How do I project jpg mosaic?

jamieburgess

I have a folder from a colleague of jpg, prj and jgw files expported from global mapper. I do not see anything but the jpg files in arcview arcgis version 10.0.

Add data loads the jpgs, I get the message "the following sources you added are missing spatial reference information. This data can be drawn in Arcmap. But cannot be profected."  And that is what it does.

 

How do I get arcmap to ustilize the projection data in the lprj and jgw files?

 

Thanks

Jamie

DarrenWiens2

To be honest, I'm not the best person to answer this question because I don't know the default behaviour (which I assume would be to use the .jgw file if the projection info is not found in the image header), but this link shows you how to force ArcMap to use the world file, under ArcMap Options (see the bottom of the page). If that still fails, open the .prj or .jgw in a text editor to determine the desired projection, then define the coordinate system yourself.