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Most Kama'aina go to Vegas, just isn't my thing.  We moved from Seattle, and I still prefer the northern forests to neon lights and loud smokey casinos.

The OMS map looks to also be in NAD 27.  It shows the intersection coordinates as N21 55.766 W159 30.664.  The state of Hawaii GIS department has shape files for the TIGER data.  Links to the data are available at this site http://hawaii.gov/dbedt/gis/download.htm.  The site has TIGER and USGS road data for the entire state along with County sponsored data for Hawaii County, Kauai County, Maui County and The City and County of Honolulu (Oahu and Lanai). 

I have worked with the TIGER data for Kauai in the past and the TIGER data did not distinguish between paved and dirt roads.  The Kauai County provided data is GPS derived but the metadata file for Hawaii County says it is rectified to parcel data and is not positionally accurate.  the best approach is probalby to use the NAD 83 TIGER data from the site and augment it with County data if it is better.  I suppose I should volunteer to convert the data and make it available for an update to ibycus and OMS.  I see that there is a SHP to IMG converter.  I will need to learn a bit about the process and what extra work is required for routeable maps.  I am heading to Seattle on vacation in a few days so I won't be able to get to this for a while.

I loaded the Hawaii Topo and the and Ibycus USA 2.0 onto my Colorado and then compared the maps.  My location relative to the roads on the maps was different and the shift looked to be about the same as the shift between NAD 27 and NAD 83 datums.  My position on the ground matches the Hawaii Topo map but not the Ibycus map.

As a check, I looked at the coordinates for the intersection of Koloa Rd and Kaumualii Highway in Kauai in MapSource.  Ibycus shows the coordinates as N 21 55.764 W159 30.661 and the Hawaii Topo shows N21 55.578 W159 30.496.  I shifted the Ibycus coordinates from NAD 27 to NAD 83 using the National Geodetic Survey program NADCON http://www.ngs.noaa.gov/TOOLS/Nadcon/Nadcon.html.  The shifted coordinates are N21 55.575 W159 30.493.  It looks like the Ibycus data for Hawaii is in the NAD 27 datum.

Bigbob,

I always find the hardest part about getting started is getting the big picture.  I installed the demo version of Moagu and am going thru the help files.  This is a big help in understanding the overall process. 

Moagu does not list the Colorado as a supported unit.  However, I believe you can create maps in Moagu that can be fed into the Colorado using the MapSouce program from Garmin. 

DaKine

Thanks for the detailed instructions.  I installed the Hawaii topo off this site yesterday, and it was extremely simple.  I am not afraid of jumping into the deep end, because the tutorial and forums on this site are well written.  "Ainofea"

I downloaded a half dozen raster charts and converted them to TIFF format.  I'll let you know how the rest of the conversion goes and how quickly they update when navigating with the Colorado.

I am looking to create electronic navigation charts for my Garmin Colorado.  NOAA has freely available raster charts in BSB format and vector electronic navigation charts in the International Hydrography Organization S-57 Standard format.  I am new to creating Garmin GPs files and would like advice on how to convert these files. 

Reading thru the posts, it looks like MOAGU could convert the raster charts.  Is that true?  Are there any programs that will convert the IHO S-57 Standard format?