U.S. Protected Areas Resources

• USGS Gap
• NBII
• CBI PAD
• LandScope America
• Private Landowner Network - Online catalog of state by state grant and related funding opportunities for land protection, stewardship and enhancement

Global Resources

• UNEP World Conservation Monitoring Center - World Database of Protected Areas
• IUCN - World Commission on Protected Areas
• IUCN Protected Area Management Categories