArcMap, are named roads and hiking trails, and our named wetlands from the CBJ wetland survey project. Thick blue lines are “subsheds,” also mapped during that project. I’ve broken out Switzer and Vanderbilt subsheds from the greater Lemon Creek watershed. So this belt framing the lower, heavily channelized reach of Lemon is rather arbitrary. The bold blue line at Extreme High Water reaches far up under Glacier Highway. Upper limits of the green tint at 32 feet show maximum tidal incursion at peak Little Ice Age.

The second choice is a 2013 orthophoto with overlain streams and trails. More information on geoPDFs and use of Avenza is at Media types>Maps&geoPDFs., and at Tools>Field navigation.

Download hillshade geoPDF here (8MB)

Download aerial geoPDF here (14MB)