We had this for some CA cover type grid files used many moons ago - same idea, slightly different parameters. Can't recall the file/data set or source, maybe Teale...
For California cover type grids; "Albers NAD 27 Meters", 9, 62, 7, -120, 0, 34, 40.5, 0, -4000000 Will Mitchell Mitchell Geographics, Inc. 496 Congress St Portland, ME 04101 ph 207.879.7769 fx 207.253.5756 www.mitchellgeo.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, March 23, 2005 2:23 PM To: [email protected] Subject: Re: MI-L Universal Translator and Albers NAD97 projection Bill, Thanks for the introduction to writing a custom projection. No longer as daunting as it seemed. I tried your line as written, and California was shifted about 2,900 miles northward. I played with the False Northing until this worked: "Albers California Custom (CASIL)", 9, 62, 7, -120, 40.5, 34, 40.5, 0, 275800 Looks like the metadata's False Northing was untrue. Truly grateful, Mike In a message dated 3/23/05 8:24:09 AM Pacific Standard Time, [EMAIL PROTECTED] writes: Mike: Under the supplemental info at the website you referenced, these are supposedly the projection parameters used for this data. I constructed a mapinfow.prj file entry you can use below when translating via the UT. Copy it into the Regional Conformal Projection section in your mapinfow.prj file using Notepad. It should work with these parameters if they are correct in the metadata referenced below. Give it a whirl -Bill Datum: NAD 27 Projection: Albers Units: Meters 1st Std. Parallel: 34 00 00 (34.0 degrees N) 2nd Std. Parallel: 40 30 00 (40.5 degrees N) Longitude of Origin: -120 00 00 (120.0 degrees W) Latitude of Origin: 00 00 00 (0.0 degrees) False Easting (X shift): 0 False Northing (Y shift): -4,000,000 PRJ file entry: "Custom Albers System", 9, 62, 7, -120, 40.5, 34, 40.5, 0, -4000000 Mail List: [EMAIL PROTECTED] From: on 03/23/2005 12:35 AM To: [email protected] cc: Subject: MI-L Universal Translator and Albers NAD97 projection Need help projecting a map table. I downloaded a shapefile for California PLSS townships and sections from _http://gis.ca.gov/meta.epl?oid=298_ (http://gis.ca.gov/meta.epl?oid=298) which says the projection is Albers NAD97. I have tried running it through Universal Translator with variations on North American Coordinate Systems: Albers Equal-Area Conic(North America) and Albers Equal-Area Conic(Continental U.S.), with no luck. Can someone point me in the right direction? Thanks, Mike --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 15787
