Transportation - 5 of 12
Transportation FAQs - 12 Found
The updates are variable. Since the USGS obtains most of this data from external sources, the frequency of updates depends on the release schedule of the source products. Typically these updates range from every few weeks (FAA) to an annual update cycle (Census). Once the updates are made, the web map services are targeted to be updated on a monthly cycle, but updates are immediately available for download.