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1.What is Personal Location & Tracking (PLT)?
2. How accurate is GPS?
3. Can I Track Devices
anywhere?
4. How do I establish a
Group Web connection?
5. Why do I get a map
of Madison, AL when I tap the MAP button?
6. How do I get a Map
when I have no GPS data for that area?
7. What is the
difference between Location and Tracking?
8. What is the Maximum
number of Tracking records allowed in the database?
9. What data is sent
out? How big is it?
10. Can I adjust the
data sending intervals?
11. How do I force
sending data manually?
12. What is a ZONE?
13. What are the
capabilities of a Zone?
14. Who can create or
delete Zones?
15. What is a CODE?
16. What is a KEY?
17. How do I use
POLLING, MARKERS, and TRIP on the SETUP screen?
1. What is Personal Location & Tracking (PLT)?
PerDiemGPS is a PDA/Phone application for providing Personel Tracking
using your GPS receiver data. With the PerDiemCo software on your PDA or
Phone you can do the following: · Show your PDA or Phone's current
location on a Map. · Establish geographic Zones with entry & exit
notification. · Selectively send your current location as a Map to
others. · Provide 'coded' web access to your Maps. · View location and
tracking on the PDA or on a PC Map. · Create Shared Zone and location
maps on the PDA and on the map Server.
2. How accurate is GPS?
Today's GPS receivers are extremely accurate, thanks to their
parallel multi-channel design. Certain atmospheric factors and other
sources of error can affect the accuracy of GPS receivers. Most GPS
receivers are accurate to within 15 meters (49 feet) 95% of the time.
Generally, users will see accuracy within 5 to 10 meters (16 to 33 feet)
under normal conditions. However, it won't be able to get positions
while indoors, underground or in tunnels.
3. Can I Track Devices anywhere?
Factors that can degrade the GPS signal, and thus affect
accuracy, include the following: Ionosphere and troposphere delays — The
GPS signal slows as it passes through the atmosphere. Signal multipath —
The GPS signal is reflected off objects such as tall buildings or large
rock surfaces before it reaches the receiver. Orbital errors — Also
known as ephemeris errors, these are inaccuracies of the satellite's
reported location. Poor satellite visibility — The more satellites a GPS
receiver can "see", the better the accuracy. GPS units typically will
not work indoors, underwater, or underground. At the same time, PLT's
effective area is limited to cell phone data service coverage
since it uses your data network to connect to our server.
4. How do I establish a Group connection?
Ensure that the two (or more) devices are turned on, and
have the web browser pointed to http://www.ddiem.com/gps/.
Enter your DeviceID and
your shaed trip Code. See the on-line manual on how to create a DeviceID
and Trip Code. Devices with the same Trip Code are 'grouped' together
for tracking.
5. Why do I get a map of Madison, AL when I tap the MAP
button?
The PDA/Phone needs GPS data (Lat/Lon) to retrieve a map.
Sacramento is the default Latitude & Longitude. To get a map switch the
GPS connection and 'capture' current Lat/Lon data and then request a
map. Running a Log file will also capture Lat/Lon from the file and a
map of the associated location can be requested.
6. How do I get a Map when I have no GPS data for that area?
The GPS data stream must be 'ON' to retrieve a map.
7. What is the difference between Location and Tracking?
Location is the current position of the device as recorded in
the database. When Polling is activated Location Packets are sent to the
Map Server at regular intervals (user selectable times). The Current
Location record is updated with this information. If Tracking (Trip On)
is activated, each Location Packet is stored in seperate data records,
the Current Location Record is also updated. The Tracking (Trip) data is
used to display the 'Tracks' using the Tracking Map on www.perdiemco.com/PDC.htm
web page.
8. What is the Maximum number of Tracking records allowed in
the database?
The current limit is 25 records per trip Code. At 60 seconds per packet that
is about 25 minutes. When the Polling rate accumulates 25 records then when the limit
is reached older records will be overwritten to
keep the total at 25 records. Choose the Polling rate with these limits
in mind. The Configuration screen has a utility to GET CODES that shows
codes used and also the number of records in the database. Records can
be deleted by code ID from this page.
9. What data is sent out? How big is it?
The Location data packet includes coordinates
(latitude/longitude), speed,max speed, heading, altitude and GMT time.
Each sending is about 100 bytes.
10. Can I adjust the data sending intervals?
Yes. You can choose to send data every 15 seconds minimun up to
every 5 minutes, or you can manually send. To change the sending
interval, on GPS screen, tap the Timer button on the GPS Screen, select
"Poll interval...".
11. How do I force sending data manually?
From the GPS Screen, select 'SendLocation', the program will acquire
the current position and send to server, despite of the sending interval
value set in 'Setup'.
12. What is a ZONE?
(A Zone is a bounded geographic space. There are currently two
Zones defined in PLT. Zone1 is drawn in Red and Zone2 is drawn in Blue.
Both Zones can be created on the Web Page (members only, KEY required) and Zone1 can
be created on the PDA. No Zones can be created on a SmartPhone at this
time. Zones created on the PC or the PDA are updated in the database
when saved and are immediately(sp) operational.
13. What are the capabilities of a Zone?
Zones respond to the entry and exit of the defined space. If
notification is enabled with an e-mail, SMS, or phone response, then the
entry and exit of the space is reported to these addresses with time and
movement information.
14. Who can create or delete Zones?
Zone creation is available on the web site www.diem.com/ and
from PDA devices (Zone1 only). You must 'Login' on this site to be able
to access the Zone creation page. Zone information is viewable on all
devices using the MAP/DATA screen. Each device can 'see' their own
Zones. Zones can be created and shared using your deviceID and your
current 'Code' setting (see your config screen). Using the deviceID and
the code information other devices can load this Zone and 'Track'
entry/exit of the area. This is useful for group activities.
15. What is a TRIPCODE?
A 'TRIPCODE' is a self assigned ID used to identify your data. You
provide this TRIPCODE and your ID (usually your phone number) to allow
them to 'see' yor location on our web site or on their device. This code
can be changed to provide your data or trips with seperate identies.
This is useful to filter others access to your location. The CODE is
managed on the CONFIG screen.
16. What is a KEY?
Your KEY is provided to you when you become a registered MEMBER. This
identifies you as having setup and editing rights to your data, such as
Zone management, Group membership, data management, etc. DO NOT SHARE
THIS KEY, it is your secure way to manage your data!
17. How do I use POLLING, MARKERS, and TRIP on the SETUP screen?
These features provide control on the amout of data (location packets)
sent to the server. POLLING sets how often data is sent, MARKERS sets a
limit on how much is stored on the server, and TRIP toggles between
multiple records saved or a single location record being updated at the
POLLING rate. These choices will change the PC tracking display. POLLING
will change the spread between data points, depending on rate of travel.
MARKERS will display only ten (moving) Icons and ALL will display a long
trail of all location packets. TRIP OFF will display only one Icon
showing the current location, it will change at the Polling rate. TRIP
ON will display all data Icons.
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