[GIS-Cafe] Egyptian Hayford transformation to WGS84 Geographic

Dear GISers,

I'm trying to convert Cairo digital maps (produced by CAPMAS) into Google Earth (the method is explained on my blog) but the problem is that when converting my digital map into Geographic Coordinate System, (from the assigned European Datum UTM Zone 36N with modified Hayford 1909 parameters ), I end up having a 65meters shift!! !

Was anyone able to achieve better match?

I'm attaching the PRJ file from my custom definition.

Regards,
Ahmed

http://ahmedwagih.wordpress.com

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