Aerial Photography, Remote Sensing, Lidar
Lidar (light detection and ranging) is the latest technology for viewing land from above. It has many uses, but one of the most interesting for tree farmers is its ability to see the landform beneath a stand of trees. The Washington DNR, Division of Geology and Earth Resources, is planning to increase the coverage in the state in the next few years.
An article in the Washington State Geology News, April 2016, identifies the specific areas that are scheduled to be flown next.
Another source of information on public domain high resolution Lidar is the Puget Sound Consortium.
Google Earth Pro is now available free. It allows for zooming by parcel number, measuring acres, and saving high resolution files. The license key for Google Earth Pro free is GEPFREE.
Google Maps provides satellite photos online, and if you install GoogleEarth on your computer, you can see them in 3D. However, the maps are not dated and often are several years old.
Bing Maps also provides photos and bird's eye views online. Like Google maps, they can be several years old and are not dated.
The American Tree Farm System hosts online webinars that are available free, at any time, for your use. The webinar titled Leveraging the power of Google Earth is 1-1/2 hours long and may provide some useful information on this valuable mapping tool.