Garmin Map Hex Codes

[Hillbilly61]

Is there a definitive reference on which Hex codes defines the symbols (lines, POI, etc) in a Garmin handheld? The reason for asking is that I am finding some differences between GPSMapper and a handheld unit (basic etrex Venture unit) in terms of what either shows, with the Garmin being the reference.

The desire is to keep what is prepared to a lowest common denominator basis so all Garmin handhelds can read the symbology. Customizing .img files with a .typ header will leave many handhelds out in the proverbial cold so to speak, so I want to avoid this unhappy outcome. Any pointers as to where these codes lay would be most greatly appreciated!

About my Knox Co, KY cemetery POI project, things are nearly complete!   The cemetery locations and underlying base map that shows contours, roads, hydrography and the cemetery locations work well within the Garmin handheld.

All that I need to do now is prepare the installer that also registers the map with MapSource. It will be posted on the download part of this webpage. Many genealogists will find resource useful for cemetery hunting in Knox Co, KY!

Thanks again about any pointers as to where the Garmin hex codes can be found. The ones displayed as a graphic in GPSMapper do not always correspond to a 1:1 translation to what the handheld shows.

[Boyd]

What is GPSMapper? 

Do you mean "cgpsmapper"? Or maybe "GPSMapEdit"?

For the definitive list, just read the cgpsmapper manual. It's as definitive as it gets, since it's the program that compiles the map. See http://www.cgpsmapper.com/download/cGPSmapper-UsrMan-v02.5.pdf starting on page 107

You cannot assure that point, line, or area types look the same on different units unless you create your own custom types, as we discussed elsewhere. Even then, you will find differences in rendering style between models.

[Hillbilly61]

What is GPSMapper?  

Do you mean "cgpsmapper"? Or maybe "GPSMapEdit"?

For the definitive list, just read the cgpsmapper manual. It's as definitive as it gets, since it's the program that compiles the map. See http://www.cgpsmapper.com/download/cGPSmapper-UsrMan-v02.5.pdf starting on page 107

You cannot assure that point, line, or area types look the same on different units unless you create your own custom types, as we discussed elsewhere. Even then, you will find differences in rendering style between models.

I had a reference brain fart. GPSMapEdit. Sorry you could not figure this out.

Your advice about building custom types is well taken in the other thread... and YES, the cgpsMapper user manual was thoroughly gone over before posting this query. In fact' another very useful response was previously found re tying typical Garmin handheld images to the codes by thoroughly going though the postings within this board (it's not all that "busy" ... something that can be done in a few hours).

By the way, do you have any custom maps installed on this site's download link? The reason for asking is to obtain something to ask the question in a PM "How did you do that? - Thanks!

[Boyd]

By the way, do you have any custom maps installed on this site's download link?

Sure, see: http://www.gpsfiledepot.com/maps/byuser/282/

While others here have worked to create maps of many different states, my focus has been to create and revise maps that provide an increasing amount of detail in my own state.