Frequently Asked Questions

A: Annotations are shown on the clear day reference images to improve situational awareness when making decisions about flight planning. Distance annotations are displayed in 0.5 Statute Mile (SM) increments for annotations over 1.0 SM. Distances are measured conservatively to prevent over-estimation of visibility. Distances under 1.0 SM are displayed as Less than 1.0 SM. Elevation annotations are displayed in 100 foot increments and are shown to the closest 100' mark.
A: The site elevation displayed on the site information tab and clear day image represents the approximate ground elevation at the camera installation location and is shown in feet from MSL (Mean Sea Level). This value is shown to provide a reference point when comparing the annotations displayed on the clear day images. The elevations provided are generated by GPS reading and other resources during the installation and validation process. When comparing a aviation camera site elevation to another resource such as the Alaska Supplement it is important to note that our camera installations are commonly at different elevations than those shown in another location. For example, elevations shown in the Alaska Supplement represent "the highest point of an airport's usable runways measured in feet from mean sea level" (as quoted from the Alaska Supplement Airport/Facility Directory Legend). Our cameras installation elevation may be higher or lower than the highest point on a runway.
A: The timestamps displayed on our camera images are shown in UTC (Coordinated Universal Time) which is not the same as local time. In Alaska, local time is behind UTC by 8 or 9 hours, depending on whether standard time or daylight savings is in effect. UTC is also represented in a 24 hour format.
A: A camera in maintenance status will be shown in the Camera List with a magenta highlight, and will be highlighted in magenta on the site page. A camera that is set to maintenance status is experiencing an issue that affects the accuracy of the information being displayed (badly misaligned camera).
A: The timestamp shown on an individual camera image is the time when that particular image was retrieved. Our system only captures one image per site at a time which can result in several minutes passing between the first camera image saved and the last camera image saved from a site. This is normal operation for our system and does not necessarily indicate a problem or missing images from a site.