Technical Details of the Point-In-Polygon Census Intersection Tool

Point-in-Polygon Census Intersection

Overview

Point-in-polygon intersection is the process of assigning an input coordinate the values from an areal unit within which it resides. The USC WebGIS Point-in-Polygon Census Intersection Service will assign Census 2000 geographic variables to input coordinates (latitude and longitude pairs).

Version 1.0 - May 22nd 2009

The USC WebGIS Census Intersection Service stores the Census 2000 tabulation block, block group, and tract information in a SQL Server Spatial database. Census values are returned by performing a spatial intersect using the input coordinates.

Known Bugs

The following list contains the set of known bugs for this release of the Census Intersection Service. We are constantly working to improve the service and will be addressing these bugs in future releases. If you discover or suspect another bug, please report it.

ID Description Fixed