WARNING! When using E911 data it is imperative that you
understand the inter-relationships between the various E911
data sets to avoid erroneous interpretations of the data.
The best way to avoid this is to thoroughly read the
metadata for each data set you are working with. Please see
the Use_Constraints section below for more information on
data issues identified by VCGI, Inc. in the quality
control/quality assurance effort conducted for the E911
board.
A GPS mounted vehicle was used to capture the
centerline of "driveways". In cases were the GPS data
capture quality was poor, screen digitizing was used with
digital or scanned ORTHO imagery as the background.