The data being displayed are census tract level counts of NSP-funded activities and is derived from an extract of HUD's Community Planning and Development’s (CPD) Disaster Recovery Grants Reporting (DRGR) System. Each observation in the raw DRGR extract is an address at which an NSP activity took place. If multiple activities took place at one address, that address would be in the database multiple times and may over-count NSP activity. This situation is likely if a grantee reports the same property under an “acquisition” activity and a “rehab” activity. The data will also over-count NSP activity if grantees enter an activity at a single address in multiple quarterly performance reports. Conversely, if multiple units were assisted at a single address, that address may under-represent NSP activity. This situation is likely if a grantee reports a single address that actually represents a group of properties or a property with multiple units. The observations were reported by grantees as completed through March 31, 2011. A ”completed” activity has met its national objective; for NSP-funded units this frequently means it has been occupied by a low or moderate income household. Only addresses that were geocoded to a high level of accuracy were included.