I posted several contributions to Northern Virginia Digital History Archive, and some of them are from locations in Northern Virginia and others from Washington, DC. I found it quite easy, and the contribute feature worked quite well and quickly. However, I found one of my images was rejected, and I believe the contribute feature has a maximum size of 2K. A note indicating limitations on file size could be placed somewhere near the Upload File box to indicate to contributors that there is a file size limitation. I was able to rescale my images, so they were under 2K in size. I love taking pictures of the historical sites, monuments, memorials, and etc, especially since I have had a camera in my phone. Some of them turn out great, but others. . .
George Washington's Mount Vernon has a listing of its and other digital databases at Electronic Resources & Research Databases. Some of the databases are open access but others are by subscription. I did a quick search, and I found references to the electric trolley that I will may add to my history of the trolley. I love find snippets of information that lead me to additional information in my searches. Another source of information I enjoy is the Alexandria Archaeology Bibliography. It does not call itself a database but instead a bibliography; nevertheless, it is a database of the archaeological studies done in Alexandria city. Historic Alexandria's web pages are just full of excellent resources for people who are interested in history, especially Alexandria's local history.
