1 INTRODUCTION
2 SPIN FORMALISM FOR INTENSITY MAPPING
2.1 Map-making
2.2 Scan strategy
3 CASE STUDIES
3.1 Polarization leakage from effective gain mismatch
3.2 Beam squint
4 DEMONSTRATION OF EXTENDED MAP-MAKING
4.1 Simulations
4.2 Removing polarization leakage
4.3 Removing leakage from beam squint
4.4 General application and limitations
5 CONCLUSIONS