Add many more imperial units

core/src/units/builtin.rs

@@ -512,26 +512,50 @@ const IMPERIAL_UNITS: &[UnitTuple] = &[
 	("'", "", "foot", ""),
 	("\"", "", "inch", ""),
 	("foot", "feet", "l@12 inch", ""),
-	("ft", "", "foot", ""),
 	("sqft", "", "=ft^2", ""),
 	("yard", "yards", "l@3 ft", ""),
-	("yd", "", "yard", ""),
 	("mile", "miles", "l@5280 ft", ""),
 	("line", "lines", "1/12 inch", ""),
 	("rod", "", "5.5 yard", ""),
+	("pole", "", "rod", ""),
 	("perch", "", "rod", ""),
 	("furlong", "", "40 rod", ""),
 	("statute_mile", "statute_miles", "mile", ""),
 	("league", "", "3 mile", ""),
 	("chain", "chains", "66 feet", ""),
 	("link", "links", "1/100 chain", ""),
-	("ch", "", "chain", ""),
 	("thou", "", "1/1000 inch", "thousandth of an inch"),
 	("acre", "acres", "10 chain^2", ""),
 	("section", "sections", "mile^2", ""),
 	("township", "townships", "36 sections", ""),
 	("homestead", "homesteads", "160 acres", ""),
 	("point", "points", "l@1/72 inch", ""),
+	("twip", "twips", "l@1/20 point", ""),
+	("poppyseed", "poppyseeds", "l@line", ""),
+	("pica", "", "l@12 points", ""),
+	("barleycorn", "barleycorns", "l@4 poppyseed", ""),
+	("finger", "fingers", "l@63 points", ""),
+	("stick", "sticks", "l@2 inches", ""),
+	("palm", "palms", "l@3 inches", ""),
+	("digit", "digits", "l@1/4 palms", ""),
+	("nail", "nails", "l@3 digits", ""),
+	("span", "spans", "l@4 nails", ""),
+	("hand", "hands", "l@2 sticks", ""),
+	("shaftment", "shaftments", "l@2 palm", ""),
+	("cubit", "cubits", "l@2 span", ""),
+	("ell", "", "l@5 span", ""),
+	("skein", "", "l@96 ell", ""),
+	("spindle", "", "l@120 skein", ""),
+	("link", "links", "l@1/25 rod", ""),
+	("fathom", "fathoms", "l@2 yard", ""),
+	("shackle", "shackles", "l@15 yard", ""),
+	("pace", "paces", "l@5 shaftments", ""),
+	("step", "steps", "l@2 paces", ""),
+	("grade", "", "l@pace", ""),
+	("rope", "", "l@4 steps", ""),
+	("ramsdens_chain", "", "l@5 rope", ""),
+	("roman_mile", "roman_miles", "l@50 ramsdens_chain", ""),
+	("gunters_chain", "gunters_chains", "l@4 rod", ""),
 ];
 
 const LIQUID_UNITS: &[UnitTuple] = &[
@@ -587,6 +611,9 @@ const OTHER_WEIGHTS: &[UnitTuple] = &[
 ];
 
 const IMPERIAL_ABBREVIATIONS: &[UnitTuple] = &[
+	("yd", "", "yard", ""),
+	("ch", "", "chain", ""),
+	("ft", "", "foot", ""),
 	("mph", "", "mile/hr", ""),
 	("mpg", "", "mile/gal", ""),
 	("kph", "", "km/hr", ""),