Creating georeferenced image overlays from .gpx or .kmz files to be used as maps in Garmin Montana

Discussion in 'Mapping & Navigation' started by Lord Dogmeat, Jun 28, 2018.

  1. Lord Dogmeat

    Lord Dogmeat Been here awhile

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    Ok, I could be asking a question thats been asked a bazillion times here, but here goes -

    What I am trying to do is ultimately find a way to put published trail maps on my Montana 600 for both Wyoming and Idaho single track dirt bike trails, not so much adventure riding ... The ADV-style riding will come later :)

    Wyoming does not publish the .lyr, .gpx, or .kmz files so there is no raw data to work with here. What I'm waiting to do is try to find a way to get the GeoPDF onto my Montana 600 as an image overlay that I can essentially use for a trail map.

    Wyoming maps available here -

    http://wyoparks.state.wy.us/index.php/orv-trails/orv-maps

    With the Idaho stuff, thankfully the state publishes the .Kmz files for the trail maps so you have the raw data to work with, available here -

    https://trails.idaho.gov/pages/kmzdownload.html

    The cool part with the Idaho stuff is you can save a .kmz file for each type of trail designation and theoretically make a color-coded map with it.

    The problem I'm having with the Wyoming stuff - How do I go from a GeoPDF to a GeoJPEG or GeoTIFF I can import into my Montana 600? I can't seem to get the combination of Google Earth Pro, Garmin Basecamp and EasyGPS to accomplish this ...

    The problem I'm having with the Idaho stuff - How do I take a selection of tracks, which are in essence the trail maps, and create a GeoTIFF or GeoJPEG out of that selection? If I try to "Join" the tracks, it comes back a jumbled mess .... The one workaround I've found for the Idaho stuff is I can manually select a track segment and create routes based on those tracks, so I think in the meantime I can do what I need to do navigation-wise that way .... but it would just be easier to have the actual map overlay right on the screen of my GPS mounted to my handlebars.

    ANyways I thought I'd post up and see if any advice had already been given. Something tells me I'm just not quite looking int he right spot, so go easy on me if I'm not.

    Thanks in advance!
    #1
  2. ohgood

    ohgood Just givver tha berries !!!

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    I don't know what the file size limitations are for the Montana, but I normally:

    download PDF
    convert to jpeg
    then georeference the jpeg in a phone app, and upload it to Google drive

    then I can download it to all my tablets/phones whenever.i never figured out how to make the files small enough to fit in my Oregon 450, so I sold it.

    here's an example of what it looks like when I'm done.
    Screenshot_2018-06-28-16-20-44.png Screenshot_2018-06-28-16-20-51.png

    if you can find ito the file size limitations for your Montana, it's really not that much harder to convert and georeference in Google Earth than it is on a phone.
    #2
  3. Lord Dogmeat

    Lord Dogmeat Been here awhile

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    Which software are you using to convert to .JPEG? I can't seem to get Google Earth Pro to do ti ..... I tried using an online converter but it didn't get the georeferencing correct.

    I guess perhaps I'm making the georeferencing bit more difficult than it needs to be, are you just eyeballing it for the most part?
    #3
  4. wbbnm

    wbbnm Long timer

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    I discovered the program MAPC2MAPC about a year ago after a few years of fruitless searching.

    It will convert geospatial pdf files to kmz files that you can load into a Montana.

    I used to do this by hand in GE. It was tedious and my results were never that great.
    #4
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  5. ohgood

    ohgood Just givver tha berries !!!

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    there's an app for that... called pdf2img ... I don't know if they make an iOS , windows or man version of something similar, I use Android.

    no eyeballing at all, you pick a point in your PDF (I'm going to call it pdf to prevent confusion), then pick a point on your regular map that correlates to that point.... after 4 points (father apart are better) are related, it stretches and skews the PDF to fit your waypoints, then experts it to a kmz.

    wbmns' app is probably easier, especially if you're doing a bunch of them. I just do each park/event PDF at a time as needed for my phones
    #5