Unknown Projections

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Tampa Bay GIS Users Group

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Feb 2, 2017, 11:57:41 AM2/2/17
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I am posting this on behalf of the poster.  It was posted as a forum topic on the TBGIS website.  http://tampabaygeo.org/forums/topic/unknown-projections/
 
January 26, 2017 at 10:14 am
Does anyone know of a tool that will allow you to QUICKLY identify an unspecified projection – the formats do not require/permit one? I can chase one done but it is time consuming. 

Is there anyone out there that can help him?  Reply back on the forum if you can.
Thanks!

Patrick Wilson

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Feb 2, 2017, 2:03:05 PM2/2/17
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Hi Dan- GDAL's ogrinfo allows for quick identification. More info here: http://www.gdal.org/ogrinfo.html

Chris Smith x251

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Feb 3, 2017, 9:45:14 AM2/3/17
to Patrick Wilson, Tampa Bay GIS User Group

I don’t believe ogrinfo will identify a projection without a .prj, so this wouldn’t work for an unspecified projection. Brute force may be your best option, and to that end, there are a couple of apps that may help:

 

http://jhnklly.github.io/projectionuesser/

https://www.egger-gis.at/automatic-projection-detection/shapefile-projectionfinder/

 

Unfortunately, while the first project looks promising, the app is throwing 405 errors when you try to upload an .shp – maybe you can reach-out to the developer to fix? Here’s the GitHub proj if you want to fork it/report issues - https://github.com/jhnklly/projectionuesser. It doesn’t look like the dev is responding to bug reports, though, so you might need to dive-in yourself.

 

Regards,

 

Chris Smith

Programmer/Analyst
727.786.7955 phone ext. 251 | 727.786.5871 fax | csm...@geosolinc.com

1001 Omaha Circle, Palm Harbor, FL 34683 | geographicsolutions.com

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