MI VHNTR:
Are you loading the Maptech maps on to your Garmin gps? Or transferring waypoints, and tracks back and forth? I have heard a lot about maptech but my understanding is that Garmin units will only load Garmin MapSource maps or those from a few vendors that Garmin has licensed. A example is the Mexican software package that comes from a licensed vendor.
I can transfer waypoints and tracks back and forth from a number of different vendors but I cannot load their maps.
SURVEYOR: You are correct the maps will not load on to your unit. USGS does have a package that covers Arkansas, Louisana, and Mississippi.
http://www.ngmapstore.com/shopping/product/detailmain.jsp?itemID=458&itemType=PRODUCT&RS=1&keyword=Mississipp GPS Compatibility (Serial and USB) - Terrain Navigator / Terrain Navigator Pro
Created: 04/01/2004
Modified: 12/28/2005
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DISCUSSION
Introduction
Terrain Navigator (and Terrain Navigator Pro) is compatible with a wide variety of GPS units. Transfers of routes, waypoints, and tracks to and from many GPS units is possible - as well as the ability to display a real-time position on the computer screen. The attached .pdf document lists and explains all of the various supported configurations.
USB GPS Units
Many popular GPS units now require use of a USB port for connection to the computer. This includes the Garmin GPS 60c, GPS 60cs, and GPSMap 276c. Because of the shift in protocols from standard serial connection (relied upon in the NMEA GPS specification) and this new USB configuration, version 6.04 (or later) of Terrain Navigator (and Pro) is required in order to communicate with these units. The free 6.04 update is available for customers running previous editions of Terrain Navigator (and Pro.)
Click here for the Terrain Navigator 6.04 update.
Click here for the Terrain Navigator Pro 6.04 update.
Click here for the Terrain Navigator Pro, Network Edition 6.04 update.
Terrain Navigator 7.0 (and Terrain Navigator Pro 7.0) is fully compatible with Garmin USB GPS units; no separate update/download is required.
MapTech does not claim that it's "maps" will load on to Garmin units.