Aerial Photo Mosaics = Photo Indexes and Map-Line Plots: Pre 1990

USGS and Non USGS Agencies Aerial Photo Reference Mosaics inventory contains indexes to aerial photographs. The inventory contains imagery from various government agencies that are now archived at the USGS Earth Resources Observation and Science (EROS) Center. The film types, scales, and acquisition schedules differed according to project requirements. Low-, middle-, and high-altitude photographs were collected.

美国地质调查局（USGS）及非美国地质调查局机构航空参考镶嵌图索引库收录了航空影像的索引信息。该索引库所收录的影像来源于多个政府机构，目前均归档于美国地质调查局地球资源观测与科学（EROS）中心。影像的胶片类型、比例尺及采集计划均根据项目具体需求有所区分，采集覆盖了低空、中空及高空拍摄的航空影像。