The satellite tested the feasibility of a Seasat network to monitor the world's oceans and to provide ships at sea with detailed, updated charts showing the latest weather conditions. The more wavelengths or spectral bands used, the easier it is to identify the object. The first data received from this system were used to identify known objects which then were used as models for a computer system. Once objects could be identified reliably, Landsat images were made available to scientists working to improve life on Earth. The Landsat images are used to locate sources of sea life, minerals and even fresh water.
Images provide accurate maps and charts of areas previously too remote for conventional map makers.
These maps provide data to aid in urban planning and rural land use so that the most effective use can be made of the Earth's resources. The satellite's primary objective was to test the feasibility of measuring the Earth's temperature from space. The spacecraft was to measure the same areas of the Earth's surface, both for maximum and minimum temperatures on a given day. This information then was used to identify different rock types which could be used to locate mineral resources. HCMM also monitored moisture levels in soil and gave indications of the amount of water being given off by plants.