California Spatial Reference Center
Establishing and maintaining an accurate state-of-the-art
network of GPS control stations
for a reliable spatial reference system in California
network of GPS control stations
for a reliable spatial reference system in California
Overview
- The CSRC, in coordination with NGS, is currently developing a set of software named the "Pocket GPS Manager" (PGM) to support GPS campaign information exchange. PGM is designed to provide a well-defined, flexible, and platform-independent system to improve information exchange in GPS-related fields. Early development platforms include handheld PDAs and Windows XP operating systems. With height modernization and geodetic densification projects underway in California, a primary goal for PGM is the replacement of hand-written field logs used in GPS campaign surveys with modern information technologies. Specifically, information will be transferred from users in the field or office to central repositories using web services, xml, and network transport mechanisms (e.g., http, smtp, ftp).
Technical Information
- PGM is a client-server architecture where such communication uses xml-based
message exchange: xml-encoded information conforming to a set of published
XML schemas. Currently, clients are Java-based applications for both
desktop (J2SE) and PDAs (J2ME). The server architecture will be designed in
a way that supports a many-to-many relationship, where a PGM client
application can access multiple sources or repositories (e.g., CSRC, NGS,
etc
PGM is currently supported on two PDA platforms:
- HP iPAQ hx2750 series
- HP iPAQ hx4700 series