Gis data source
<p>can anyone suggest if there's any information source from where I can know about the infrastructure, buildings, roads, pipelines, parks etc existing at some point back in time. Like what things existed in the 1970s , 1950s etc. Are there such data repositories existing for anywhere(city or a county etc) . Or any organisation recording information about the time the buildings, homes etc were built so I can extract the info from there. Thanks</p>