Comments on: Create Garmin-Compatible Raster KMZ Files From Georeferenced Imagery With G-Raster

By: Jan

Jan — Wed, 28 Jul 2010 21:36:58 +0000

Above comment had backslashes remove. KMZ files should be copied to the folder mentioned above, but without the space between Custom and Maps

By: Leszek Pawlowicz

Leszek Pawlowicz — Wed, 28 Jul 2010 21:36:42 +0000

You’re right, of course – thought I had fixed that.

By: Jan

Jan — Wed, 28 Jul 2010 21:35:31 +0000

The kmz files should be copied to GarminCustomMaps (NOT GarminCustom Maps as mentioned above)

By: Leszek Pawlowicz

Leszek Pawlowicz — Fri, 18 Jun 2010 19:21:25 +0000

Check the help file.

By: Don Crawford

Don Crawford — Fri, 18 Jun 2010 19:15:19 +0000

Having a little trouble with this…

I followed the instructions and registered my copy of G-Raster. Using a GeoTiff from the USGS Seamless server, I loaded it into G-Raster and it began to process the tile. I got an error about resizing, saying it failed because the image was too big.

I followed the instructions to the letter. Why does this happen and how can I fix the problem?

By: Leszek Pawlowicz

Leszek Pawlowicz — Thu, 03 Jun 2010 22:57:38 +0000

Can’t be done. You could try to “vectorize” the jpg with a program like MapWel or bmap2mp, but that only works well with an image that has large solid blocks of the same color (like a graphic map).

By: Ron

Ron — Thu, 03 Jun 2010 22:54:15 +0000

I was able to use jpg and google earth to create an overlay on my Macintosh (for Rod Rees above) and created a KMZ/KML file that could be ready by Basemap. My problem is that I have an Edge 705 and I don’t think it likes KMZ files. If anyone knows how to convert the KMZ map to a gmapsupp.img file, I’d really appreciate it.

By: Leszek Pawlowicz

Leszek Pawlowicz — Tue, 16 Mar 2010 07:14:45 +0000

Try my list of georeferencing software and websites:

http://freegeographytools.com/2009/the-big-list-of-image-registration-georeferencing-software

By: Bob Sheahan

Bob Sheahan — Sat, 13 Mar 2010 21:02:59 +0000

I have custom underwater topo maps of reefs that are regular TIFF files (not GeoTiff) that I would like to convert into Garmin Custom maps. My Tiff maps have a Lat/Lon grid on them and I could position a cursor on an Lat/Lon intersection and type in the exact cordinates. Three points on the map should be sufficient to Georeference the map. Please let me know the best way to proceed.

Thanks
Bob

By: Leszek Pawlowicz

Leszek Pawlowicz — Tue, 19 Jan 2010 23:41:49 +0000

The black borders come from re-projecting the maps from UTM to geographic coordinates; in the process, they get rotated and stretched, and the black borders are added to keep the image rectangular. The best you can do is to combine and crop high-res orthos to the maximum size (100 megapixels), which will minimize the number of borders; see my recent blog post on using MicroDEM to do that.