Basecamp and 1 meg reolution limit...

I have Basecamp ver. 412 and a Garmin GPSmap 62s. I've made a few custom maps with pdf/jpg images and Google Earth making kmz files. I can import or drag and drop the kmz files into "My Collection" and shows on my Western States Topo map. When I attempt to drag the overlay image from "My Collection" to the GPSmap 62s internal storage I get an error stating I can't place it since over 1 meg resolution.

I have reduced the file sizes even below a meg but same results. If I work outside of basecamp and simply place the kmz into the custom maps folder of the 62s using windows explorer the overlays display without errors in Basecamp. I am in the process of creating a number of custom overlays for my topo maps and curious why the error? Reducing the file size makes no difference. Could the error be based upon the pixel dimensions or the overall area of the google map referenced in the kmz itself and not the overlay?

In any case, I followed the instructions in Garmin's own instructions to place them directly. Maybe would be a good update to Basemap to be able to add to the device in the application as well as manually in win explorer.

John

0 Former Member over 11 years ago

I believe the issue is that the device advertises that limitation (and BaseCamp adheres to it), but actually there is no such limitation.

You can check your device's GarminDevice.xml file. It should have something like <MaxImageResolution>1048576</MaxImageResolution> in there.

In my mind the proper fix is for the device to advertise the correct maximum resolution. We've brought this up with the device guys already, hopefully there will be a fix.

Until then I'd say if manual copying works, that's what I would do. Be advised though that the device *might* reject the file if the resolution is too high. Especially in low memory conditions.

PS: Max Image Resolution is a confusing term (to me, at least). It doesn't have much to do with file size directly. I just checked and what it looks like we do in our code for checking resolution is to compare the total number of pixels in the image (width times height) with that number.

0 Former Member over 11 years ago

IF you want a larger custom map you need to break it into multiple "tiles" that are each no larger than 1024x1024 pixels. Your 62s will support a maximum of 100 such tiles. According to the original specs when Garmin first introduced "custom maps", you can actually use larger images but they will not display at full quality if they are larger than 1024x1024.

There are a variety of tools that you can use to create custom maps with multiple tiles. Have a look at http://moagu.com/?page_id=155 and http://www.the-thorns.org.uk/mapping/

You might also want to visit the custom maps forum here: https://forums.garmin.com/forumdisplay.php?205-Creating-Garmin-Custom-Maps

-Boyd

0 johnrg56 over 11 years ago

Boyd and Falagar... Thanks for the input. I loaded yesterday some higher res files but did note they never stayed high res upon viewing and really slowed down the performance. I'de thought that upon ingesting into Basemap if there was a tile utility alongside the opacity slider, it would be a good addition. In any regard I've removed the larger maps and will size maps as suggessted. Apreciate the links as well.