Alaska Hydrography Quality
Today, many Alaskans are mapping Alaska’s water and working to bring it in line with modern standards. By the end of 2017 nearly 20% of Alaska’s hydrography will meet national 1:24,000-scale mapping standards. Although a lot of work remains to complete hydrography updates statewide, many partners are making great strides in improving this important dataset for all Alaskans. The map below shows the quality of hydrography data throughout the state. Until recently, much of Alaska’s hydrography remained in it’s original 1:63,360-scale condition.
Hydrography data in much of the state has seen at least some improvement since the original NHD was released in 2008. However, most of the state still needs significant updates to meet national 1:24,000-scale mapping standards. Since 2013 the Alaska Hydrography Database has ensured that hydrography updates that are happening throughout the state make their way into the NHD in a timely and consistent manner. AK Hydro simplifies the hydrography editing process and allows partners throughout the state to include important and necessary attributes with their mapped water data.
Hydrography is a complex dataset, and therefore data may vary greatly from one part of the state, or project, to another. AK Hydro is working with partners to ensure that newly updated data meets national mapping standards.
Alaska’s goal is to have statewide 1:24,000-scale hydrography. Getting to that point takes time and requires numerous updates to various components of hydrography. The figure below shows the many quality levels up hydrography updates within the state.
Please contact the Alaska Hydrography Coordinator for further information about individual projects, updates or the AK Hydro project.