Re: Creating map from OOmapper via o-utils

Posted by MichaelRaz on Jan 17, 2021; 4:26pm
URL: http://maprun.308.s1.nabble.com/Creating-map-from-OOmapper-via-o-utils-tp916p917.html

I'm in the process of documenting a way to go from OpenOrientering Map (the web application) through OOM to Purple Pen, including getting relatively high res results from the original web App.  Process is fairly simple but for one issue - using the O-Util to KMZ files from OOM when any map declination is used.  

Now onto your issue!  The most likely things I can think that are causing problems in your case (without seeing the World File and image) is you are not using the correct coord system (O-Util expects EPSG code 3857).  Check the JGW World file and  make sure that the coord lines (5,6) are the 3857 coord system and check the geo-referencing window in OOM.

Or you have a rotation value in the world file (line 2 and 3).  I think??? that the O-Util app does not handle rotation in the world file, at least from my testing (although I am hoping it is another problem).

Using O-Utils it to produce KMZs from a world file (produced by OOM) with rotation values always causes an offset so far as I have found.  Editing the rotation values to 0 in the JGW and doing this again seems to produce the same offset in the resulting KMZ implying that they are being ignored so messing up the overall location/scaling.

Michael