Update sites_metadata.csv

#229

updated metadata description according to procedure of @Troger4

metadata/sites_metadata.csv

@@ -9,7 +9,7 @@ Column,Field,Description,Storage.Type,Variable.Codes,Units,Populated.by,n,Min,Ma
 8 / H,country,Country,character (string),-,-,manual entry,2070,-,-
 9 / I,lat,"Latitude, where negative values indicate S hemisphere",numeric (double),-,decimal degrees,manual entry,2070,-43,73
 10 / J,lon,"Longitude, where negative values indicate W hemisphere",numeric (double),-,decimal degrees,manual entry,2070,-171,175
-11 / K,coordinates.precision,"Precision of coordinates, as reported by source or estimated from maps. Parentheses indicate precision levels that were inferred from the values in ForC and require validation against original source.",character (string),"degree- rounded to nearest degree or rough fraction of a degree (e.g., .167, .25, .33, .5, .67, .75, .83, or to just one decimal point); minute-  reported to the nearest minute in original source (increments of 0.01667); second- reported to the nearest second in original source; fraction of second - reported to fraction of second in original source; decimal degrees to [n] digits- reported in decimal degrees to n digits (where n is minimum precision of the two coordinates); other (see geography.notes) - unusual cases (e.g., composite of multiple sites), as detailed in geography.notes. ",-,manual entry,,,
+11 / K,coordinates.precision,"Precision of coordinates, as reported by source or estimated from maps. When the two coordinates differ in precision, we report precision for whichever is less precise. Parentheses indicate precision levels that were inferred from the values in ForC and require validation against original source.",character (string),"degree- rounded to nearest degree or rough fraction of a degree (e.g., .167, .25, .33, .5, .67, .75, .83, or to just one decimal point); minute-  reported to the nearest minute in original source; second- reported to the nearest second in original source; fraction of second - reported to fraction of second in original source; decimal degrees to [n] digits- reported in decimal degrees to n digits (where n is minimum precision of the two coordinates); other (see geography.notes) - unusual cases (e.g., composite of multiple sites), as detailed in geography.notes. ",-,manual entry,,,
 12 / L,masl,"Elevation in meters above sea level. When a range is given, midpoint is reported.",numeric (double),-,m ,manual entry,1211,1,3900
 13 / M,geography.notes,"Notes pertaining to site name, location, or topography",character (string),-,-,manual entry,155,-,-
 14 / N,mat,Mean annual temperature ,numeric (double),-,C,manual entry,1621,-17,30