Just two companies dominate geospatial imagery, or the satellite business, Cramer said Wednesday, but only one right now is worth buying.

Those companies are GeoEye and DigitalGlobe , which share billions and billions of dollars worth of business from both public and private clients. The US National Geospatial Intelligence Agency (NGIA) just this month announced the two firms would split a $7.3 billion contract, and Google , Microsoft and Yahoo! employ their satellite imagery as well. In fact, DigitalGlobe is behind Google’s popular Maps and Earth programs.