How long does a data extract take on NHGIS?
The time needed to make an extract differs depending on the size of the data extract requested and the load on our server. Extracts can take from a few seconds to an hour or more. The system sends an email when the extract is completed, so there is no need to stay active on the NHGIS site while the extract is being made. If users wish, however, they can stay on the Extracts History page following an extract request. Refreshing the web browser will allow the user to see progress being made on the extract request.