GPS Custom Layer FAQ
Note: GPSLayer is currently built at 9.3.1 SP2 and is not compatible
with 10.0 - click HERE for a
version compatible with 10.0
- Why I can't see my GPS collector?
GPSLayer uses standard ArcObjects to manage the GPS feed. If you cannot
see the GPS collector in ArcMap using the out-of-the-box GPS toolbar,
then you are most likely missing a piece of middleware that should be
provided by your unit's manufacturer.
- First of all, make sure the GPS unit will work with ArcMap's GPS
- Make sure the GPS unit has been configured to operate in compliance
with NMEA-0183: 4800 Baud, 8 data bits, no parity, 1 stop bit.
- If the Detect button still doesn't work, make sure the correct COM
port appears in the dropdown list. Some drivers may assign a
nonstandard COM port ID which could create problems.
- Make sure no other application is reading the GPS. That can cause
a port conflict.
- Why am I not seeing the GPS point if the dialog is displaying
- In ArcReader, be sure to refresh the display after activating the
layer. This is a bug in 9.2 that is not fixed in 9.3.
- Make sure the data frame coordinate system and units are set when
the PMF is published.
- Check if the map has a reference scale set that would shrink the
symbol to invisibility (see below).
- Why does the GPS point get larger or smaller as I zoom in or
If the map has a reference scale set, that will affect the sizing of the
GPS point. To disable this, in ArcMap set the reference scale to "None"
before publishing to PMF.
- Can I change the GPS point symbol?
Yes! As of version 3, you can set the symbol from an ESRI ServerStyle
file and save it in user settings or in the PMF when published. See
GPSLayer.pdf in the download for details.
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