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Gold Prospecting
Gold Maps & Resources
Georeferenced PDF maps (from Geovic or elsewhere)
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<blockquote data-quote="Westaus" data-source="post: 192037" data-attributes="member: 2598"><p>Good topic and work Fever, there are a few ways to do this and I have not tried this way yet. Remember a lot of the old coordinates used on maps use an old datum point and different measures. This can be confusing for sure. However once you have them mapped they work out as a very useful tool. Do you use metadata associated with the file or some other reference? </p><p></p><p>Old PDF/Jpeg maps can also be overlaid on Google Earth which is what I do then stretch and match the old map to the current satellite view. Then save it and you have all the correct data in place and you reference it on Garmin GPS etc now as a kml file. </p><p></p><p>To convert PDF's to TIFF and probably the best free photo editor you can get is the Gimp - <a href="http://www.gimp.org/" target="_blank">http://www.gimp.org/</a> it is an amazing piece of software but has a bit of a learning curve but once you get the basics you can use it pretty easily to cut/crop and re-save an image.</p><p></p><p>Certainly keen to see how you do the uploads and conversions on old maps.</p></blockquote><p></p>
[QUOTE="Westaus, post: 192037, member: 2598"] Good topic and work Fever, there are a few ways to do this and I have not tried this way yet. Remember a lot of the old coordinates used on maps use an old datum point and different measures. This can be confusing for sure. However once you have them mapped they work out as a very useful tool. Do you use metadata associated with the file or some other reference? Old PDF/Jpeg maps can also be overlaid on Google Earth which is what I do then stretch and match the old map to the current satellite view. Then save it and you have all the correct data in place and you reference it on Garmin GPS etc now as a kml file. To convert PDF's to TIFF and probably the best free photo editor you can get is the Gimp - [url]http://www.gimp.org/[/url] it is an amazing piece of software but has a bit of a learning curve but once you get the basics you can use it pretty easily to cut/crop and re-save an image. Certainly keen to see how you do the uploads and conversions on old maps. [/QUOTE]
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Gold Prospecting
Gold Maps & Resources
Georeferenced PDF maps (from Geovic or elsewhere)
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