TILT DOWN tower to crew at work drilling ground in wooded area. MLS of barren land in Abitibi region, jeep driving by on rugged road in foreground. DOLLY SHOT along cartographers at work on maps. CS of map on desk, TILT UP to sign "National Air Photographic Library", man coming out door carrying photographs. Sequence on cartographer working on aerial photographs using stereo viewer, drawing lines across photos. Series of AERIAL SHOTs over land in Northern Quebec showing rugged terrain, winding river, land with buildings and roads, power dam on river.