My original question was: I have some scanned map sheets of parts of italy. They only have the sheet numbers (ie F143 ii NE) and not xy coordinates. I can find out the coordinates by refering to the italian national grid and finding the corresponding sheet number. However, I don't know where to obtain a copy of the italian national grid with this information on. Does anybody have this information or know where I can get it (we've looked on the italian OS website with no luck). John -------------------------- Here are some useful replies: The reply from Gianmario Nava was the most useful and allowed me to reference the maps to UTM zone 33. He also sent me an excel file of long/lat coordinates for the upper left corner of each sheet in the Rome region. If you'd like a copy please email me and I will forward it: Do you have images of 1:25.000 topo maps? I think so, in this case F143 II NE sheet is named ACILIA. You can build italian grid in this way: The central meridian is placed in on Monte Mario, near Rome, which longitude is 12° 27' 10,93" east Greenwich reffered to ED50 spheroid. Every 1:20.000 sheet is 0° 7' 30" longitude wide and 0° 5' 0" latitude wide The sheet named Monte Mario is 149 I NE and his upper right corner has coordinates E 0° N 42° The oder of sheets is IV I III II Acilia is the second sheet above Monte Mario, or the third if you count Monte Mario, at the same longitude. So its upper right corner has coordinates: N 42° - 3*0° 5' 0" and E 0° F means foglio ad in effect is reffered to 1:100.000 topo maps on which are based geo maps 139 is the number of the 1:100.000 sheet III (roman number) indicate the "quadrante" I don't know how to translate may be quads or similar they have the order I told you, but I give you an scheme in attachment SO means Sout West SE South East NO North West NE North East Theese are "tavolette" or tablets at 1:25.000 scale Please find in attachment the chart of your maps Once defined the italian grid in geographic coordinates you can easily project it in UTM zone 32 (better for fuse 1 at the west from M. Mario) or zone 33 (better for fuse 2 at east from M. Mario) Alberto Antinori suggested purchasing the vertex coordinates from IGMI - who make the maps: The maps you cope with are "Tavolette", the old 1:25.000 topographic maps produced by the IGMI (Istituto Geografico Militare Italiano) up to '60s. I could send from home an image showing geographically the meaning of their name (ie F143 ii NE is for Foglio (1:100.000) N0143, Quadrante 1:50.000 N0 II (2), Tavoletta Nord Est. Each Foglio is made of 4 Quadranti and 16 Tavolette. Their geographic cut frame is made by pars and meridians of the Italian Coordinate System known as Gauss-Boaga (a Transverse Mercator with particular parameters) and the vertex coordinates were once for all determined by the IGMI who detects this data. You could try to apply to their site http://www.nettuno.it/fiera/igmi/igmit.htm as I did just now and I found that they sell UTM and GB (Gauss-Boaga) vertexes coordinates for each Foglio (see the F143) comprising 16 Tavolettes ON PAPER (forgive them please...) for 10 KLit. (about 5 $ nowaday). I had to talk them by phone couse the list-price on line was not so complete about. They also do not accept payment by credit cards. Cliff Mugnier suggested another source of an index: Your index map for sheet numbering is in: "World Mapping Today " by Parry & Perkins, Second Edition, ISBN:1857390350 Page 796. (It's printed in the UK, but is a bit pricey). Sheet lines are on the graticule and not the Grid. ---------------------------------------------- John Fannon GIS Specialist WRc Plc Frankland Rd Blagrove Swindon SN5 8YF email: [EMAIL PROTECTED] Tel: 01793 865096 Fax: 01793 865001 Solutions for water, waste and the environment ---------------------------------------------- The information in this e-mail is confidential and is intended solely for the addressee. Access to this e-mail by any other party is unauthorised. If you are not the intended recipient, any disclosure, copying, distribution or any action taken in reliance on information contained in this e-mail is prohibited and maybe unlawful. When addressed to WRc clients, any opinions or advice contained in this e-mail are subject to the terms and conditions expressed in the governing WRc client Agreement. _______________________________________________________________________ List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MapInfo-L" in the message body.