Hi David, It seems that the map in question are part of some annual series, which suggests that the projection is known and well defined. You might want to query the library along this path.
If this approach fails, you may also digitize elements from the map as if it was a "flat" map. If you also digitize at least four control points around the state with known locations, preferably using the graticule, and afterwards perform some sort of "rubber-sheeting" on the entire dataset, you might be able to get the data into your preferred projection. I believe there are a number of available tools for this. HTH Lars V. Nielsen GisPro, Denmark http://www.gispro.dk/ ----- Original Message ----- From: "David T. Hughes" <[EMAIL PROTECTED]> To: "'MapInfo List'" <[email protected]> Sent: Saturday, February 26, 2005 4:16 AM Subject: MI-L Help with projections, please Okay. I know that there ARE different projections, and that they are different mathematical models of the world (spheroids, mercator, etc. etc.). Here's the deal that has me beat: I'm working with some antique maps of Native American treaty boundaries (you can see them at http://memory.loc.gov/cgi-bin/query/r?ammem/gmd:@field([EMAIL PROTECTED](g3701em+ gct00002 -- then click on the map of Alabama in the top left). Drafted in 1897 or 1898. They are in the public domain here but are still a very important resource for people working on Enclosed Nations issues. Anyhow, I want to use those as part of a MI series of searchable material linking treaties, people, and times. BUT, before I can do that I need to reproject them to something (ANYTHING!) MI will understand. Since I don't know the original projection (I own the original volume these came from) and cannot find any reference to it at all, I'm stumped. Not knowing the original projection makes it very tortuous to bring them as anything at all that links to the other maps (all are in UTM NAD1927, Zone 14/15, North America). Is there a simple way in MI 7.5 (or any external utility freely available) to load the SID or TIF or BMP to a program, click on 4 or more lat/lon interesections, enter the coordinates of the intersections, and then tell the program "Okay, now warp it into a projection my software knows about"? I'm out of options on this, and really need to find a patch by the end of this semester. Thanks in advance to anyone who has any ideas at all -- I'll even store the results and put together a SUM at the end of the mail if there is interst from others in the same esoteric use. Dave Hughes Newton, Kansas USA --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 15444
