I am using FWTools 1.0.5 on Windows, specifically the the ogr and osr modules in python.&nbsp; <br><br>In my script, for data that is in lat/lon, I am transforming it to UTM Zone 15.&nbsp; <br><br>When I write the srs to WKT to create a shapefile .prj file, the units come out as 'metre'.&nbsp; I can understand that this unit is equivilent to 100cm, but ArcMap 
9.1 doesn't recognize this as a known unit.&nbsp; If I edit the .prj file and replace 'metre' with 'meter', the units are recognized.&nbsp; <br><br>PROJCS[&quot;NAD83 / UTM zone 15N&quot;,GEOGCS[&quot;NAD83&quot;,DATUM[&quot;North_American_Datum_1983&quot;,SPHEROID[&quot;GRS 1980&quot;,6378137,
298.257222101,AUTHORITY[&quot;EPSG&quot;,&quot;7019&quot;]],AUTHORITY[&quot;EPSG&quot;,&quot;6269&quot;]],PRIMEM[&quot;Greenwich&quot;,0,AUTHORITY[&quot;EPSG&quot;,&quot;8901&quot;]],UNIT[&quot;degree&quot;,0.01745329251994328
,AUTHORITY[&quot;EPSG&quot;,&quot;9122&quot;]],AUTHORITY[&quot;EPSG&quot;,&quot;4269&quot;]],PROJECTION[&quot;Transverse_Mercator&quot;],PARAMETER[&quot;latitude_of_origin&quot;,0],PARAMETER[&quot;central_meridian&quot;,-93],PARAMETER[&quot;scale_factor&quot;,
0.9996],PARAMETER[&quot;false_easting&quot;,500000],PARAMETER[&quot;false_northing&quot;,0],UNIT[&quot;metre&quot;,1,AUTHORITY[&quot;EPSG&quot;,&quot;9001&quot;]],AUTHORITY[&quot;EPSG&quot;,&quot;26915&quot;]]<br><br>I can always do a string replacement in my code before writing the wkt definition to the .prj file, but I am curious if this is intended.&nbsp; 
<br><br>David.<br>