Tom Kralidis 2000-09-01 GCDB One Ottawa, Ontario, Canada Tom Kralidis The Ground Control Database (GCDB) is a collection of geo-corrected aerial photo imagettes (or chips) developed for the GIS and remote sensing community. The database provides accurate and useful information obtained from corrected aerial photos. This database can be used by the end-user as a fundamental data source for correction and validation of satellite, vector and raster data, as well as for map correcting and updating, analysis, modelling, and image processing. The GCDB was initially developed to supplement processing and/or correction of LANDSAT and SPOT data for value added satellite imagery products. Now, through GeoGratis, online access to the GCDB is offered as an efficient and cost effective method of delivery to the end-user. Range:1950-07-31 - 1995-10-19 Based on the acquisition flight date. Complete As needed -141 -52 84 42 Thesaurus: GCMD EARTH SCIENCE > LAND SURFACE > Topography > Terrain Elevation EARTH SCIENCE > RADIANCE OR IMAGERY > Visible Wavelengths > Visible Imagery > Photography EARTH SCIENCE > HUMAN DIMENSIONS > Boundaries > Surveys Ground Control Points GCP Aerial Photography Air Photo Canada Canada > Alberta Canada > British Columbia Canada > Manitoba Canada > New Brunswick Canada > Newfoundland Canada > Northwest Territories Canada > Nova Scotia Canada > Nunavut Canada > Ontario Canada > Prince Edward Island Canada > Quebec Canada > Saskatchewan Canada > Yukon Arctic Mid-Latitude Western Hemisphere Northern Hemisphere North America None None